Table 3.

The association between depressive symptoms and weight status

Variable	Model 1 OR (95% CI)	Model 2 OR (95% CI)	Model 3 OR (95% CI)	Model 4 OR (95% CI)
Whether depressed	1.70 (1.57 to 1.85)***	1.63 (1.35 to 1.97)***	1.48 (1.11 to 1.97)**	1.47 (1.14 to 1.91)**
CES-D scores	1.04 (1.02 to 1.05)***	1.03 (1.01 to 1.05)**	1.02 (0.99 to 1.05)	1.02 (1.00 to 1.05)
Depressed affect	1.07 (1.05 to 1.10)***	1.07 (1.04 to 1.10)***	1.06 (1.01 to 1.10)*	1.06 (1.02 to 1.10)**
Lack of positive affect	1.08 (1.05 to 1.10)***	1.06 (1.04 to 1.07)***	1.04 (1.03 to 1.06)***	1.04 (1.03 to 1.05)***
Somatic symptoms	1.04 (0.99 to 1.10)	1.03 (0.96 to 1.10)	1.02 (0.94 to 1.11)	1.02 (0.95 to 1.10)
Interpersonal difficulties	1.17 (1.04 to 1.32)**	1.14 (0.98 to 1.33)	1.11 (0.92 to 1.33)	1.11 (0.92 to 1.33)

Model 1: no adjustments; model 2: adjusted for age, gender, ethnic minority, duration of breast feeding and birth weight; model 3: additionally adjusted for maternal body mass index, maternal education and household income per capita on the base of model 2; model 4: additionally adjusted for the interaction between regions and urban areas on the base of model 3.

CES-D, Center for Epidemiologic Studies Depression Scales.

*P<0.05; **P<0.01; ***P<0.001.