Table 2.

Association of frequency of sauna bathing and risk of psychosis

Frequency of sauna bathing (sessions per week)	Model 1		Model 2		Model 3		Model 4
	HR (95% CI)	p value	HR (95% CI)	p value	HR (95% CI)	p value	HR (95% CI)	p value
Once	ref		ref		ref		ref
2–3	0.76 (0.56–1.03)	0.082	0.78 (0.57–1.06)	0.113	0.80 (0.59–1.09)	0.158	0.81 (0.59–1.11)	0.190
4–7	0.23 (0.09–0.58)	0.002	0.21 (0.08–0.52)	0.001	0.22 (0.09–0.54)	0.001	0.23 (0.09–0.57)	0.002

CI, confidence interval; HR, hazard ratio; ref, reference; Model 1, adjusted for age; Model 2, model 1 plus body mass index, smoking status, history of diabetes, prevalent coronary heart disease, years of education, total cholesterol, and alcohol consumption; Model 3, model 2 plus total energy intake, socioeconomic status, physical activity, and high-sensitivity C-reactive protein; Model 4, model 3 plus duration of a single sauna session and temperature of sauna bath.