Table 2: Characterization of the articles included in the sample and rescued by PubMed, 2015.

Author
Year/Country
Study Design/objective Sample
(♀/♂)
Intervention/
Statistical analyses
Main Results
Mental health associated with the work process
Sharif et al., 2013
Iran
Randomized controlled clinical trial.
Determine the effect of emotional intelligence education in general health of nurses in a intensive care unit.
52a Workshop for two consecutive days.
T-test, chi-square, ANOVA
The Nurses who had emotional intelligence training showed significant improvement in their overall health and faced numerous occupational stressors with more skill and flexibility.
Emotional intelligence plays a mediating role between mental health and stress. Thus, people with higher emotional intelligence can better deal with environmental conflicts.
Uchiyama et al. 2013
Japan
Randomized controlled clinical trial.
To investigate the effect on the mental health of a participatory intervention six months to improve the psychosocial work environment.
434
(430/4)
Group of work.
t-test, chi-square, Fisher´s test, ANCOVA
.
The intervention group showed an increase in participatory management, job control and support co-worker, while the control group showed a decrease in the goals. Improved involvement in labor activities in both groups.
Nearly all the psychosocial factors in the post-intervention were more favorable in the intervention group than in the control group. There was no statistical difference in skills development.
Arimura et al. 2010
Japan
Cross-sectional descriptive study with a quantitative approach.
Examine the relationship
between shift work, mental status and errors committed by nurses.
454
(420/34)
Sample was divided into two groups, one involving self-report in error and another that never err.
Univariate and multiple logistic analyses, chi-square, t-test,
The errors were associated with sleep problems and deteriorating mental health in Japanese nurses.
In addition, reduced hours of sleep and low GHQ scores were related to errors in work activities.
Taghinejad et al.
2014
Iran
Cross-sectional study, descriptive-exploratory.
Investigate and assess the mental health of nurses under the focus of anxiety, social function and depression.
86
(50/36)
Without Intervention.
Chi-square, t-test, Cronbach’s alpha, test-retest
43.2% of the participants showed signs of mental disorders; 12.3% physical symptoms, anxiety symptoms by 16%, 42% and 6.2% social dysfunction symptoms of depression.
Changes in mental health status were more related to social dysfunction than depression.
Showed high prevalence of depression, anxiety and symptoms of stress among nurses.
Urbanetto et al.
2013
Brasil
Cross-sectional study, descriptive and exploratory, with a quantitative approach
To evaluate the association between stress at work and
the occurrence of Psychic Disorder Minor
(DPM) in nursing workers.
335a
practical nurse
(245)
nursing assistant
(35)
nurse (55)
Without Intervention.
Chi-square, Stepwise logistic regression, with odds ratio
Prevalence of 20.6% for DPM, being related to stress at work.
The reports were nervous, worried, tense, depressed-anxious mood, frequent headaches, problems with sleep.
Stress affects the workers' mental health, being related to high psychological demands and high control the work process of the nursing team.
El Kiss et al.
2014
Tunisia
Cross-sectional study, descriptive and exploratory.
To determine the prevalence of major depressive episodes (MDE), dysthymia and generalized anxiety disorder (GAD) and its associated factors.
228
(126/102)
Without Intervention.
Chi-square test, t-test, Fisher’s test
Prevalence of depressive disorders was 7.5% for EDM and 5.7% for dysthymia, where the associated factors were female and the distance from the workplace.
The prevalence of GAD (4.4%) was associated with distance from the workplace, personal history of mental illness and satisfaction with own financial income.
Kikuchi et al.
2010
Japan
Descriptive study.
To verify the relationship between effort-reward imbalance (ERI), depression and anxiety.
406a Without Intervention.
Chi-square test, t-test, Stepwise logistic regression, with odds ratio
Imbalance effort-reward group of nurses with depression and anxiety were significantly higher. Depression and anxiety were associated with high rate of benefit-effort, high score for excessive involvement.
Ghazavi et al.
2010
Iran
Almost experimental study.
Determine the effect of communication skills training for psychoeducation method on the level of stress in psychiatric wards of nurses in 2010.
45
(35/10)
Training of communication skills.
T-test and ANOVA
Improved communication with patients and reflected on their attitudes, reducing occupational stress and improving your mental health. Recommends that in service training with the emphasis on training nurses communication skills should be offered every 12 months.

aDid not report the sex of nursing professionals who participated in the study.