| Menstrual bleeding duration* N = 18,818 | Menstrual cycle duration* N = 18,581 | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
< 2 days | 2–7 days | > 7 days | < 21 days | 21–35 days | > 35 days | |||||
aOR (95%CI) | p value | Ref | aOR (95%CI) | p value | aOR (95%CI) | p value | Ref | aOR (95%CI) | p value | |
Age | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 18–25 | 1.00 |  |  | 1.00 |  | 1.00 |  |  | 1.00 |  |
 26–35 | 2.25 (1.45–3.51) | < 0.001 |  | 0.82 (0.69–0.98) | 0.026 | 0.98 (0.83–1.16) | 0.801 |  | 0.69 (0.60–0.79) | < 0.001 |
 36–45 | 3.12 (1.99–4.91) | < 0.001 |  | 0.77 (0.64–0.94) | 0.009 | 1.23 (1.03–1.46) | 0.022 |  | 0.27 (0.23–0.32) | < 0.001 |
 46–55 | 4.80 (2.91–7.93) | < 0.001 |  | 1.15 (0.91–1.46) | 0.231 | 1.47 (1.18–1.83) | 0.001 |  | 0.64 (0.52–0.79) | < 0.001 |
Completed education | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 University education | 1.00 |  |  | 1.00 |  | 1.00 |  |  | 1.00 |  |
 Secondary education | 1.49 (1.14–1.95) | 0.003 |  | 1.15 (1.00–1.32) | 0.052 | 1.70 (1.51–1.93) | < 0.001 |  | 0.98 (0.86–1.10) | 0.714 |
 Primary education | 2.87 (1.42–5.79) | 0.003 |  | 2.05 (1.35–3.11) | 0.001 | 2.97 (2.06–4.28) | < 0.001 |  | 1.00 (0.57–1.75) | 0.993 |
Caregiver | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 No | 1.00 |  |  | 1.00 |  | 1.00 |  |  | 1.00 |  |
 Yes | 1.02 (0.78–1.33) | 0.893 |  | 1.24 (1.07–1.43) | 0.004 | 1.09 (0.96–1.25) | 0.179 |  | 0.92 (0.80–1.05) | 0.221 |
Financial problems < 12 months |  |  |  |  |  |  |  |  |  |  |
 Never | 1.00 |  |  | 1.00 |  | 1.00 |  |  | 1.00 |  |
 Some/A few times | 1.06 (0.81–1.38) | 0.681 |  | 1.25 (1.09–1.43) | 0.001 | 1.31 (1.16–1.48) | < 0.001 |  | 1.01 (0.90–1.14) | 0.821 |
 Always/Many times | 1.19 (0.83–1.70) | 0.352 |  | 1.45 (1.22–1.74) | < 0.001 | 1.43 (1.21–1.68) | < 0.001 |  | 1.07 (0.91–1.26) | 0.428 |
Self-rated health | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Excellent | 1.00 |  |  | 1.00 |  | 1.00 |  |  | 1.00 |  |
 Very good | 0.70 (0.45–1.08) | 0.103 |  | 1.56 (1.13–2.17) | 0.008 | 0.91 (0.72–1.15) | 0.445 |  | 0.85 (0.68–1.05) | 0.128 |
 Good | 0.67 (0.44–1.03) | 0.067 |  | 1.97 (1.42–2.72) | < 0.001 | 1.02 (0.81–1.28) | 0.876 |  | 1.08 (0.88–1.34) | 0.469 |
 Fair | 0.89 (0.52–1.52) | 0.675 |  | 3.08 (2.16–4.39) | < 0.001 | 1.29 (0.98–1.70) | 0.069 |  | 1.59 (1.24–2.05) | < 0.001 |
 Poor | 2.89 (1.30–6.39) | 0.009 |  | 6.23 (3.70–10.47) | < 0.001 | 2.15 (1.30–3.55) | 0.003 |  | 1.89 (1.10–3.23) | 0.021 |