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Table 3 The odds of having high blood pressure depending on duration of hormonal contraception use compared to never use, stratified by current age

From: Past oral contraceptive use and self-reported high blood pressure in postmenopausal women

Current age HC use n % HBP OR (99% CI) P value
<58 years Never 1411 8.9 1.0  
  <5 years 2677 9.7 1.0 (0.7 to 1.4) 0.99
  5 to 10 years 3903 10.8 1.2 (0.9 to 1.6) 0.24
  >10 years 4067 11.0 1.2 (0.9 to 1.6) 0.22
58 to 66 years Never 1586 20.7 1.0  
  <5 years 2930 18.7 0.9 (0.7 to 1.1) 0.05
  5 to 10 years 3636 19.7 0.9 (0.7 to 1.1) 0.17
  >10 years 2647 20.4 0.9 (0.8 to 1.2) 0.42
≥67 years Never 5512 33.2 1.0  
  <5 years 1817 33.9 1.0 (0.8 to 1.1) 0.38
  5 to 10 years 2169 33.7 0.9 (0.8 to 1.1) 0.23
  >10 years 1934 32.5 0.9 (0.8 to 1.0) 0.04
  1. HBP = High Blood Pressure; OR = Odds Ratio; CI = Confidence Interval. Adjusted for income, country of origin, BMI, smoking, alcohol, exercise, family history of high blood pressure, menopausal hormone therapy use, number of children, whether they breastfed, and age of menopause.