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Fulltext Effects of short duration stress management training on self-perceived depression, anxiety and stress in male automotive assembly workers: a quasi-experimental study

Edimansyah B, Rusli B, Naing L

J Occup Med Toxicol, 2008;3:28.
PMID: 19021918 DOI: 10.1186/1745-6673-3-28

To examine the effects of short duration stress management training (SMT) on self-perceived depression, anxiety and stress in male automotive assembly workers, 118 male automotive workers from Pekan, Pahang (n = 60, mean age = 40.0 years, SD = 6.67) and Kota Bharu, Kelantan (n = 58, mean age = 38.1 years, SD = 5.86) were assigned to experimental and control group, respectively. A SMT program consisting of aerobic exercise, stress management manual, video session, lecture, question and answer session, and pamphlet and poster session were conducted in the experimental group. A validated short-form Malay version of the Depression Anxiety Stress Scales (DASS-21) were self-administered before and after the intervention program in the experimental and control group and their time and group interaction effects were examined using the repeated measure ANOVA test. Results indicated that the mean (SD) scores for DASS-Depression (p = 0.036) and DASS-Anxiety (p = 0.011) were significantly decreased, respectively, after the intervention program in the experimental group as compared to the control group (significant time-group interaction effects). No similar effect was observed for the mean (SD) scores for DASS-Stress (p = 0.104). However, the mean (SD) scores for subscales of DASS-Depression (Dysphoria, p = 0.01), DASS-Anxiety (Subjective Anxiety, p = 0.007, Situational Anxiety, p = 0.048), and DASS-Stress (Nervous Arousal, p = 0.018, Easily Upset, p = 0.047) showed significant time and group interaction effects. These findings suggest that short duration SMT is effective in reducing some aspects of self-perceived depression, anxiety and stress in male automotive workers.
Fulltext Working conditions, self-perceived stress, anxiety, depression and quality of life: a structural equation modelling approach

Rusli BN, Edimansyah BA, Naing L

BMC Public Health, 2008 Feb 06;8:48.
PMID: 18254966 DOI: 10.1186/1471-2458-8-48

BACKGROUND: The relationships between working conditions [job demand, job control and social support]; stress, anxiety, and depression; and perceived quality of life factors [physical health, psychological wellbeing, social relationships and environmental conditions] were assessed using a sample of 698 male automotive assembly workers in Malaysia.
METHODS: The validated Malay version of the Job Content Questionnaire (JCQ), Depression Anxiety Stress Scales (DASS) and the World Health Organization Quality of Life-Brief (WHOQOL-BREF) were used. A structural equation modelling (SEM) analysis was applied to test the structural relationships of the model using AMOS version 6.0, with the maximum likelihood ratio as the method of estimation.
RESULTS: The results of the SEM supported the hypothesized structural model (chi2 = 22.801, df = 19, p = 0.246). The final model shows that social support (JCQ) was directly related to all 4 factors of the WHOQOL-BREF and inversely related to depression and stress (DASS). Job demand (JCQ) was directly related to stress (DASS) and inversely related to the environmental conditions (WHOQOL-BREF). Job control (JCQ) was directly related to social relationships (WHOQOL-BREF). Stress (DASS) was directly related to anxiety and depression (DASS) and inversely related to physical health, environment conditions and social relationships (WHOQOL-BREF). Anxiety (DASS) was directly related to depression (DASS) and inversely related to physical health (WHOQOL-BREF). Depression (DASS) was inversely related to the psychological wellbeing (WHOQOL-BREF). Finally, stress, anxiety and depression (DASS) mediate the relationships between job demand and social support (JCQ) to the 4 factors of WHOQOL-BREF.
CONCLUSION: These findings suggest that higher social support increases the self-reported quality of life of these workers. Higher job control increases the social relationships, whilst higher job demand increases the self-perceived stress and decreases the self-perceived quality of life related to environmental factors. The mediating role of depression, anxiety and stress on the relationship between working conditions and perceived quality of life in automotive workers should be taken into account in managing stress amongst these workers.
Reliability and construct validity of the Malay version of the Job Content Questionnaire (JCQ)

Edimansyah BA, Rusli BN, Naing L, Mazalisah M

Southeast Asian J. Trop. Med. Public Health, 2006 Mar;37(2):412-6.
PMID: 17125008

The JCQ has been shown to be a valid and reliable instrument to assess job stress in many occupational settings worldwide. In Malaysia, both the English and validated Malay versions have been employed in studies of medical professionals and laboratory technicians, respectively. The present study assessed the reliability and construct validity of the Malay version of the JCQ among automotive workers in Malaysia. Fifty workers of a major automotive manufacturer in Kota Bharu, Kelantan consented to participate in the study and were administered the Malay version of the JCQ. Translation (English-Malay) and back translation (Malay-English) of the JCQ was made to ensure the face validity of the questionnaire. Reliability was determined using Cronbach's alpha for internal consistency, whilst construct validity was assessed using exploratory factor analysis (principal component with varimax rotation). The results indicate that the Cronbach's alpha coefficients were acceptable for decision latitude (job control or decision authority) (0.74) and social support (0.79); however, it was slightly lower for psychological job demand (0.61). Exploratory factor analysis showed 3 meaningful common factors that could explain the 3 theoretical dimensions or constructs of Karasek's demand-control-social support model. In conclusion, the results of the validation study suggested that the JCQ scales are reliable and valid for assessing job stress in a population working in the automotive industry. Further analyses are necessary to evaluate the stability and concurrent validity of the JCQ.
Indoor air quality in an automotive assembly plant in Selangor, Malaysia

Edimansyah BA, Rusli BN, Naing L, Azwan BA, Aziah BD

Southeast Asian J. Trop. Med. Public Health, 2009 Jan;40(1):187-92.
PMID: 19323052

The purpose of this study was to determine the indoor air quality (IAQ) status of an automotive assembly plant in Rawang, Selangor, Malaysia using selected IAQ parameters, such as carbon dioxide (CO2), carbon monoxide (CO), temperature, relative humidity (RH) and respirable particulate matter (PM10). A cross-sectional study was conducted in the paint shop and body shop sections of the plant in March 2005. The Q-TRAK Plus IAQ Monitor was used to record the patterns of CO, CO2, RH and temperature; whilst PM10 was measured using DUSTTRAK Aerosol Monitor over an 8-hour time weight average (8-TWA). It was found that the average temperatures, RH and PM10 in the paint shop section and body shop sections exceeded the Department of Safety and Health (DOSH) standards. The average concentrations of RH and CO were slightly higher in the body shop section than in the paint shop section, while the average concentrations of temperature and CO2 were slightly higher in the paint shop section than in the body shop section. There was no difference in the average concentrations of PM10 between the two sections.
Self-perceived depression, anxiety, stress and their relationships with psychosocial job factors in male automotive assembly workers

Edimansyah BA, Rusli BN, Naing L, Mohamed Rusli BA, Winn T, Tengku Mohamed Ariff BR

Ind Health, 2008 Jan;46(1):90-100.
PMID: 18270454

Depression, anxiety and stress have been recognized as important mental outcome measures in stressful working settings. The present study explores the prevalence of self-perceived depression, anxiety and stress; and their relationships with psychosocial job factors. A cross-sectional study involving 728 male automotive assembly workers was conducted in two major automotive assembly plants in Malaysia using the validated Malay versions of the Depression Anxiety Stress Scales (DASS) and Job Content Questionnaire (JCQ). Based on the DASS cut-off of > or =78 percentile scores, the prevalence of self-perceived depression, anxiety and stress was 35.4%, 47.2% and 31.1%, respectively. Four (0.5%), 29 (4.0%) and 2 (0.3%) workers, respectively, reported extremely severe self-perceived depression, anxiety and stress. Multiple linear regression analyses, controlling for age, education, salary, duration of work and marital status, revealed that psychological job demand, job insecurity and hazardous condition were positively associated with DASS-Depression, DASS-Anxiety and DASS-Stress; supervisor support was inversely associated with DASS-Depression and DASS-Stress. We suggest that reducing psychological job demand, job insecurity and hazardous condition factors may improve the self-perceived depression, anxiety and stress in male automotive assembly workers. Supervisor support is protective for self-perceived depression and stress.
Relationship of psychosocial work factors and health-related quality of life in male automotive assembly workers in Malaysia

Edimansyah BA, Rusli BN, Naing L, Mohamed Rusli BA, Winn T

Ind Health, 2007 Jun;45(3):437-48.
PMID: 17634693

The present study investigates the relationship between psychosocial work factors and health-related quality of life (HRQOL) in male automotive assembly plant workers in Malaysia.
MATERIALS AND METHODS: A total of 728 male workers were recruited in March-July 2005 from 2 major automotive assembly plants in Selangor and Pahang. In this cross-sectional study, information on socio-demography, psychosocial work factors using the 97-item Job Content Questionnaire (JCQ) and an abbreviated 26-item version of the World Health Organization Quality of Life-Brief Version (WHOQOL-BREF) questionnaire containing 4 domains (physical health, psychological, social relationship, and environment) was self-administered to all workers involved.
RESULTS AND CONCLUSION: The prevalence of reported good or very good overall HRQOL and general health was 64.9% and 53.7%, respectively. Multiple linear regression analysis indicated that created skill was positively associated with physical health and psychological domains; whilst, skill discretion was positively associated with social relationship and environment domains. Social support was positively associated with physical health and environment domains; whilst, co-worker support was positively associated with psychological and social relationship domains. Job insecurity and hazardous condition were negatively associated with all domains, whilst psychological job demands was negatively associated with the environment domain of HRQOL.