Table 4.
Predictors of Bleeding Heaviness, Right from the Start, 2000–2008 (n=4539).
| Unadjusted model |
Adjusted model* |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No bleeding |
Spotting/Light Bleeding |
Heavy Bleeding |
Spotting/Light Bleeding |
Heavy Bleeding |
||||||||||
| n | OR | n | OR | 95% CI | n | OR | 95% CI | p | OR | 95% CI | OR | 95% CI | p | |
| Age | <0.01 | 0.01 | ||||||||||||
| 18–27 years | 1367 | 1.0 | 372 | 1.0 | 40 | 1.0 | 1.0 | 1.0 | ||||||
| 28–34 years | 1462 | 1.0 | 570 | 1.4 | 1.2, 1.7 | 45 | 1.1 | 0.7, 1.6 | 1.4 | 1.14, 1.61 | 1.1 | 0.7, 1.9 | ||
| 35–45 years | 482 | 1.0 | 167 | 1.3 | 1.0, 1.6 | 12 | 0.9 | 0.5, 1.7 | 1.2 | 0.91, 1.47 | 0.8 | 0.4, 1.6 | ||
| Education | <0.01 | 0.20 | ||||||||||||
| ≤High school | 693 | 1.0 | 173 | 1.0 | 25 | 1.0 | 1.0 | 1.0 | ||||||
| Some college | 601 | 1.0 | 197 | 1.3 | 1.1, 1.7 | 21 | 1.0 | 0.5, 1.8 | 1.2 | 0.95, 1.53 | 1.0 | 0.5, 1.8 | ||
| College or more | 2016 | 1.0 | 739 | 1.5 | 1.2, 1.8 | 51 | 0.7 | 0.4, 1.1 | 1.3 | 1.02, 1.57 | 0.8 | 0.4, 1.4 | ||
| Cycle length | <0.01 | <0.01 | ||||||||||||
| <27 days | 457 | 1.0 | 195 | 1.3 | 1.1, 1.6 | 15 | 1.3 | 0.8, 2.2 | 1.4 | 1.14, 1.67 | 1.3 | 0.8, 2.2 | ||
| 27–33 days | 2085 | 1.0 | 651 | 1.0 | 55 | 1.0 | 1.0 | 1.0 | ||||||
| ≥34 days | 217 | 1.0 | 89 | 1.3 | 1.0, 1.8 | 5 | 1.1 | 0.4, 2.7 | 1.3 | 1.01, 1.77 | 1.2 | 0.5, 3.0 | ||
| Infection | 0.24 | 0.18 | ||||||||||||
| No | 2542 | 1.0 | 831 | 1.0 | 69 | 1.0 | 1.0 | 1.0 | ||||||
| Yes | 769 | 1.0 | 278 | 1.1 | 0.9, 1.3 | 28 | 1.3 | 0.9, 2.1 | 1.2 | 0.99, 1.36 | 1.2 | 0.8, 1.9 | ||
| Fibroids | <0.01 | 0.07 | ||||||||||||
| No | 2765 | 1.0 | 895 | 1.0 | 73 | 1.0 | 1.0 | 1.0 | ||||||
| Yes | 316 | 1.0 | 143 | 1.4 | 1.1, 1.7 | 13 | 1.5 | 0.8, 2.7 | 1.2 | 1.00, 1.54 | 1.5 | 0.8, 2.9 | ||
| Diabetes | 0.27 | 0.19 | ||||||||||||
| None | 3218 | 1.0 | 1070 | 1.0 | 92 | 1.0 | 1.0 | 1.0 | ||||||
| Prior diabetes | 93 | 1.0 | 39 | 1.3 | 0.9, 1.8 | 5 | 1.9 | 0.8, 4.7 | 1.4 | 0.93, 2.02 | 1.8 | 0.7, 4.6 | ||
| Parity | <0.01 | <0.01 | ||||||||||||
| ≥1 live birth | 1752 | 1.0 | 530 | 1.0 | 56 | 1.0 | 1.0 | 1.00 | ||||||
| Nulliparous | 1496 | 1.0 | 567 | 1.3 | 1.1, 1.5 | 40 | 0.9 | 0.6, 1.3 | 1.4 | 1.18, 1.59 | 0.9 | 0.6, 1.4 | ||
| Miscarriage history | 0.02 | 0.01 | ||||||||||||
| None | 2552 | 1.0 | 831 | 1.0 | 64 | 1.0 | 1.0 | 1.0 | ||||||
| One | 564 | 1.0 | 207 | 1.1 | 0.9, 1.3 | 24 | 1.7 | 1.0, 2.7 | 1.2 | 0.98, 1.40 | 1.6 | 1.0, 2.7 | ||
| Two or more | 132 | 1.0 | 59 | 1.4 | 1.0, 1.9 | 8 | 2.5 | 1.2, 5.2 | 1.5 | 1.02, 2.04 | 2.5 | 1.1, 5.4 | ||
| Induced abortion history | <0.01 | <0.01 | ||||||||||||
| None | 2757 | 1.0 | 880 | 1.0 | 79 | 1.0 | 1.0 | 1.0 | ||||||
| One or more | 491 | 1.0 | 217 | 1.4 | 1.2, 1.7 | 17 | 1.2 | 0.7, 2.1 | 1.4 | 1.18, 1.71 | 1.0 | 0.6, 1.8 | ||
| Smoking | 0.01 | 0.12 | ||||||||||||
| No | 2876 | 1.0 | 989 | 1.0 | 77 | 1.0 | 1.0 | 1.0 | ||||||
| Yes | 435 | 1.0 | 120 | 0.8 | 0.6, 1.0 | 20 | 1.7 | 1.0, 2.8 | 0.8 | 0.66, 1.05 | 1.4 | 0.8, 2.5 | ||
| Alcohol exposure | 0.14 | 0.09 | ||||||||||||
| No | 1483 | 1.0 | 483 | 1.0 | 34 | 1.0 | 1.0 | 1.0 | ||||||
| Yes | 1826 | 1.0 | 625 | 1.1 | 0.9, 1.2 | 63 | 1.5 | 1.0, 2.3 | 1.0 | 0.85, 1.13 | 1.6 | 1.0, 2.5 | ||
CI Confidence interval; OR Odds ratio
*
Factors are adjusted for all other variables in the table.