Menstrual disorder is associated with blood type in PCOS patients: evidence from a cross-sectional survey

BMC Endocrine Disorders

Table 4 Distribution by ABO blood types for present level of menstruation

Present level of menstruation	N	Blood Type				P-value*
Present level of menstruation	N	A(%)	AB(%)	B(%)	O(%)	P-value*
PCOS						0.036
Light	88	21.6	19.3	36.4	22.7	P₁₁ = 0.308	P₁₂ = 0.034
Normal	178	21.3	9	36.5	33.1	P₂₁ = 0.007	P₂₂ = 0.110
Heavy	20	10	15	20	55	P₃₁ = 0.267	P₃₂ = 0.017

* P_1* = A vs. O, P_2* = AB vs. O, P_3* = B vs. O, P_*1 = Light vs. Normal, P_*2 = Light vs. Heavy
Univariate analysis included the one-way ANOVA, the Kruskal-Wallis test and χ2 test

ISSN: 1472-6823