Table 4.

Stratified odds ratios revealing interaction of demographic and work-related variables with the association between overall health, psychological distress, and occupational heat stress (n=40,913)

		Poor overall health		Psychological distress
Variables	Heat stress (n)a	ORb	95% CI	ORb	95% CI
Sex
Males	4,081	1.40**	1.17–1.69	1.95**	1.72–2.22
Females	3,395	1.55**	1.35–1.79	1.78**	1.59–1.99
Age group
15–29	3,906	1.38**	1.18–1.60	1.80**	1.62–2.01
30–44	3,234	1.57**	1.31–1.87	1.86**	1.62–2.14
>45	336	1.83*	1.05–3.18	2.35*	1.42–3.88
Education
University	1,867	1.94**	1.58–2.37	2.04**	1.73–2.40
Diploma	2,240	1.26*	1.02–1.55	1.85**	1.60–2.15
High school	3,369	1.38*	1.15–1.66	1.70**	1.48–1.94
Income
20,001+	563	1.76*	1.20–2.57	1.99**	1.42–2.77
10,001–20,000	2,214	1.55**	1.24–1.92	1.74**	1.47–2.06
7,001–10,000	2,215	1.39*	1.13–1.72	1.71**	1.47–2.00
<7,000	2,484	1.46**	1.20–1.77	1.99**	1.73–2.28
Complaint effect
No other complaints	3,324	1.75**	1.49–2.06	2.21**	1.96–2.49
Scored 1–2 items with ‘often’	3,070	1.33*	1.12–1.58	1.54**	1.36–1.75
Scored 3–5 items with ‘often’	1,082	1.22*	0.87–1.71	1.80**	1.39–2.32
Job location
Bangkok	1,133	1.36*	1.06–1.76	1.88**	1.55–2.29
Urban	3,089	1.49**	1.25–1.77	1.75**	1.54–2.00
Rural	3,254	1.53**	1.27–1.84	1.90**	1.66–2.18
Job typec
Physical	420	1.91*	1.21–3.00	1.87*	1.30–2.68
Office	2,338	1.79**	1.48–2.15	2.24**	1.94–2.58
Job location/typec
Bangkok/office	251	2.41**	1.52–3.80	2.62**	1.84–3.74
Bangkok/physical	58	0.91	0.25–3.18	1.10	0.36–3.38
Urban/office	945	1.84**	1.37–2.45	2.04**	1.62–2.56
Urban/physical	150	2.32*	1.13–4.75	1.41	0.75–2.65
Rural/office	1,142	1.55*	1.15–2.07	2.35**	1.90–2.90
Rural/physical	212	2.15*	1.08–4.28	2.49**	1.50–4.11

^aNumber of respondents who reported heat stress at work (see Section ‘Methods’).

^bOdds ratios show within-strata estimates for heat stress associations adjusted for all other explanatory variables.

^cJob type analysis restricted to 24,907 respondents (see ‘Methods’).

^* P<0.05;

^** P<0.001.