Can physical activity reduce excessive gestational weight gain? Findings from a Chinese urban pregnant women cohort study

Table 3 Multiple linear regression of the association of physical activity during pregnancy with gestational weight gain ^† (n = 862)

	Groups	Weight gain (kg)	Slope (95% CI)	P
		Mean ± SD
2^nd trimester	Sedentary	18.05 ± 5.12		-
	Low active	18.04 ± 4.70	-0.02(-0.88,0.83)	0.96
	Somewhat active	17.26 ± 4.45	-0.85(-1.69,0.00)	0.05
	Active	16.66 ± 4.07	-1.41(-2.37, -0.45)	< 0.001
3^rd trimester	Sedentary	18.13 ± 4.75		-
	Low active	17.65 ± 4.70	-0.52(-1.24,0.20)	0.16
	Somewhat active	17.20 ± 4.58	-0.81(-1.62.0.01)	0.05
	Active	16.43 ± 3.79	-1.62(-2.66,-0.57)	< 0.001
Last 2 trimesters	Sedentary	17.69 ± 4.98		-
	Low active	18.04 ± 4.61	0.18(-0.60,0.96)	0.65
	Somewhat active	17.16 ± 4.52	-0.47(-1.29,0.36)	0.27
	Active	16.64 ± 4.18	-1.45(-2.44,-0.46)	< 0.001

^† Multiple linear regression controlling for maternal age, education, job type, family income, pre-pregnancy BMI, gestational age, newborns sex, passive tobacco exposure, daily food energy intake. Sedentary group was the reference.

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