Table 2

HR and 95% CI per 1°C increase of seasonal temperature variability on incident respiratory diseases in the prospective Chinese elderly cohort in Hong Kong

Incident diseasesCasesSummertime temperature variabilityWintertime temperature variability
Basic model*Full model†Basic model*Full model†
Total respiratory diseases12 6891.12 (0.91 to 1.39)1.02 (0.80 to 1.29)1.50 (1.39 to 1.62)1.20 (1.08 to1.32)
 Pneumonia66721.06 (0.78 to 1.43)1.04 (0.75 to 1.44)1.31 (1.18 to 1.46)1.15 (1.01 to 1.31)
 COPD30751.14 (0.75 to 1.74)1.05 (0.65 to 1.69)1.96 (1.67 to 2.30)1.41 (1.15 to 1.71)
  • *Stratified by age in years, adjusting for sex and year of follow-up and summertime temperature variability and wintertime temperature variability were mutually adjusted.

  • †Additionally adjusted for yearly mean temperature, marital status, housing type, BMI, education attainment, personal monthly expenditure, physical activity, medication taken, smoking status, social deprivation index and smoking rate at the district level.

  • BMI, body mass index.