Table 4

Potential risk factors of UI and its subtypes among nulliparous Chinese women

	UI			SUI	UUI	MUI
	aOR* (95% CI)	Beta	P value	aOR† (95% CI)	aOR† (95% CI)	aOR† (95% CI)
Age group, years
20–29	Ref	Ref	Ref	Ref	Ref
30–39	4.16 (2.05, 8.45)	1.43	<0.001	1.47 (0.58, 3.73)	0.57 (0.06, 5.46)	3.47 (0.92, 13.03)
≥40	1.70 (0.83, 3.47)	0.53	0.144	5.31 (2.22, 12.70)	2.79 (0.52, 15.04)	2.03 (0.34, 12.06)
Urbanisation level
Rural	Ref	Ref	Ref	Ref	Ref	Ref
Urban	1.19 (0.76, 1.85)	0.17	0.449	2.27 (1.16, 4.46)	1.11 (0.39, 3.17)	0.54 (0.26, 1.09)
Ethnicity
Han	Ref	Ref	Ref	Ref	Ref	Ref
Minority	2.03 (1.14, 3.64)	0.71	0.017	3.05 (1.52, 6.15)	0.47 (0.06, 3.81)	1.89 (0.66, 5.42)
Marital status
Married	Ref	Ref	Ref	Ref	Ref	Ref
Unmarried	0.31 (0.18, 0.54)	−1.16	<0.001	0.32 (0.16, 0.64)	0.72 (0.19, 2.67)	0.20 (0.07, 0.60)
Education level
Senior school or below	Ref	Ref	Ref	Ref	Ref	Ref
College	0.55 (0.27, 1.13)	−0.61	0.102	0.83 (0.35, 1.97)	0.21 (0.03, 1.84)	0.21 (0.03, 1.75)
Undergrad or above	1.01 (0.53, 1.94)	0.01	0.980	1.17 (0.50, 2.74)	0.36 (0.06, 2.13)	1.37 (0.41, 4.59)
Body mass index
Underweight	1.88 (1.03, 3.45)	0.63	0.041	1.55 (0.68, 3.54)	1.80 (0.35, 9.16)	2.48 (0.91, 6.76)
Normal	Ref	Ref	Ref	Ref	Ref	Ref
Overweight	2.26 (1.37, 3.73)	0.82	0.001	2.54 (1.29, 4.98)	3.14 (0.96, 10.31)	1.75 (0.75, 4.10)
Obese	3.64 (1.86, 7.15)	1.29	<0.001	2.97 (1.12, 7.89)	4.42 (1.01, 19.37)	4.19 (1.49, 11.78)
Occupation level
Mainly mental	0.53 (0.29, 0.98)	−0.64	0.042	0.62 (0.29, 1.33)	0.17 (0.02, 1.58)	0.42 (0.11, 1.54)
Mainly physical	0.55 (0.31, 0.96)	−0.60	0.034	0.63 (0.28, 1.40)	0.83 (0.26, 2.64)	0.28 (0.10, 0.77)
Unemployed	Ref	Ref	Ref	Ref	Ref	Ref
Monthly family income
≤5000	Ref	Ref	Ref	Ref	Ref	Ref
>5000	1.48 (0.92, 2.38)	0.39	0.106	1.69 (0.91, 3.13)	2.72 (0.93, 7.97)	0.80 (0.31, 2.05)
Menopausal status
Premenopausal	Ref	Ref	Ref	Ref	Ref	Ref
Postmenopausal	2.22 (1.22, 4.05)	0.80	0.009	1.26 (0.56, 2.81)	1.82 (0.44, 7.50)	8.79 (1.98, 39.01)
Chronic constipation
No	Ref	Ref	Ref	Ref	Ref	Ref
Yes	5.75 (2.59, 12.74)	1.75	<0.001	7.11 (2.80, 18.01)	3.32 (0.37, 30.13)	4.70 (1.31, 16.83)
Diabetes
No	Ref	Ref	Ref	Ref	Ref	Ref
Yes	1.74 (0.70, 4.34)	0.56	0.232	2.78 (0.83, 9.28)	2.42 (0.41, 14.45)	0.83 (0.20, 3.43)
Other gynaecological disease
No	Ref	Ref	Ref	Ref	Ref	Ref
Yes	1.39 (0.71, 2.73)	0.33	0.335	1.30 (0.52, 3.28)	6.23 (1.86, 20.88)	0.45 (0.12, 1.77)
High blood pressure
No	Ref	Ref	Ref	Ref	Ref	Ref
Yes	1.34 (0.68, 2.64)	0.29	0.397	0.79 (0.27, 2.36)	0.71 (0.15, 3.49)	2.65 (1.08, 6.52)

Bold values denote statistical significance (p < 0.05).
*Binary logistic regression model
†Multinominal logistic regression model
aOR, adjusted odds ratio; MUI, mixed urinary incontinence; SUI, stress urinary incontinence; UI, urinary incontinence; UUI, urgency urinary incontinence.