. Author manuscript; available in PMC: 2013 May 13.

Published in final edited form as: Obes Surg. 2011 Oct;21(10):1564–1569. doi: 10.1007/s11695-010-0283-z

Table 4.

Hierarchical regression analyses: 12-month postoperative SF-36 mental health

Variable	ΔR²	Adjusted R²	F	β (standardized) PA frequency as predictor	β (standardized) PA intensity as predictor
Demographic	0.064	0.034	2.15
Sex				−0.091	−0.089
Age				0.214^*	0.191^*
Ethnicity				0.069	0.029
Preoperative BMI				−0.154	−0.175^*
Preoperative SF-36-MC	0.149	0.182	23.71^***	0.393^***	0.402^***
PA Frequency	0.065	0.243	11.10^***	0.266^***
PA Intensity	0.029	0.205	4.70^*		0.175^*

Sex was coded as 0 (female) or 1 (male). Ethnicity was dichotomized and coded as 1 (white) or 2 (non-white)

BMI body mass index, PA physical activity

p<0.05;

^**

p<0.01;

^***

p<0.001