Table 4.
Odds ratios and 95% confidence intervals for hypertension and prehypertension by duration of oral contraceptive use
|
Duration of oral contraceptive use |
p for linear trend | ||||
|---|---|---|---|---|---|
| Never (n = 2844) | <0– < 12 mo (n = 304) | 12–24 mo (n = 132) | >24 mo (n = 76) | ||
|
Hypertension |
|
|
|
|
|
| Crude |
1.00 (reference) |
0.97 (0.65–1.43) |
1.63 (1.05–2.52) |
2.42 (1.43–4.09) |
<0.001 |
| Adjusted* |
1.00 (reference) |
0.99 (0.65–1.51) |
1.22 (0.75–1.99) |
1.96 (1.03–3.73) |
0.012 |
|
Prehypertension |
|
|
|
|
|
| Crude |
1.00 (reference) |
0.99 (0.68–1.43) |
0.99 (0.64–1.53) |
2.46 (1.44–4.19) |
0.001 |
| Adjusted* |
1.00 (reference) |
1.00 (0.68–1.48) |
0.86 (0.56–1.34) |
2.23 (1.28–3.90) |
0.010 |
|
Prehypertension or Hypertension |
|
|
|
|
|
| Crude |
1.00 (reference) |
0.98 (0.71–1.34) |
1.24 (0.90–1.73) |
2.44 (1.63–3.66) |
<0.001 |
| Adjusted* | 1.00 (reference) | 1.02 (0.72–1.43) | 0.97 (0.68–1.38) | 2.13 (1.37–3.32) | 0.005 |
*Adjusted for age, BMI, education, income, exercise, cigarette smoking, and alcohol consumption.