Table 3

The distribution of DTR-related attributable fraction (AF) (%, 95% eCI) and attributable number (AN) (95% eCI) in various subgroups of first-ever stroke in the summer and winter

VariablesSummerWinter
AF (%, 95% eCI)AN (95% eCI)AF (%, 95% eCI)AN (95% eCI)
Total stroke3.65* (1.81 to 5.53)1276 (622 to 1880)2.42 (0.05 to 4.42)823 (−80 to 1529)
Gender
 Male3.90 (1.81 to 5.71)832 (420 to 1227)1.85 (−0.89 to 4.18)384 (−121 to 866)
 Female3.23 (0.73 to 5.45)438 (103 to 750)2.63 (−0.41 to 5.34)353 (−44 to 688)
Age (years)
 <401.79 (−2.40 to 5.46)52 (−74 to 159)1.85 (−3.40 to 6.34)48 (−76 to 162)
 40–643.59 (1.66 to 5.45)636 (260 to 972)2.74 (0.31 to 4.75)460 (49 to 854)
 ≥654.06 (1.56 to 6.52)581 (228 to 899)1.56 (−1.64 to 4.33)230 (−224 to 636)
Education
 Primary and below4.13 (1.32 to 6.66)473 (173 to 755)4.07 (1.22 to 6.70)451 (114 to 757)
 Junior high school4.26 (1.78 to 6.55)578 (239 to 900)2.17 (−1.10 to 4.77)299 (−119 to 675)
 Senior high school and above2.42 (0.13 to 4.52)240 (9 to 446)0.11 (−2.63 to 2.75)10 (−262 to 256)
Disease category
 CBI4.27 (2.26 to 6.10)1127 (570 to 1616)2.63 (0.08 to 5.08)630 (−28 to 1232)
 ICH1.47 (-1.50 to 3.99)99 (-90 to 283)1.15 (−2.05 to 3.96)96 (-164 to 328)
  • *p<0.01, the differences of AF between subpopulations were tested by the Cochran’s Q test.

  • CBI, cerebral infarction; DTR, diurnal temperature range; eCI, empirical CI; ICH, intracerebral haemorrhage.