Table 2. Association Between Exposure Measurements and Prevalent Hypertension of Female Participants
Exposure MeasurementsAge‐AdjustedMultivariate‐Adjusteda
N (%)OR (95% CI)N (%)OR (95% CI)
Couples smoking status
Neither‐smoker3 592 690 (1.71)1.003 476 410 (1.71)1.00
Husband‐only1 419 288 (2.30)1.35 (1.33–1.36)1 379 157 (2.31)1.28 (1.27–1.30)
Wife‐only4361 (3.94)1.84 (1.58–2.15)4203 (3.88)1.53 (1.30–1.79)
Mixed11 392 (3.55)1.76 (1.60–1.95)10 972 (3.63)1.50 (1.36–1.67)
Husbands' smoking amountb
03 592 690 (1.71)1.003 476 410 (1.71)1.00
1 to 5344 356 (2.04)1.26 (1.22–1.29)333 811 (2.03)1.22 (1.19–1.25)
6 to 10618 257 (2.13)1.28 (1.26–1.31)600 548 (2.14)1.24 (1.21–1.26)
11 to 15114 818 (2.32)1.37 (1.32–1.42)111 745 (2.32)1.32 (1.26–1.37)
16 to 20318 620 (2.77)1.48 (1.45–1.52)310 371 (2.79)1.37 (1.34–1.41)
≥2123 237 (4.14)1.94 (1.81–2.07)22 682 (4.16)1.75 (1.64–1.87)
P for trend <0.0001<0.0001<0.0001<0.0001
Cumulative exposure of Spouse smokingc, d
03 807 995 (1.71)1.003 731 435 (1.71)1.00
0.1 to 2.0382 046 (2.16)1.34 (1.31–1.37)376 515 (2.15)1.23 (1.20–1.26)
2.1 to 4.0144 216 (2.87)1.49 (1.44–1.54)142 135 (2.85)1.36 (1.32–1.41)
4.1 to 6.067 739 (3.46)1.53 (1.47–1.60)66 801 (3.45)1.40 (1.35–1.47)
6.1 to 8.032 932 (4.29)1.63 (1.54–1.72)32 469 (4.29)1.50 (1.42–1.59)
>8.055 274 (6.35)1.79 (1.72–1.85)54 532 (6.35)1.63 (1.56–1.68)
P for trend <0.0001<0.0001<0.0001<0.0001
  • OR indicates odds ratio.

  • a Adjusted for age, urban inhabitants, higher school education, body mass index, and alcohol consumption.

  • b After excluding 15 753 couples from the analysis because of female active smoking, 5 011 978 couples remained in this analysis.

  • c Cumulative exposure of Spouse smoking was defined by pack‐marriage year to evaluate the cumulative exposure of spouse smoking, calculated by multiplying the number of packs of cigarettes husband smoked per day by the number of marriage duration.

  • d After excluding 15 753 couples from the analysis because of female active smoking and 621 776 couples missing marriage duration, 4 390 202 couples remained in this analysis.