. Author manuscript; available in PMC: 2016 Sep 12.

Published in final edited form as: Matern Child Health J. 2016 Jun;20(6):1247–1257. doi: 10.1007/s10995-016-1926-z

Table 2.

Odds Ratios for the association of moderate-intensity sports and exercise with rate of gestational weight gain^a below and above the Institute of Medicine’s prepregnancy BMI-specific recommended ranges.

		Gestational weight gain below recommended rates (n= 505)	Gestational weight gain above recommended rates (n= 219)
	N	OR^b (95% CI)	OR^b (95% CI)
Full cohort (n= 888)
First tertile^c	277	1.00	1.00
Second tertile^c	308	1.05 (0.67, 1.64)	1.06 (0.64, 1.77)
Third tertile^c	303	1.18 (0.73, 1.90)	0.84 (0.48, 1.46)
P for trend		0.82	0.33
Prepregnancy BMI < 25 kg/m² (n= 319)^d
First tertile^e	90	1.00	1.00
Second tertile^e	113	1.22 (0.59, 2.54)	0.76 (0.28, 2.07)
Third tertile^e	116	1.40 (0.65, 3.02)	0.72 (0.25, 2.02)
P for trend		0.39	0.54
Prepregnancy BMI ≥ 25 kg/m² (n= 567)
First tertile^f	186	1.00	1.00
Second tertile^f	195	0.86 (0.48, 1.55)	1.04 (0.56, 1.93)
Third tertile^f	186	0.99 (0.53, 1.85)	0.79 (0.40, 1.57)
P for trend		0.97	0.51

Average weekly rate of gestational weight gain from gestational diabetes diagnosis to end of pregnancy.

Multinomial logistic regression model adjusted for age, prepregnancy BMI, race-ethnicity, education, income, parity, energy intake, number of weeks between weight measurements at gestational diabetes diagnosis and before delivery, and total volume of physical activity; rate of gestational weight gain ‘within’ the range recommended by the IOM as the reference.

Median moderate-intensity sports and exercise (MET hours per week) in the full cohort, by tertile: 2.4 (first tertile), 9.3 (second tertile), and 23.3 (third tertile).

African American women excluded from analyses of prepregnancy BMI < 25 kg/m² due to small cell sizes (n= 2).

Using cut points from the full cohort, median moderate-intensity sports and exercise (MET hours per week) in women with prepregnancy BMI < 25 kg/m², by tertile: 3.3 (first tertile), 9.3 (second tertile), and 22.3 (third tertile).

Using cut points from the full cohort, median moderate-intensity sports and exercise (MET hours per week) in women with prepregnancy BMI ≥ 25 kg/m², by tertile: 2.4 (first tertile), 9.3 (second tertile), and 23.4 (third tertile).

BMI= Body Mass Index.