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Table 2 Analysis of menstrual blood loss according to BMI categories

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%)

  1. aChi-square test was performed for analysis of the amount of menstrual blood loss and BMI