From: Is body mass index associated with irregular menstruation: a questionnaire study?
BMI categories | Length of cycle (Days, median/range) | Length of menses (Days, median/range) | Menstrual blood loss | |||
---|---|---|---|---|---|---|
Light (number, %) | Medium (number, %) | Heavy (number, %) | Chi-square testa | |||
Underweight (n = 121) | 30 (23–60) | 6 (3–8) | 61 (50%) | 46 (38%) | 14 (12%) | P = 0.001 |
Normal weight (n = 592) | 30 (23–60) | 5.5 (2–8) | 241 (41%) | 206 (35%) | 145 (24%) | |
Overweight (n = 252) | 30 (23–60) | 5.5 (2–10) | 92 (36%) | 87 (34%) | 73 (29%) | |
Obese (n = 47) | 29 (20–35) | 5 (3–7) | 15 (32%) | 12 (26%) | 20 (42%) |