Indicators are developed for the assessment of health needs as well as the monitoring, efficacious implementation and evaluation of the impact of programs. Indicators are required to access data that impose a heavy burden on the healthcare system. Therefore, development and selection of indicators prevent their invalidated and untested use. Selection of indicators may be done by active groups, support-seeking groups, organizations and academic community on the basis of local/national programs. A good indicator needs to be completely transparent, describable and easy to acquire and interpret and should be able to assess and monitor programs designed on changes in risky behavior. It should also be traceable over time and capable of being developed with minimum cost [1-3]. Although numerous disease control programs employ bioindicators for evaluation and monitoring purposes, biological information might be inaccessible for AIDS and reproductive behaviors. Presently, AIDS and reproductive health programs revolve more around prevention. Also, AIDS related programs, particularly those targeting the youths are more directed toward preventive measures. In the absence of AIDS prevalence rate data, behavior change models have been at the front burner of planning in numerous countries. Although the number of sexually transmitted AIDS cases in Iran is on the increase; however, evidence regarding the cognitive, psychological and behavioral aspects of AIDS is insufficient and inadequate. This is because behavior change programs lack adequate data, making their effect immeasurable in most cases [4, 5]. The most typical framework for the selection of indicators is the “input-output” and short-term outcomes. The incident of AIDS is an outcome indicator, which is usually measured in countries with HIV surveillance systems [6]. Despite the relatively low HIV prevalence rate (less than 5%) among the Iranian general population, the number of sexually transmitted HIV cases is on the increase, with 4.5% of female sex workers suffering from HIV [7]. Risky sexual behaviors among the Iranian youth population have been reported to be 19.5-41% [5, 8]. In 2014, 106,000 AIDS cases were reported, which is expected to increase significantly by 2020 [9]. In 2013, 57% of HIV cases in Iran were in the age bracket of 15-34 [10]. Consequently, it is necessary to develop and implement reproductive health and HIV indicators to achieve a more favorable blueprint for the prevention of AIDS among the Iranian youth population. Given the insufficient number of indicators developed to study AIDS prevention variables in Iran, the present study was conducted to develop and implement AIDS and reproductive health indicators for the Iranian youth population.

AIDS and reproductive health indicators were developed employing indicators related to youth studies and various articles and websites including the World Health Organization (WHO), Joint United Nations Program on HIV/AIDS (UNAID), Family Health International (FHI), and the Center for Disease Control and Prevention (CDC). An indicator bank was prepared after ascertaining that the Iranian Ministry of Health and Medical Education had not already developed the specified indicators to study AIDS prevention programs. The indicators were then submitted to a focus group comprised of health professionals in the field of communicable disease control (including AIDS), family health experts and four reproductive health experts who were also university faculty members. After stating the objective of the study, the indicators were classified into a 5-point Likert scale (useful, sensitive, special, accessible, and comprehensible) based on the WHO criteria. Indicators were verified by the majority of votes. After prioritization, 28 out of 40 indicators were examined and developed for implementation. For the “knowledge and perceived threat of AIDS” indicator, the CDC questionnaire was employed [11]. A 5-point Likert scale, ranging from “I am sure it is true” to “I am sure it is not true”, was used to score knowledge of AIDS, with 60 points being the maximum obtainable score. The scores were classified into high, medium and low levels of knowledge. Regarding the perceived threat of AIDS, five 5-point Likert scale items were considered with the maximum score being 25. The obtainable scores were grouped into three categories of “poor”, “medium”, and “good”. Regarding attitude to sexual abstinence, the WHO questionnaire was employed [12].This questionnaire was previously administered to male adolescents in Tehran by Mohammadi et al. [13]. Eight 5-point Likert scale items were included in the study for this indicator with the maximum score being 40. The obtainable scores were grouped into “poor”, “medium” and “good” categories. As regard sexual abstinence self-efficacy, eight 5-point Likert scale items were included in the study with the maximum score being 40. The obtainable scores were grouped into “poor”, “medium”, and “good” categories [14]. Regarding knowledge of and attitude toward condoms, the CDC scale was employed [12]. Knowledge items about condom were presented in the form of “yes”, “no”, and “no opinion” answers. The correct answer was given 1 point, whereas the incorrect and “no opinion” answers were given zero points. Five 5-point Likert scale items were used for attitudinal items relating to condom use, with 25 points being the maximum obtainable score. The obtainable scores were classified into “poor”, “medium”, and “good” groups. Five 5-point Likert scale items were considered for condom self-efficacy [14], with the maximum score being 25. Indirect items for the measurement of reproductive health behaviors were derived from the CDC questionnaire [11]. The reliability of the questionnaire was verified employing the test-retest technique. The Pearson's correlation coefficients for knowledge of HIV, perceived threat of AIDS, attitude to sexual abstinence, attitude to condom, abstinence self-efficacy and condom self-efficacy were r=0.72, r=0.94, r=0.6, r=0.72, r=0.65, and r=0.67, respectively. Internal validity was assessed using Cronbach's alpha with the following coefficients for knowledge of condom, knowledge of AIDS, perceived threat of AIDS, attitude to sexual abstinence, abstinence self-efficacy, condom self-efficacy, and attitude to condom, respectively: α=0.60, α=0.60, α=0.62, α=0.87, α=0.81, α=0.80, and α=0.61. The results had been previously published in another article [15].

Adam Chuck et al., questionnaire was employed to evaluate items relating to adolescent's comfort when talking to parents, reproductive healthcare providers and friends [16]. Before administration, the items were pre-tested on 10 female and 10 male students to ensure that the words were fully understood.

In the next stage, i.e. implementation of indicators, 1500 female and male students in the age bracket of 18-24 were included in the study. Multistage sampling was employed. Each university and class was initially considered a single stratum and cluster, respectively. The number of clusters per university was assigned based on the number of students in each university in proportion to the total number of students in the university of Shahroud. After obtaining permission from the universities and stating the objective of the study, the questionnaires were distributed to students during the end of lecture time upon the agreement of the education officials and were then collected after 45 minutes. To ensure that the information provided were confidential, students were asked not to write down their names and fields of study. Data were analyzed using SPSS software, version 20 and descriptive-analytical statistics such as percentage, mean scores, t-test analysis and chi-squared test.

The mean age of female and male students was 20.16±1.49 and 20.32±1.575, respectively. Other characteristics are presented in Table 1. Results regarding knowledge of AIDS showed that 15 (1.7%) of female and 26 (5.1%) of male students answered correctly to questions on whether “AIDS can be transmitted through semen” or not; the difference was statistically significant (P = 0.000). Responding to whether “AIDS can be transmitted through the use of a previously used toilet by an individual suffering from AIDS”, 168 (18.8%) of female and 166 (32.0%) of male students answered correctly; the difference was statistically significant (P = 0.000). Responding to whether “people suffering from AIDS are typically thin and feeble”, 49 (5.5%) of female and 47 (9.1%) of male students answered correctly; the difference was statistically significant (P = 0.021). Responding to whether “mosquito bites may transmit AIDS” or not, 199 (22.1%) of female and 114 (21.7%) of male students answered correctly; the difference was statistically significant (P = 0.000). A total of 807 (88.3%) female and 428 (80.8%) male students were aware of tubal ligation techniques. A total of 870 (95.4%) female and 510 (95.5%) male students were knowledgeable about the fact that condoms cannot be used more than once. A total of 414 (45.6%) female and 174 (33.1%) male students were familiar with genital herpes as a kind of Sexually Transmitted Infection (STI). A number of the questionnaires' items were referred to in this article.

Regarding attitude to condoms and response to whether “those who use condoms during sexual intercourse trust their partner or not”, 271 (30.2%) of female and 117 (22.4%) of male students completely disagreed; the difference was statistically significant (P = 0.000). Responding to “if two adolescents know each other very well, it is ok to engage in sexual intercourse without using condoms”, 312 (34.4%) of female and 123 (23.4%) of male students completely disagreed; the difference was statistically significant (P = 0.000). Regarding condom self-efficacy and response to “I can get condoms if I want to”, 267 (29.9%) of female and 317 (60.5%) of male students completely disagreed; the difference was statistically significant (P = 0.000). Responding to “I can use condoms correctly”, 172 (19.5%) of female and 272 (52.1%) of male students completely disagreed; the difference was statistically significant (P = 0.000). Regarding attitude toward sexual abstinence and response to “single males/females should not engage in sexual intercourse”, 502 (55.2%) of female and 148 (28.0%) of male students completely disagreed; the difference was statistically significant (P = 0.000). Responding to “single males/females should not be friends with one another”, 132 (14.5%) of female and 65 (12.3%) of male students completely disagreed; the difference was statistically significant (P = 0.000). Regarding abstinence self-efficacy and response to “even if my boy/girlfriend wants to engage in sexual intercourse, I can convince him/her to wait”, 417 (46.6%) of female and 101 (19.6%) of male students completely disagreed; the difference was statistically significant (P = 0.000). Responding to “even if I have sexual feelings toward my boy/girlfriend, I can abstain from engaging in sexual intercourse”, 417 (46.4%) of female and 106 (20.3%) of male students completely disagreed; the difference was statistically significant (P = 0.000). Responding to “I have control over my body and can abstain from engaging in sexual intercourse”, 411 (45.5%) of female and 113 (21.7%) of male students completely disagreed; the difference was statistically significant (P = 0.000). Other characteristics are presented in Table 2.

Adolescents’ reproductive health indicators are a set of knowledge, attitudes and behaviors that can directly or indirectly affect their reproductive health. According to the present study, only about 20% of students demonstrated favorable knowledge levels of AIDS, whereas in a study conducted by Shokouhi et al., this figure was 37%. Considering the different times at which the two studies were conducted, it appears that there has been improvement in the knowledge of adolescents in this regard. Moreover, the age limit in the study by Shokouhi et al., was 29, which differs from that of the present study, i.e. 18-24. Nevertheless, 70-80% of the Iranian youth population lack adequate knowledge about AIDS [17]. In a study conducted by Maimaiti et al., on Chinese students, 27.3% of the participants had attended lectures on AIDS educational programs. A total of 74.5% of the students had acceptable knowledge levels of AIDS, and 80% believed that AIDS can be transmitted through needle sharing and from mother to fetus. A total of 65-75% of students believed that condom prevents HIV transmission. However, inaccurate perceptions were also copious. A total of 43.2% did not know that blood test results could be negative during the first two months of developing HIV [18]. In a study in Iran, 43.4% of the youth population believed that people with HIV enjoy perfectly healthy appearances, and 23.4% and 44.9% of the population knew that AIDS can be transmitted orally and rectally, respectively [19]. Considering the insufficient knowledge of the youth on HIV/AIDS, it is recommended that courses such as “family planning” be incorporated into the general curriculum of students. In the present study, female students were believed to be at higher risk of AIDS than their male counterparts. In a study conducted on 1008 adolescents within the age bracket of 14-19, 483 had sexual relations, more than half of whom (57.6%) did not believe they were at risk of AIDS and 17.2% believed they were slightly at risk of AIDS. In addition, their knowledge of AIDS was limited [20]. The degree of perceived threat is a significant predictor of condom use in adolescents [21]. In a study conducted in Iran, it was reported that 82% of women with HIV had never used condoms [22]. The reduction in threat has been a major obstacle to condom use among Iranian youths [23]; therefore, this is an important indicator in the evaluation of reproductive health and AIDS programs. As regard the condom indicators, results showed that students' knowledge particularly that of male students was acceptable, such that two-thirds of male and half of female students had good information about condoms. However, their attitude and self-efficacy toward using them during sexual intercourse were very poor. Condoms are key elements of prevention strategies that people can use to reduce the risk of developing AIDS. Knowledge of condoms alone is not sufficient, skill and a feeling of self-efficacy are other important factors in the use of condom [24]. According to a study conducted in Iran, 16% of females and 29% of males used condoms during sexual intercourse. The low percentage of condom use is an indicator of the need to draw attention to the attitude and self-efficacy of Iranian youths in using condoms [25]. Apart from condoms and birth control pills for which students' knowledge was excellent, their knowledge of other birth control techniques, including tubal ligation and vasectomy, IUDs and hormonal methods such as contraceptive injections was acceptable. This could be due to the fact that they had taken courses on family planning at the university and so were completely familiar with these techniques. A study conducted on 215 students revealed that 81% had good knowledge of modern birth control methods [26]. It appears that students have become more knowledgeable about specific aspects of reproductive health. Knowledge of STDs is not ideal yet; therefore, reproductive health programs need to place more emphasis on this issue. In the present study, more than one-third of all students had no knowledge of any STD symptoms in women and men. In another study, it was reported that 51.6% of the youth population had heard of hepatitis, 47.7% of gonorrhea, 4.7% of genital warts and 3.9% of genital herpes. In a study by conducted by Simber et al., it was reported that 46% of the youth population had heard about gonorrhea and 40% of syphilis as STDs [27]. Coatano et al., conducted a study that was aimed at identifying university students' sexual behavior and knowledge of STDs in Sao Paulo, Brazil. Results regarding knowledge of STDs showed that 90% of students had heard about AIDS, syphilis, herpes, and gonorrhea and 69-76% were aware that genital warts could be transmitted sexually. Moreover, 30-34% and 16-23% were informed about trichomoniasis and chlamydia, respectively [28].

Regarding attitude to marriage age, the majority of female students, i.e. 153 (17.2%), believed that the perfect age for females to get married was 23-24. A total of 218 (15.5%) of male students also believed that the perfect age for females to get married was 24. The marriage age among Iranian youths has risen compared to the past two decades due to the desire of youths to study up to the university level as well as sociocultural changes such as urbanization, global revolution in family structures and economic concerns. In 2011, the most frequent and prevalent combined marriage age in Iran ranged from 25-29 years in men and 20-25 years in women. The mean marriage age in men and women was 27 and 23.4 years, respectively [10].

As regard indicators that indirectly evaluated the sexual behaviors and attitudes of youths, results showed that about two-thirds of female and male students believed that the majority of their friends had had sexual relations. Two-thirds of male and 80% of female students believed that the majority of their friends did not use condoms during sexual intercourse. One-fourth of male and 85% of female students believed that the majority of their friends had had more than one boy/girlfriend in the past 6 months. Attitude toward sexual relations including individuals’ attitude and important people in the community such as friends and parents contributes significantly to the sexual behavior of individuals. A study showed that attitude to sexual relations; in particular, perceived attitude to sexual abstinence could be the strongest predictor of sexual behavior. Consequently, parents, healthcare providers and planners need to strive toward inculcating such attitudes in individuals in order to reduce high-risk sexual behaviors [29]. In a study conducted in Iran, 24% of girls believed that a large number of their friends had boyfriends [30]. Small-scale studies in Iran have confirmed premarital sex and a strong propensity on the part of the youth population as the reason for the establishment of premarital friendships among youths [31]. More than 85% of girls and 50% of boys expressed poor self-efficacy in relation to sexual abstinence. According to a study conducted in South Delhi on 255 adolescent girls within the age bracket of 14-19, 28% of the participants believed that girls cannot keep their virginity before marriage. A total of 9% were sexually active, and 31% did not consider condom as the most efficacious technique for the prevention of AIDS and STDs. Quoting from Whitt, Mac Manus believed that attitudes, norms and motivational factors were among the essential components for achieving an understanding of why adolescents engage in high-risk sexual behaviors [32]. Reasons for premarital sex in Iran were reported to include sexual needs (40% in girls and 72.6% in boys), having a right sex partner (2.1% in girls and 24.5% in boys), and emotional needs (28.7% in girls and 4.3% in boys) [30]. Mousavi et al., studied premarital friendships from the perspective of human ecology. Results showed that in the human microsystem, individual desire, free family environment on premarital sexual behavior of adolescents and emotional needs were reasons for premarital friendships. In the human mesosystem, placement of value on premarital relations in academic environments could account for such relations. In the human exosystem, the promotion of premarital friendship culture in the media could be responsible for such relations. In addition, in the human macro-system, the influence of Western culture could also be responsible for such relations. Nevertheless, religion can play an effective role in reducing high-risk sexual behaviors [33].

In the present study, 1.2% of students underwent HIV testing and only 41.4% of them received the results. A large-scale study in Nepal showed that 20% of boys and 7% of girls who had premarital sex underwent HIV testing and received the results [34], demonstrating a significant difference between the two countries in this regard. Consequently, planning and culture-building practices seem imperative.

The results of the present study suggested that students were not comfortable to talk to a physician about sexual matters; nor were they comfortable talking about reproductive health issues with healthcare providers. This was particularly evident for male students, which may be due to the fact that the majority of adolescent reproductive health services were offered by women. A lack of gender balance in offering services may result in adolescent males hesitating to get information from health centers [35, 36].Studies in Iran indicated that adolescent males were typically less knowledgeable about reproductive health issues than females, and that the majority of adolescents were not offered prevention consultations and surveillance services particularly for risky sexual behaviors [31, 36].

The present study showed that more than two-thirds of the adolescents felt comfortable with their parents talking about health reproductive issues. In a study by Bazarganipour et al., two-thirds of the adolescents felt comfortable talking to their mothers about sexual matters [37]. According to a study conducted in South Delhi on 255 adolescent girls within the age bracket of 14-19, 48% were not comfortable talking to their parents about sexual issues and STDs [32]. However, studies showed that lack of skill and embarrassment [31] on the part of parents, and societal norms acted as socio-cultural impediments to youths in talking about sexual issues in the Iranian society [38].

In this study, 28 indicators were developed. Planning can be done to reduce factors that adversely affect the enhancement of adolescents’ reproductive and sexual health through the measurement of such indicators, including educational and service programs that provide a better access to such services for adolescents.