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

BMC Endocrine Disorders

Table 3 Ordered regression analysis for factors associated with the present level of menstruation

Factors	B	Std. Error	p value	OR(95% CI)
Blood Type O	Ref.
Blood Type A	-0.7	0.36	0.049	0.49(0.24 ~ 0.99)
Blood Type B	-0.58	0.31	0.059	0.56(0.3 ~ 1.02)
Blood Type AB	-1.07	0.42	0.010	0.34(0.15 ~ 0.78)
BMI	0.01	0.02	0.624	1.01(0.96 ~ 1.06)
present regularity of menstruation	0.9	0.31	0.004	2.46(1.35 ~ 4.59)
Intercepts of light\| normal	-0.86	0.69	0.211	/
Intercepts of normal\| heavy	2.73	0.72	0.000	/

Blood Type O is used as the reference group; when the independent variable is a continuous variable, the continuous variable is directly included in the binary logistic regression model

ISSN: 1472-6823