Table 1.

Multivariate predictors of becoming inactive among women who were active pre-pregnancy (n=903)^a

	Pre to anytime during pregnancyb		Pre to Early		Pre to Mid		Pre to Late
	ORc	95% CI	ORc	95% CI	ORc	95% CI	ORc	95% CI
Age (years)
16–19	0.32	0.09, 1.08	1.21	0.73, 2.00	0.62	0.31, 1.22	0.72	0.36, 1.42
20–24	1.00	Ref	1.00	Ref	1.00	Ref	1.00	Ref
25–30	1.06	0.30, 3.38	1.31	0.74, 2.32	1.97	0.90, 4.30	0.60	0.29, 1.22
>30	2.74	0.49, 15.24	1.41	0.72, 2.79	2.27	0.85, 6.00	0.43	0.18, 1.04
p-trend	0.07		0.57		<0.01		0.16
BMI
<18.5	0.36	0.06, 2.08	1.38	0.60, 3.14	0.86	0.25, 2.88	2.02	0.65, 6.26
18.5–24.9	1.00	Ref	1.00	Ref	1.00	Ref	1.00	Ref
25–29.9	0.74	0.23, 2.34	0.98	0.60, 1.59	0.51	0.26, 0.96	0.99	0.50, 1.95
>30	0.29	0.10, 0.82	0.63	0.38, 1.00	0.38	0.20, 0.73	0.93	0.50, 1.71
p-trend	0.11		0.03		<0.01		0.66
Educational Status
<High school	1.00	Ref	1.00	Ref	1.00	Ref	1.00	Ref
High school	0.57	0.22, 1.46	0.94	0.60, 1.47	0.71	0.40, 1.27	0.83	0.46, 1.46
Some college/graduate	1.70	0.38, 7.60	1.48	0.85, 2.54	0.73	0.35, 1.56	2.05	0.95, 4.43
p-trend	0.78		0.55		0.29		0.10
Annual Household Income
≤$15,000	1.00	Ref	1.00	Ref	1.00	Ref	1.00	Ref
>$15,000–$30,000	0.56	0.14, 2.27	0.47	0.25, 0.89	0.70	0.31, 1.60	0.65	0.30, 1.42
>$30,000	0.54	0.09, 3.38	0.84	0.39, 1.78	2.36	0.73, 7.63	1.36	0.43, 4.32
Don’t know/refused/missing	0.66	0.23, 1.89	0.89	0.57, 1.40	1.39	0.77, 2.50	0.69	0.37, 1.27
p-trend	0.53		0.45		0.08		0.34
Parity
0	1.00	Ref	1.00	Ref	1.00	Ref	1.00	Ref
1	0.49	0.15, 1.61	0.48	0.29, 0.79	0.30	0.16, 0.58	0.89	0.46, 1.72
≥2	0.15	0.04, 0.56	0.46	0.26, 0.82	0.31	0.14, 0.67	0.61	0.29, 1.27
p-trend	<0.01		<0.01		<0.01		0.26
Early- Pregnancy Major Depression
No	1.00	Ref	1.00	Ref	1.00	Ref	1.00	Ref
Yes	1.29	0.39, 4.24	1.07	0.64, 1.77	0.58	0.29, 1.16	0.67	0.36, 1.34
Total Pre-Pregnancy
MET-hours/eewk (M of each quartile)
1st quartile-27.7	1.00	Ref	1.00	Ref	1.00	Ref	1.00	Ref
2nd quartile-39.1	0.63	0.06, 6.43	0.53	0.12, 1.22	0.25	0.05, 1.29	0.46	0.14, 1.51
3rd quartile-54.9	0.47	0.05, 4.35	0.23	0.10, 0.51	0.18	0.04, 0.91	0.44	0.14, 1.39
4th quartile-101.6	0.14	0.01, 1.28	0.13	0.05, 0.29	0.08	0.02, 0.43	0.23	0.07, 0.72
p-trend	<0.01		<0.01		<0.01		<0.01

^aOf the 1355 participants, 411 were excluded who were inactive prior to pregnancy and 41 who were missing covariate information

^bEarly, mid-, or late pregnancy

^cEach variable adjusted for all the other variables in the model