TABLE 4.

Bivariate and multivariate logistic regression analyses of factors associated with hypertension.

Factor	Bivariate		Multivariate
	OR (95% CI)	P	OR (95% CI)	P
Demographic factors
Age	1.78 (1.43, 2.22)	< 0.001	2.03 (1.34, 3.06)	0.001
Male gender	0.38 (0.18, 0.8)	0.011	0.63 (0.19, 2.02)	0.435
Ethnicity (Ibo vs Hausa/other)	17.00 (2.19, 131.97)	0.007	19.17 (0.87, 424.17)	0.062
Educational status
Primary school or less	1	-	1	-
Secondary school or higher	0.31 (0.15, 0.63)	0.001	0.94 (0.28, 3.24)	0.928
Marital status
Married vs single†	20.08 (4.56, 88.48)	< 0.001	-	-
Genetic risk factors
Hypertension in parents	0.84 (0.39, 1.8)	0.652	-	-
Family history of hypertension	1.04 (0.9, 1.21)	0.596	-	-
BMI category
Normal	1	-	1	-
Underweight	2.10 (0.48, 9.27)	0.327	0.67 (0.07, 6.13)	0.724
Overweight	2.00 (0.89, 4.50)	0.094	4.25 (1.22, 14.83)	0.023
Obese	3.93 (1.43, 10.81)	0.008	8.17 (1.99, 33.5)	0.004
Lifestyle risk factors
Abdominal circumference‡	1.06 (1.03, 1.09)	< 0.001	-	-
High salt intake	1.59 (0.79, 3.20)	0.193	3.43 (1.03, 11.47)	0.045
High alcohol intake	1.10 (0.55, 2.21)	0.782	-	-
Diet high in cholesterol or fat	1.78 (0.88, 3.63)	0.111	1.60 (0.54, 4.75)	0.396
Little physical activity	1.14 (0.55, 2.39)	0.72	-	-
Smoking	0.74 (0.37, 1.50)	0.406	-	-
Stress	1.24 (0.59, 2.59)	0.576	-	-
Noise	1.23 (0.61, 2.48)	0.554	-	-
Village
Idinisagba	1	-	1	-
Umuodafe	0.92 (0.42, 2.01)	0.833	2.36 (0.74, 7.55)	0.146
Ogboli	7.41 (2.15, 25.61)	0.002	110.5 (8.74, 1397.41)	< 0.001

BMI, body mass index; CI, confidence interval; OR, odds ratio.

^†Removed from the final multivariate model owing to a high variance inflation factor (> 20).

^‡Removed from the final multivariate model owing to a high correlation (co-linearity) with BMI (Pearson correlation coefficient = 0.724; P < 0.05).