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Table 3 Added risk of hospitalization for CKD associated with heatwave days by three temperature zones, age, sex, and etiologies of CKD

From: Heat exposure and hospitalizations for chronic kidney disease in China: a nationwide time series study in 261 major Chinese cities

Variable

RR (95% CI)

P-values for difference

Overall

1.116 (1.069–1.166)

–

Temperature zone

  

 Temperate zone

0.978 (0.828–1.155)

Ref

 Warm-temperate zone

1.216 (1.092–1.355)

0.031

 Subtropical zone

1.104 (1.050–1.161)

0.172

Age (years)

  

 18–40

1.228 (1.126–1.339)

Ref

 40–60

1.184 (1.110–1.262)

0.507

  ≥ 60

1.082 (1.014–1.154)

0.022

Sex

  

 Male

1.157 (1.093–1.224)

Ref

 Female

1.109 (1.044–1.178)

0.316

Etiology of CKD

  

 Diabetic kidney disease

1.170 (1.043–1.311)

Ref

 Hypertensive nephropathy

1.187 (1.058–1.331)

0.861

 Glomerulonephritis

1.170 (1.082–1.265)

 > 0.999

 Obstructive nephropathy

1.258 (1.158–1.367)

0.314

  1. CKD chronic kidney disease, CI confidence interval, Ref reference, RR relative risk
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Military Medical Research

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