Table 2. Energy Expenditure in Obese Pregnancy.

Variable	Overall N=72	Class I N=30	Class II N=24	Class III N=18	P For Obesity Class
TDEE, kcal/d	2639 ± 46	2540 ± 57	2623 ± 86	2847 ± 99	0.03
SleepEE, kcal/d	1768 ± 33	1621 ± 29	1724 ± 47	2053 ± 62	<0.001
REE, kcal/d	1825 ± 34	1686 ± 39	1775 ± 50	2102 ± 58	<0.001
AREE, kcal/d	569 ± 30	596 ± 47	585 ± 56	499 ± 50	0.43
PAL	1.47 ± 0.02	1.51 ± 0.04	1.48 ± 0.04	1.38 ± 0.02	0.04

Energy expenditure was measured between 13-16 weeks of gestation. Abbreviations: TDEE, total daily EE; EE, energy expenditure; SleepEE, sleeping EE; REE, resting EE; PAL, physical activity level; AREE, activity-related EE. Data is expressed as means ± SEM. Differences in energy by obesity class were tested with linear models.