Table 4.
Correlates of heavy menstrual bleeding compared with normal menstrual bleeding among nulliparous Danish women in the Snart-Gravid study (n = 1,881*)
| Heavy menstruation (.20 pads), n (%) | Prevalence ratio† | 95% CI | |
|---|---|---|---|
| Age (years) | |||
| <25 | 67 (15.8) | 1.00 | (reference) |
| 25–29 | 116 (12.7) | 0.80 | 0.60–1.06 |
| 30–34 | 47 (13.4) | 0.82 | 0.58–1.17 |
| 35–40 | 7 (13.5) | 0.71 | 0.34–1.48 |
| BMI (kg/m2) | |||
| <20 | 34 (12.4) | 1.05 | 0.74–1.51 |
| 20–24 | 116 (11.7) | 1.00 | (reference) |
| 25–29 | 44 (14.8) | 1.25 | 0.90–1.72 |
| ≥30 | 43 (23.6) | 2.03 | 1.47–2.80 |
| Physical activity (METs) | |||
| <5 | 12 (17.1) | 1.02 | 0.59–1.78 |
| 5–9 | 17 (12.5) | 0.81 | 0.50–1.33 |
| 10–19 | 75 (14.7) | 1.10 | 0.82–1.46 |
| 20–39 | 84 (12.5) | 1.00 | (reference) |
| ≥40 | 49 (13.9) | 1.13 | 0.82–1.57 |
| Alcohol (drinks/week) | |||
| Does not drink | 81 (14.6) | 1.00 | (reference) |
| 1–2 | 59 (11.9) | 0.81 | 0.59–1.11 |
| 3–6 | 64 (12.8) | 0.83 | 0.61–1.14 |
| 7–13 | 24 (15.8) | 0.94 | 0.61–1.44 |
| ≥14 | 9 (23.7) | 1.48 | 0.80–2.72 |
| Smoking (cigarettes/day) | |||
| Does not smoke | 186 (12.7) | 1.00 | (reference) |
| <1 | 12 (14.1) | 1.04 | 0.60–1.80 |
| 1–9 | 12 (14.2) | 1.03 | 0.60–1.76 |
| ≥10 | 27 (23.5) | 1.60 | 1.11–2.30 |
| Caffeine (mg/day) | |||
| <100 | 121 (11.8) | 1.00 | (reference) |
| 100–199 | 54 (14.7) | 1.33 | 0.98–1.79 |
| 200–299 | 36 (18.6) | 1.63 | 1.16–2.31 |
| ≥300 | 26 (16.7) | 1.45 | 0.96–2.19 |
Notes:
*
We excluded women with missing information on heaviness of menstruation (n = 2) and with missing covariate information (n = 47);
†
Mutually adjusted for all other covariates and most recent method of birth control.
Abbreviations: n, number; CI, confidence interval; BMI, body mass index; METs, metabolic equivalents.