. Author manuscript; available in PMC: 2013 Nov 17.

Published in final edited form as: Obesity (Silver Spring). 2011 Apr 28;20(9):10.1038/oby.2011.88. doi: 10.1038/oby.2011.88

Table 2.

Weight outcomes by race–sex subgroup

	Black men	Black women	White men	White women	P value^a
Mean (95% CI) % change during phase I	−8.1 (−8.8, −7.3)^*	−7.7 (−8.1, −7.2)^*	−10.3 (−10.8, −9.8)^*	−8.7 (−9.1, −8.3)^*	<0.0001
Mean (95% CI) % change from entry to end of study	−4.0 (−5.2, −2.8)^*	−2.3 (−3.1, −1.5)^*	−4.5 (−5.7, −4.0)^*	−3.3 (−4.0, −2.6)^*	0.0002
Mean (95% CI) % change, from randomization to end of study	4.8 (3.6, 6.1)^*	6.3 (5.5, 7.1)^*	5.6 (4.7, 6.4)^*	6.1 (5.4, 6.8)^*	0.22
Percentage of participants at or below entry weight at end of study	71.9	65.7	78.9	68.8	0.003
Percentage of participants at least 5% below entry weight at end of study	34.5	28.8	48.3	36.2	<0.0005

CI, confidence interval.

Three degree-of-freedom P value for comparing race–sex groups based on linear regression (continuous data) or logistic regression (binary data) after adjusting for site, entry weight, and (for % change from randomization).

P ≤ 0.01 that change from entry weight ≠ 0, within subgroup.