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. 2018 Nov 29;16:219. doi: 10.1186/s12916-018-1198-0

Fig. 5.

Fig. 5

Association of the frequency of sauna bathing with cardiovascular mortality in clinically relevant subgroups. CHD, coronary heart disease; CI, confidence interval; HDL-C, high-density lipoprotein cholesterol; HR, hazard ratio; LDL-C, low-density lipoprotein cholesterol; PA, physical activity. HRs are adjusted for age, gender, body mass index, smoking, systolic blood pressure, serum low-density lipoprotein cholesterol, alcohol consumption, previous myocardial infarction, and type 2 diabetes; hazard ratios are reported comparing four to seven sauna sessions per week with one sauna session per week. * P-value for meta-regression