Table 3 Weighted distributions of blood pressure-related variables by duration of oral contraceptive use
Characteristics | Overall | Duration of oral contraceptive use | p for trend | |||
|---|---|---|---|---|---|---|
Never (n = 2844) | <0– < 12 mo (n = 304) | 12–24 mo (n = 132) | >24 mo (n = 76) | |||
Blood pressure (mm Hg), mean (95% CI)* | ||||||
Systolic | 111.7 (110.7–112.6) | 111.4 (110.4–112.4) | 111.1 (109.2–112.9) | 114.8 (111.0–118.7) | 117.2 (113.4–121.0) | <0.001 |
Diastolic | 74.2 (73.6–74.8) | 74.0 (73.3–74.6) | 74.2 (72.9–75.4) | 76.9 (74.5–79.4) | 77.8 (75.1–80.5) | <0.001 |
Prevalence,% | ||||||
Hypertensive | 14.7 | 14.3 | 13.9 | 21.3 | 22.8 | 0.006 |
Prehypertensive | 21.3 | 21.1 | 21.0 | 19.2 | 34.3 | 0.017 |
Prehypertensive or Hypertensive | 36.0 | 35.4 | 34.9 | 40.5 | 57.2 | <0.001 |