TABLE 4.

Adjusted Anthropometric, Diet, and Physical Activity Variables at Baseline and Postintervention of Participants in an Obesity Intervention for Elementary School Personnel, by Intervention Condition: Los Angeles, CA, 2005–2007

Variable and Time	Control	Intervention	P
BMI, kg/m2			.048
Baseline, mean (SE)	27.60 (0.048)	28.46 (0.049)
Postintervention, mean (SE)	27.97 (0.039)	28.42 (0.039)
Change	+0.37	−0.04
Waist–hip ratio			.676
Baseline, mean (SE)	0.87 (0.001)	0.86 (0.001)
Postintervention, mean (SE)	0.87 (0.001)	0.87 (0.001)
Change	0.00	+0.01
Metabolic equivalent minutes of physical activity per wk, square root			.326
Baseline, mean (SE)	33.46 (0.093)	36.90 (0.094)
Postintervention, mean (SE)	35.88 (0.086)	36.36 (0.092)
Change	+2.42	−0.54
Fruit and vegetable daily servings, square root			.685
Baseline, mean (SE)	2.11 (0.003)	2.07 (0.003)
Postintervention, mean (SE)	2.13 (0.002)	2.15 (0.002)
Change	+0.02	+0.08

Note. BMI = body mass index (weight in kilograms divided by height in meters squared). Data were adjusted for age, ethnicity, and job classification. Gender was included in initial regression models but was removed because it was unrelated to change from pretest to posttest in the measured outcomes. Cases with missing data were removed by casewise deletion. Sample sizes were as follows: for body mass index, n = 337 for control and n = 339 for intervention; for waist–hip ratio, n = 339 for control and n = 342 for intervention; for physical activity, n = 324 for control and n = 326 for intervention; for fruit and vegetable servings, n = 340 for control and n = 332 for intervention. Percentages are adjusted for the clustering of staff within school worksites. P value is for the test of the interaction of intervention × time.