The Open Public Health Journal




ISSN: 1874-9445 ― Volume 12, 2019
RESEARCH ARTICLE

Experience Assessment of Tobacco Smoking, Alcohol Drinking, and Substance Use Among Shahroud University Students by Crosswise Model Estimation –The Alarm to Families



Katayon Vakilian1, *, Afsaneh Keramat2, Seyyes Abass Mousavi3, Reza Chaman4
1 Medical School, Arak University of Medical Sciences, Arak, Iran
2 Nursing Midwifery School, Shahroud University of Medical Sciences, Shahroud, Iran
3 Medical School, Golestan university of Medical Sciences, Golestan, Iran
4 Department of Epidemiology, Shahroud University of Medical Sciences, Shahroud, Iran

Abstract

Background

In this study, we considered to determine the estimation of experience of substance use, cigarette smoking, and alcohol drinking among Iranian students, using the crosswise model estimation.

Methods

The Cross-sectional study was done in November 2012 to February 2013. A total of 1500 students were selected from Shahroud Universities, using multistage sampling. Three pairs of questions were designed, based on the crosswise model, and the questionnaire was presented to the students after written consent forms were obtained. Data were analyzed using Ch2, t-test and crosswise test.

Results

The Mean ±SD age of girls was 20.26±1.49 vs boys 20.32±1. 575. Based on the findings, the prevalence of cigarette smoking, alcohol drinking, and substance abuse among students was 20%, 33%, and 7%, respectively.

Conclusion

Considering the high prevalence of drug use among Iranian students and the unbiased design of this study, it is suggested that the necessary skills be incorporated and introduced in the school curriculum for students at primary schools.

Keywords: Adolescent, Alcohol, Epidemiology, Smoking, Public health, Addiction.


Article Information


Identifiers and Pagination:

Year: 2019
Volume: 12
First Page: 33
Last Page: 37
Publisher Id: TOPHJ-12-33
DOI: 10.2174/1874944501912010033

Article History:

Received Date: 15/09/2018
Revision Received Date: 27/01/2019
Acceptance Date: 7/02/2019
Electronic publication date: 25/02/2019
Collection year: 2019

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© 2019 Vakilian et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


* Address correspondence to this author at the Medical School, Arak University of Medical Sciences, Arak, Iran; Tel: 098-8634173505; E-mail: dr.kvakilian@arakmu.ac.ir





1. INTRODUCTION

Illegal drug use is now considered as one of the most important social, political, and health challenges in different countries around the world including Iran. Due to its geographical location and young population, Iran is majorly exposed to this global problem [1Jamshidi F, Nazari I, Malayeri HT, Rahimi Z, Cheraghi M. Pattern of drug abuse in addicts self-referred drug rehabilitation centers in Khuzestan province-Iran, 2014-2015. Arch Med Sadowej Kryminol 2016; 66(1): 1-12.]. According to statistics, the rate of drug use in Iran imposed a heavy burden on the health care system [2Moazen B, Shokoohi M, Noori A, et al. Burden of drug and alcohol use disorders in Iran: Findings from the Global Burden of Disease Study 2010. Arch Iran Med 2015; 18(8): 480-5.
[PMID: 26265515]
].

According to various studies, people start to smoke cigarettes and use drugs at the age of 15 or 17 years. Teenagers normally start with the use of legal substances such as tobacco and then turn to illegal substances such as alcohol and drug [3Heydari ST, Izedi S, Sarikhani Y, et al. The prevalence of substance use and associated risk factors among university students in the city of Jahrom, Southern Iran. Int J High Risk Behav Addict 2015; 4(2): e22381.
[http://dx.doi.org/10.5812/ijhrba.4(2)2015.22381] [PMID: 26097836]
-5Kelishadi R, Sadry G, Zadegan NS, et al. Smoking, adolescents and health: Isfahan healthy heart programme-heart health promotion from childhood. Asia Pac J Public Health 2004; 16(1): 15-22.
[http://dx.doi.org/10.1177/101053950401600104] [PMID: 18839863]
]. Several studies have reported reduced age of the onset of substance use [4Kabir K, Mohammadpoorasl A, Esmaeelpour R, Aghazamani F, Rostami F. Tobacco use and substance abuse in students of Karaj Universities. Int J Prev Med 2016; 7: 105.
[http://dx.doi.org/10.4103/2008-7802.190091] [PMID: 27688869]
, 6Maroun N, Kahi H, Chemaly N, ElKahi H, Akl EA. Needs Assessment for a University-based Youth Clinic in Beirut, Lebanon: A Mixed Quantitative and Qualitative Study. TOPHJ 2013; 6: 21-30.
[http://dx.doi.org/10.2174/1874944501306010021]
]. Based on a report in 2014, 27million people, aged 12 years or older, had used some type of illegal substance over the past 30 days. In addition, 66.9 million people were current users of tobacco and alcohol, and 139.70 million cases had used these substances over the past month. Based on a previous study on Karaj University students, the prevalence of tobacco smoking, alcohol drinking, and use of recreational drugs, were estimated at 9%, 9,5%,7%, and 4.87%, respectively [4Kabir K, Mohammadpoorasl A, Esmaeelpour R, Aghazamani F, Rostami F. Tobacco use and substance abuse in students of Karaj Universities. Int J Prev Med 2016; 7: 105.
[http://dx.doi.org/10.4103/2008-7802.190091] [PMID: 27688869]
]. On the other hand, in Isfahan, the prevalence of ecstasy use was reported to be 2.2%, while the prevalence of tobacco smoking was 8.1% [6Maroun N, Kahi H, Chemaly N, ElKahi H, Akl EA. Needs Assessment for a University-based Youth Clinic in Beirut, Lebanon: A Mixed Quantitative and Qualitative Study. TOPHJ 2013; 6: 21-30.
[http://dx.doi.org/10.2174/1874944501306010021]
]. All the discussed studies have evaluated the prevalence of substance use, Alcohol consumption and tobacco smoking, using direct questions [1Jamshidi F, Nazari I, Malayeri HT, Rahimi Z, Cheraghi M. Pattern of drug abuse in addicts self-referred drug rehabilitation centers in Khuzestan province-Iran, 2014-2015. Arch Med Sadowej Kryminol 2016; 66(1): 1-12., 2Moazen B, Shokoohi M, Noori A, et al. Burden of drug and alcohol use disorders in Iran: Findings from the Global Burden of Disease Study 2010. Arch Iran Med 2015; 18(8): 480-5.
[PMID: 26265515]
, 4Kabir K, Mohammadpoorasl A, Esmaeelpour R, Aghazamani F, Rostami F. Tobacco use and substance abuse in students of Karaj Universities. Int J Prev Med 2016; 7: 105.
[http://dx.doi.org/10.4103/2008-7802.190091] [PMID: 27688869]
]. All the discussed studies have evaluated the prevalence of drug use, smoking, and alcohol using direct questions. When encountering sensitive questions in direct, people may avoid giving an honest answer for reasons such as fear, mistrust, and guilt. Consequently, the reliability of the findings is compromised due to regular deviation from the actual state. In this method, two questions, i.e., one sensitive and one insensitive question (independent of the sensitive question), are presented to the respondent. This method is easier for the respondent to comprehend, and is more convenient to implement; also, the negative response bias seems to be less frequent [7Yu J-W, Tian G-L, Tang M-L. Two new models for survey sampling with sensitive characteristic: design and analysis. Metrika 2008; 67(3): 251-63.
[http://dx.doi.org/10.1007/s00184-007-0131-x]
]. With this background in mind, in this study, we aimed to investigate the prevalence of experience of tobacco smoking, alcohol drinking, and substance use among Iranian students by the crosswise model analysis.

2. METHODS

This was a cross sectional study conducted in November 2012 to February 2013. After acceptance of the ethical committee (code 890/08) of Shahroud University of Medical Sciences, a total of 1500 samples were selected through multi stage sampling. The sample size was considered as 50% of the rate of prevalence and given that the use of cluster sampling was on the agenda, the design effect = 2 with a response rate = 80% and considering an error type I of 0.05, 1000 persons were enrolled. But as it considered sensitive questions including drug abuse and alcohol to be used by a crosswise method, 50% was added to the sample size and finally, 1500 students were enrolled in the study. Students were selected from all Shahroud Universities (6 universities). Because the number of university students varied from 400 to 9,000; consequently, more clusters were selected from universities with more students. Each classroom corresponded to one cluster. All of the 6 universities were included in the sampling.

After obtaining written permission from the universities and informing the authorities, classes held on the day of the researcher's visit were randomly selected through drawing lots. After selecting the classes, the aim of the study was explained to the university instructor and the coordination requirements were met.

The last 15 min of the class was devoted to completing the questionnaires. After entering the classroom, the researcher introduced herself to the students. After describing the study objectives and its significance, the students were asked to voluntarily participate in the study. The students were also assured about the confidentiality of the data. For estimation of high-risk behaviors, we considered the crosswise model. This method does not require a random device, is easier for the respondent to comprehend, and is more convenient to implement In the present study, the crosswise model consisted of pairs question for every sensitive question, including one sensitive and one insensitive. Also, every pairs question had 2 choices “A” and “B”. The respondent was asked to select the option ‘A’ if the answer to both questions was ‘Yes’ or ‘No’; otherwise, he/she was asked to select option ‘B’. This method does not require a random device, is easier for the respondent to comprehend, and is more convenient to implement. In the present study, the crosswise model consisted of question pairs, including one sensitive and one insensitive question (independent of one another). The pair question is given in Table 1. These questions were also used by Shamcipour et al. [8Shamsipour M, Yunesian M, Fotouhi A, et al. Estimating the prevalence of illicit drug use among students using the crosswise model. Subst Use Misuse 2014; 49(10): 1303-10.
[http://dx.doi.org/10.3109/10826084.2014.897730] [PMID: 24689805]
] and Vakilian et al. [9Vakilian K, Mousavi SA, Keramat A. Estimation of sexual behavior in the 18-to-24-years-old Iranian youth based on a crosswise model study. BMC Res Notes 2014; 7(1): 28.
[http://dx.doi.org/10.1186/1756-0500-7-28] [PMID: 24410965]
, 10Vakilian K, Mousavi SA, Keramat A, Chaman R. Knowledge, attitude, self-efficacy and estimation of frequency of condom use among Iranian students based on a crosswise model. Int J Adolesc Med Health 2016:; 13;30(1): 1-4.]. The prevalence of the insensitive questions was estimated at 24% in population in other studies [8Shamsipour M, Yunesian M, Fotouhi A, et al. Estimating the prevalence of illicit drug use among students using the crosswise model. Subst Use Misuse 2014; 49(10): 1303-10.
[http://dx.doi.org/10.3109/10826084.2014.897730] [PMID: 24689805]
-10Vakilian K, Mousavi SA, Keramat A, Chaman R. Knowledge, attitude, self-efficacy and estimation of frequency of condom use among Iranian students based on a crosswise model. Int J Adolesc Med Health 2016:; 13;30(1): 1-4.]. Also, in this study, the prevalence of the second non-sensitive question(names of girls as Fatemeh, Zehra, Maryam) was estimated to be 24% according to the list of people in the Civil Status Registration. For the organization with the name Ali or Mohammad or a combination of both, the estimation of the prevalence of tobacco smoking, alcohol drinking, and substance use was obtained by Eq (1):

λ = the proportion of those who chose A

π = the proportion of those who had sexual abuse.

p = the probability of positive response to insensitive item p =0.24.

(1)

An orthogonal estimate is obtained through Eq. (2)

(2)

The variance of π is calculated as follows in Eq. (3). It should be noted that the second part of the equation is due to the insensitive item.

(3)

The collected data were analyzed with descriptive (Mean, Percent) and inferential tests, (independent t-test, chi2, and Crosswise test) using SPSS 18 and STATA softwares.

3. RESULTS

Mean± SD age of girls was 20.26 ± 1.49 vs boys 20.32 ± 1.575, with 919(62.1%) being females and 539(36.1%) males. The other demographic characteristics of the participants are presented in Table 2. Crosswise test showed that 20% college youth had experienced tobacco smoking. Also, 33% and 7% had experienced alcohol and substance use respectively. Difference between females and males is given in Table 3.

4. DISCUSSION

The prevalence of alcohol consumption has been reported to be higher than tobacco smoking. According to the results of the present study, 27% of girls and 39% of boys had a previous experience of alcohol use during their lives. Today, the prevalence of tobacco smoking and alcohol drinking is on the rise in Iran. Although the use of alcohol is illegal in our country due to Islamic restrictions [4Kabir K, Mohammadpoorasl A, Esmaeelpour R, Aghazamani F, Rostami F. Tobacco use and substance abuse in students of Karaj Universities. Int J Prev Med 2016; 7: 105.
[http://dx.doi.org/10.4103/2008-7802.190091] [PMID: 27688869]
, 6Maroun N, Kahi H, Chemaly N, ElKahi H, Akl EA. Needs Assessment for a University-based Youth Clinic in Beirut, Lebanon: A Mixed Quantitative and Qualitative Study. TOPHJ 2013; 6: 21-30.
[http://dx.doi.org/10.2174/1874944501306010021]
], its consumption has increased among young Iranians [6Maroun N, Kahi H, Chemaly N, ElKahi H, Akl EA. Needs Assessment for a University-based Youth Clinic in Beirut, Lebanon: A Mixed Quantitative and Qualitative Study. TOPHJ 2013; 6: 21-30.
[http://dx.doi.org/10.2174/1874944501306010021]
]. In previous research, the prevalence of alcohol use was estimated at 7% [11Abbasi-Ghahramanloo A, Fotouhi A, Zeraati H, Rahimi-Movaghar A. Prescription drugs, alcohol, and illicit substance use and their correlations among medical sciences students in iran. Int J High Risk Behav Addict 2015; 4(1): e21945.
[http://dx.doi.org/10.5812/ijhrba.21945] [PMID: 25821750]
], while in the present study, the prevalence was reported to be 33% (without bias); therefore, the increased rate of alcohol consumption was confirmed in our study.

Table 1
Items in the crosswise model questionnaire.


Table 2
Demographic characteristics of the students at Shahroud universities divided


Table 3
The prevalence of experience of high-risk behaviors among female and male students in Shahroud universities (×100).


In addition, in another study, the highest frequency of alcohol abuse was reported among school students, as well as those aged 20-22 years [12Momtazi S, Rawson R. Substance abuse among Iranian high school students. Curr Opin Psychiatry 2010; 23(3): 221-6.
[http://dx.doi.org/10.1097/YCO.0b013e328338630d] [PMID: 2030 8905]
]. Several studies have shown that alcohol consumption is more prevalent in large cities than in small towns. Previous reports have presented prevalence rates of 15.5%, 11 %, Tehran, Kerman, respectively. Also, in these studies, the prevalence was lower among women than men [6Maroun N, Kahi H, Chemaly N, ElKahi H, Akl EA. Needs Assessment for a University-based Youth Clinic in Beirut, Lebanon: A Mixed Quantitative and Qualitative Study. TOPHJ 2013; 6: 21-30.
[http://dx.doi.org/10.2174/1874944501306010021]
, 13Baheiraei A, Hamzehgardeshi Z, Mohammadi MR, Nedjat S, Mohammadi E. Alcohol and drug use prevalence and factors associated with the experience of alcohol use in Iranian adolescents. Iran Red Crescent Med J 2013; 15(3): 212-7.
[http://dx.doi.org/10.5812/ircmj.4022] [PMID: 23984000]
].

Alcohol consumption has negative consequences for girls, such as increased testosterone level, which leads to menstrual disturbances and infertility [14Peck JD, Peck BM, Skaggs VJ, Fukushima M, Kaplan HB. Socio-environmental factors associated with pubertal development in female adolescents: the role of prepubertal tobacco and alcohol use. J Adolesc Health 2011; 48(3): 241-6.
[http://dx.doi.org/10.1016/j.jadohealth.2010.06.018] [PMID: 2133 8894]
]. In men, an average rate of consumption increases the testosterone level, although it does not change sperm quality. Nevertheless, based on a previous study, using 20 units of alcohol per week could affect sperm quality [15Jensen TK, Swan S, Jørgensen N, et al. Alcohol and male reproductive health: A cross-sectional study of 8344 healthy men from Europe and the USA. Hum Reprod 2014; 29(8): 1801-9.
[http://dx.doi.org/10.1093/humrep/deu118] [PMID: 24893607]
]. In fact, one of the reasons for increased infertility in Iran might be alcohol abuse during adolescence, which calls for further research in this area.

In the present study, 14% of female and 22%of male students had a prior history of tobacco smoking. In studies conducted in 43 countries, the prevalence of tobacco smoking varied from 1% to 39.6%. According to the literature, the prevalence of smoking varies in different communities, depending on the cultural, social, and economic factors [16Special Report. Tobacco use among youth: A cross country comparison.the global youth tobacco survey collaborative grouptobacco control. BMJ 2002; 11(3): 252-70.
[PMID: 12198280]
]. Also, the consumption rate seems to vary in different cities of Iran, with rates ranging from 2.3% in Zahedan to 39.6% in Tehran [17Taremian F, Bolhari J, Pairavi H, Ghazi Tabatabaeii M. The prevalence of drug abuse among university students in Tehran. IJPCP Iranian 2008; 13(4): 335-42.].

Investigations show that drug addiction starts with smoking cigarettes [18Nahvizadeh MM, Akhavan S, Arti S, et al. A review study of substance abuse status in high school students, Isfahan, Iran. Int J Prev Med 2014; 5(Suppl. 2): S77-82.
[http://dx.doi.org/10.4103/2008-7802.157661] [PMID: 26157571]
]. Smoking can threaten the reproductive health of girls and increase the risk of cervical and ovarian cancer in middle age [19Lombardi EMS, Prado GF, Santos UdeP, Fernandes FL. Women and smoking: risks, impacts, and challenges. J Bras Pneumol 2011; 37(1): 118-28.118-28.Doi.org/10.1590/S806-37132011000100017
[http://dx.doi.org/10.1590/S1806-37132011000100017] [PMID: 2139 0440]
]. Therefore, considering the high prevalence of smoking in Iranian girls, if proper planning is not established to prevent smoking among girls, chronic diseases and reduced fertility can be expected in the future.

In this study, the prevalence of drug use was reported to be 19%in boys and 2% in girls. Nahvizadeh et al. conducted a review study in which they showed that a study conducted in Kerman, Iran in 2006, the prevalence of drug abuse was reported to be 26.5%and 11.5% among boys and girls, respectively. Also, in Zanjan, Iran 2010, the prevalence rate was reported to be 11.2% among high school students. In this study, opium and cannabis were the most frequently used illegal substances [20Brook DW, Brook JS, Pahl T, Montoya I. The longitudinal relationship between drug use and risky sexual behaviors among colombian adolescents. Arch Pediatr Adolesc Med 2002; 156(11): 1101-7.
[http://dx.doi.org/10.1001/archpedi.156.11.1101] [PMID: 12413337]
]. In all the of the mentioned studies in Iran, lower rates of drug abuse were reported among young girls in comparison with boys [6Maroun N, Kahi H, Chemaly N, ElKahi H, Akl EA. Needs Assessment for a University-based Youth Clinic in Beirut, Lebanon: A Mixed Quantitative and Qualitative Study. TOPHJ 2013; 6: 21-30.
[http://dx.doi.org/10.2174/1874944501306010021]
, 17Taremian F, Bolhari J, Pairavi H, Ghazi Tabatabaeii M. The prevalence of drug abuse among university students in Tehran. IJPCP Iranian 2008; 13(4): 335-42.]; the same finding was reported in the present study. However, despite the lower rates of drug abuse among girls, the risks can be major for their health [18Nahvizadeh MM, Akhavan S, Arti S, et al. A review study of substance abuse status in high school students, Isfahan, Iran. Int J Prev Med 2014; 5(Suppl. 2): S77-82.
[http://dx.doi.org/10.4103/2008-7802.157661] [PMID: 26157571]
]. Previous studies show that alcohol and drugs can increase high-risk sexual behaviors among the youth [19Lombardi EMS, Prado GF, Santos UdeP, Fernandes FL. Women and smoking: risks, impacts, and challenges. J Bras Pneumol 2011; 37(1): 118-28.118-28.Doi.org/10.1590/S806-37132011000100017
[http://dx.doi.org/10.1590/S1806-37132011000100017] [PMID: 2139 0440]
] and lead to an increased prevalence of HIV infection in countries [21Kaljee LM, Genberg BL, Minh TT, Tho LH, Thoa LT, Stanton B. Alcohol use and HIV risk behaviors among rural adolescents in Khanh Hoa Province Viet Nam. Health Educ Res 2005; 20(1): 71-80.
[http://dx.doi.org/10.1093/her/cyg096] [PMID: 15198997]
].

CONCLUSION

Considering the high prevalence of substance use, alcohol consumption and tobacco smoking among Iranian students and the unbiased design of this study, necessary skills should be incorporated in the school curriculum for adolescents at primary schools.

Limitations and suggestions: Using the indirect method for data gathering (crosswise model) was a strong point. Also, this method is a limitation too. Because we could not evaluate the relationship between demographic characteristics of students to using substance, alcohol use and smoking. Researchers recommend using crosswise model for sensitive subjects such as violence and sexual abuse.

ETHICS APPROVAL AND CONSENT TO PARTICIPATE

The study was approved by the Ethical committee (cod 890/08) of Shahroud University of Medical Sciences.

HUMAN AND ANIMAL RIGHTS

No animals were used in this research. All human research procedures followed were in accordance with the ethical standards of the committee responsible for human experimentation (institutional and national), and with the Helsinki Declaration of 1975, as revised in 2013.

CONSENT FOR PUBLICATION

Written informed consent was obtained from all the participants.

CONFLICT INTEREST

The authors declare that there is no conflict of interest, financial or otherwise.

ACKNOWLEDGEMENTS

This is a part of Ph.D. thesis was done by Katayon Vakilian in Shahroud University of Medical Sciences under the ethics code 890/08. The authors would like to thank all students participating in this research.

REFERENCES

[1] Jamshidi F, Nazari I, Malayeri HT, Rahimi Z, Cheraghi M. Pattern of drug abuse in addicts self-referred drug rehabilitation centers in Khuzestan province-Iran, 2014-2015. Arch Med Sadowej Kryminol 2016; 66(1): 1-12.
[2] Moazen B, Shokoohi M, Noori A, et al. Burden of drug and alcohol use disorders in Iran: Findings from the Global Burden of Disease Study 2010. Arch Iran Med 2015; 18(8): 480-5.
[PMID: 26265515]
[3] Heydari ST, Izedi S, Sarikhani Y, et al. The prevalence of substance use and associated risk factors among university students in the city of Jahrom, Southern Iran. Int J High Risk Behav Addict 2015; 4(2): e22381.
[http://dx.doi.org/10.5812/ijhrba.4(2)2015.22381] [PMID: 26097836]
[4] Kabir K, Mohammadpoorasl A, Esmaeelpour R, Aghazamani F, Rostami F. Tobacco use and substance abuse in students of Karaj Universities. Int J Prev Med 2016; 7: 105.
[http://dx.doi.org/10.4103/2008-7802.190091] [PMID: 27688869]
[5] Kelishadi R, Sadry G, Zadegan NS, et al. Smoking, adolescents and health: Isfahan healthy heart programme-heart health promotion from childhood. Asia Pac J Public Health 2004; 16(1): 15-22.
[http://dx.doi.org/10.1177/101053950401600104] [PMID: 18839863]
[6] Maroun N, Kahi H, Chemaly N, ElKahi H, Akl EA. Needs Assessment for a University-based Youth Clinic in Beirut, Lebanon: A Mixed Quantitative and Qualitative Study. TOPHJ 2013; 6: 21-30.
[http://dx.doi.org/10.2174/1874944501306010021]
[7] Yu J-W, Tian G-L, Tang M-L. Two new models for survey sampling with sensitive characteristic: design and analysis. Metrika 2008; 67(3): 251-63.
[http://dx.doi.org/10.1007/s00184-007-0131-x]
[8] Shamsipour M, Yunesian M, Fotouhi A, et al. Estimating the prevalence of illicit drug use among students using the crosswise model. Subst Use Misuse 2014; 49(10): 1303-10.
[http://dx.doi.org/10.3109/10826084.2014.897730] [PMID: 24689805]
[9] Vakilian K, Mousavi SA, Keramat A. Estimation of sexual behavior in the 18-to-24-years-old Iranian youth based on a crosswise model study. BMC Res Notes 2014; 7(1): 28.
[http://dx.doi.org/10.1186/1756-0500-7-28] [PMID: 24410965]
[10] Vakilian K, Mousavi SA, Keramat A, Chaman R. Knowledge, attitude, self-efficacy and estimation of frequency of condom use among Iranian students based on a crosswise model. Int J Adolesc Med Health 2016:; 13;30(1): 1-4.
[11] Abbasi-Ghahramanloo A, Fotouhi A, Zeraati H, Rahimi-Movaghar A. Prescription drugs, alcohol, and illicit substance use and their correlations among medical sciences students in iran. Int J High Risk Behav Addict 2015; 4(1): e21945.
[http://dx.doi.org/10.5812/ijhrba.21945] [PMID: 25821750]
[12] Momtazi S, Rawson R. Substance abuse among Iranian high school students. Curr Opin Psychiatry 2010; 23(3): 221-6.
[http://dx.doi.org/10.1097/YCO.0b013e328338630d] [PMID: 2030 8905]
[13] Baheiraei A, Hamzehgardeshi Z, Mohammadi MR, Nedjat S, Mohammadi E. Alcohol and drug use prevalence and factors associated with the experience of alcohol use in Iranian adolescents. Iran Red Crescent Med J 2013; 15(3): 212-7.
[http://dx.doi.org/10.5812/ircmj.4022] [PMID: 23984000]
[14] Peck JD, Peck BM, Skaggs VJ, Fukushima M, Kaplan HB. Socio-environmental factors associated with pubertal development in female adolescents: the role of prepubertal tobacco and alcohol use. J Adolesc Health 2011; 48(3): 241-6.
[http://dx.doi.org/10.1016/j.jadohealth.2010.06.018] [PMID: 2133 8894]
[15] Jensen TK, Swan S, Jørgensen N, et al. Alcohol and male reproductive health: A cross-sectional study of 8344 healthy men from Europe and the USA. Hum Reprod 2014; 29(8): 1801-9.
[http://dx.doi.org/10.1093/humrep/deu118] [PMID: 24893607]
[16] Special Report. Tobacco use among youth: A cross country comparison.the global youth tobacco survey collaborative grouptobacco control. BMJ 2002; 11(3): 252-70.
[PMID: 12198280]
[17] Taremian F, Bolhari J, Pairavi H, Ghazi Tabatabaeii M. The prevalence of drug abuse among university students in Tehran. IJPCP Iranian 2008; 13(4): 335-42.
[18] Nahvizadeh MM, Akhavan S, Arti S, et al. A review study of substance abuse status in high school students, Isfahan, Iran. Int J Prev Med 2014; 5(Suppl. 2): S77-82.
[http://dx.doi.org/10.4103/2008-7802.157661] [PMID: 26157571]
[19] Lombardi EMS, Prado GF, Santos UdeP, Fernandes FL. Women and smoking: risks, impacts, and challenges. J Bras Pneumol 2011; 37(1): 118-28.118-28.Doi.org/10.1590/S806-37132011000100017
[http://dx.doi.org/10.1590/S1806-37132011000100017] [PMID: 2139 0440]
[20] Brook DW, Brook JS, Pahl T, Montoya I. The longitudinal relationship between drug use and risky sexual behaviors among colombian adolescents. Arch Pediatr Adolesc Med 2002; 156(11): 1101-7.
[http://dx.doi.org/10.1001/archpedi.156.11.1101] [PMID: 12413337]
[21] Kaljee LM, Genberg BL, Minh TT, Tho LH, Thoa LT, Stanton B. Alcohol use and HIV risk behaviors among rural adolescents in Khanh Hoa Province Viet Nam. Health Educ Res 2005; 20(1): 71-80.
[http://dx.doi.org/10.1093/her/cyg096] [PMID: 15198997]

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"It is important that students and researchers from all over the world can have easy access to relevant, high-standard and timely scientific information. This is exactly what Open Access Journals provide and this is the reason why I support this endeavor."


Jacques Descotes
(Centre Antipoison-Centre de Pharmacovigilance, France)

"Publishing research articles is the key for future scientific progress. Open Access publishing is therefore of utmost importance for wider dissemination of information, and will help serving the best interest of the scientific community."


Patrice Talaga
(UCB S.A., Belgium)

"Open access journals are a novel concept in the medical literature. They offer accessible information to a wide variety of individuals, including physicians, medical students, clinical investigators, and the general public. They are an outstanding source of medical and scientific information."


Jeffrey M. Weinberg
(St. Luke's-Roosevelt Hospital Center, USA)

"Open access journals are extremely useful for graduate students, investigators and all other interested persons to read important scientific articles and subscribe scientific journals. Indeed, the research articles span a wide range of area and of high quality. This is specially a must for researchers belonging to institutions with limited library facility and funding to subscribe scientific journals."


Debomoy K. Lahiri
(Indiana University School of Medicine, USA)

"Open access journals represent a major break-through in publishing. They provide easy access to the latest research on a wide variety of issues. Relevant and timely articles are made available in a fraction of the time taken by more conventional publishers. Articles are of uniformly high quality and written by the world's leading authorities."


Robert Looney
(Naval Postgraduate School, USA)

"Open access journals have transformed the way scientific data is published and disseminated: particularly, whilst ensuring a high quality standard and transparency in the editorial process, they have increased the access to the scientific literature by those researchers that have limited library support or that are working on small budgets."


Richard Reithinger
(Westat, USA)

"Not only do open access journals greatly improve the access to high quality information for scientists in the developing world, it also provides extra exposure for our papers."


J. Ferwerda
(University of Oxford, UK)

"Open Access 'Chemistry' Journals allow the dissemination of knowledge at your finger tips without paying for the scientific content."


Sean L. Kitson
(Almac Sciences, Northern Ireland)

"In principle, all scientific journals should have open access, as should be science itself. Open access journals are very helpful for students, researchers and the general public including people from institutions which do not have library or cannot afford to subscribe scientific journals. The articles are high standard and cover a wide area."


Hubert Wolterbeek
(Delft University of Technology, The Netherlands)

"The widest possible diffusion of information is critical for the advancement of science. In this perspective, open access journals are instrumental in fostering researches and achievements."


Alessandro Laviano
(Sapienza - University of Rome, Italy)

"Open access journals are very useful for all scientists as they can have quick information in the different fields of science."


Philippe Hernigou
(Paris University, France)

"There are many scientists who can not afford the rather expensive subscriptions to scientific journals. Open access journals offer a good alternative for free access to good quality scientific information."


Fidel Toldrá
(Instituto de Agroquimica y Tecnologia de Alimentos, Spain)

"Open access journals have become a fundamental tool for students, researchers, patients and the general public. Many people from institutions which do not have library or cannot afford to subscribe scientific journals benefit of them on a daily basis. The articles are among the best and cover most scientific areas."


M. Bendandi
(University Clinic of Navarre, Spain)

"These journals provide researchers with a platform for rapid, open access scientific communication. The articles are of high quality and broad scope."


Peter Chiba
(University of Vienna, Austria)

"Open access journals are probably one of the most important contributions to promote and diffuse science worldwide."


Jaime Sampaio
(University of Trás-os-Montes e Alto Douro, Portugal)

"Open access journals make up a new and rather revolutionary way to scientific publication. This option opens several quite interesting possibilities to disseminate openly and freely new knowledge and even to facilitate interpersonal communication among scientists."


Eduardo A. Castro
(INIFTA, Argentina)

"Open access journals are freely available online throughout the world, for you to read, download, copy, distribute, and use. The articles published in the open access journals are high quality and cover a wide range of fields."


Kenji Hashimoto
(Chiba University, Japan)

"Open Access journals offer an innovative and efficient way of publication for academics and professionals in a wide range of disciplines. The papers published are of high quality after rigorous peer review and they are Indexed in: major international databases. I read Open Access journals to keep abreast of the recent development in my field of study."


Daniel Shek
(Chinese University of Hong Kong, Hong Kong)

"It is a modern trend for publishers to establish open access journals. Researchers, faculty members, and students will be greatly benefited by the new journals of Bentham Science Publishers Ltd. in this category."


Jih Ru Hwu
(National Central University, Taiwan)


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