Table 5 Multivariate logistic regression analysis

High blood CRP

< 0.001

12.354

1.351–42.873

High blood ALB

0.032

0.937

0.850–0.984

High blood Hb

0.027

0.924

0.819–0.973

Low educational level (junior high school or lower)

0.009

5.181

1.514–15.379

Preference for spicy food

0.029

4.563

1.473–12.819

Irregular diet

0.012

5.018

1.419–11.328

Unstable employment (including working as a farmer)

0.017

4.933

1.152–8.583

Low annual household income

0.038

4.133

1.378–9.572

Unfavorable humidity (too low)

0.021

3.970

1.182–5.637

Unfavorable humidity (too high)

0.015

2.951

1.257–6.782

Poor fluid exchange conditions

0.019

3.572

1.311–7.458