Table 3. Subgroup Analyses on Associations Between Husband Smoking and Prevalent Hypertension Among Females
SubgroupNeither‐SmokerHusband‐OnlyMultivariate‐Adjusted ORa (95% CI)
No. of ParticipantsNo. of Hypertension (%)No. of ParticipantsNo. of Hypertension (%)
Age, y
20 to 241 317 25516 512 (1.25)496 2257551 (1.52)1.16 (1.13–1.19)
25 to 291 338 74919 750 (1.48)463 8248929 (1.93)1.21 (1.18–1.24)
30 to 34447 92510 477 (2.34)163 5275181 (3.17)1.25 (1.20–1.29)
35 to 39156 9245967 (3.80)60 4973207 (5.30)1.29 (1.23–1.35)
≥4060 1043630 (6.04)23 8462123 (8.90)1.37 (1.29–1.45)
Second‐hand smoking, minutes per day
03 256 82554 743 (1.68)1 080 78723 117 (2.14)1.22 (1.20–1.24)
1 to 1543 930991 (2.26)75 5782040 (2.63)1.12 (1.03–1.21)
≥1620 202602 (2.98)49 5541834 (3.70)1.20 (1.09–1.32)
Higher school education
Yes1 134 54217 132 (1.50)447 1198543 (1.91)1.21 (1.18–1.24)
No2 341 86842 219 (1.80)932 03823 247 (2.49)1.32 (1.29–1.34)
Urban inhabitants
Yes265 1285167 (1.95)114 3622939 (2.57)1.22 (1.16–1.27)
No3 211 28254 184 (1.69)1 264 79528 851 (2.28)1.29 (1.27–1.31)
Drinking
Yes76 2681660 (2.18)76 2681660 (2.18)1.17 (1.09–1.25)
No3 400 14257 691 (1.70)1 318 46530 148 (2.29)1.29 (1.27–1.31)
BMI categoryb
Underweight425 2124918 (1.16)200 7082748 (1.37)1.17 (1.12–1.23)
Normal weight2 501 46033 159 (1.33)928 72515 872 (1.72)1.29 (1.26–1.31)
Overweight444 28013 795 (3.11)198 7258237 (4.14)1.33 (1.29–1.36)
Obesity105 4587479 (7.09)54 9994933 (8.97)1.28 (1.24–1.33)
  • BMI indicates body mass index; OR, odds ratio.

  • a Adjusted for age, urban inhabitants, higher school education, BMI, and alcohol consumption.

  • b Females with BMI ≤18.0, 18.0 to 23.9, 24.0 to 27.9, and ≥28.0 kg/m2 were defined as underweight, normal weight, overweight, and obese.