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Determinants of workplace injury among Thai Cohort Study participants

Janneke Berecki-Gisolf et al. BMJ Open. .

Abstract

Objectives: To explore individual determinants of workplace injury among Thai workers.

Design: Cross-sectional analysis of a large national cohort.

Setting: Thailand.

Participants: Thai Cohort Study participants who responded to the 2009 follow-up survey were included if they reported doing paid work or being self-employed (n=51 751).

Outcome measures: Self-reported injury incidence over the past 12 months was calculated. Multivariate logistic regression models were used to test associations between individual determinants and self-reported workplace injury.

Results: Workplace injuries were reported by 1317 study participants (2.5%); the incidence was 34 (95% CI 32 to 36)/1000 worker-years for men, and 18 (17-20) for women. Among men working ≥41 h and earning <10 000 Baht, the injury rate was four times higher compared with men working <11 h and earning ≥20 001 Baht; differences in injury rates were less pronounced in women. Multivariate modelling showed that working ≥49 h/week (23%) and working for ≤10 000 Bath/month (37%) were associated with workplace injury. The increase in injury risk with increased working hours did not exceed the risk expected from increased exposure.

Conclusions: Reductions in occupational injury rates could be achieved by limiting working hours to 48/week. Particularly for Thai low wage earners and those with longer workdays, there is a need for effective injury preventive programmes.

Keywords: EPIDEMIOLOGY; OCCUPATIONAL & INDUSTRIAL MEDICINE; PUBLIC HEALTH.

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Figures

Figure 1
Figure 1
Inclusions and exclusions of study sample. Only those reporting work hours were included: 42 884 were doing paid work only; 3662 were self-employed, 5201 were both self-employed and doing paid work and 4 reported a work disability as well as a recent workplace injury.
Figure 2
Figure 2
Incidence of workplace injury by monthly income.
Figure 3
Figure 3
Incidence of workplace injury by weekly working hours.
See this image and copyright information in PMC

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