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Table 4 Effect of Intervention on Mean BMI Change over 24 Months

From: HealthWorks: results of a multi-component group-randomized worksite environmental intervention trial for weight gain prevention

 

Mean BMI Change: Intervention

Mean BMI Change: Control

Difference: Intervention - Control

95% Confidence Interval

p

Total Sample

     

Unadjusted

(n = 1,325)

0.30

0.19

0.12

-0.27, 0.51

0.46

Adjusted

(n = 1,322)

0.32

0.19

0.13

-0.21, 0.46

0.36

Women

     

Unadjusted

(n = 823)

0.35

0.35

-0.01

-0.46, 0.44

0.97

Adjusted

(n = 822)

0.35

0.35

0.01

-0.44, 0.46

0.97

Men

     

Unadjusted

(n = 502)

0.34

-0.10

0.45

-0.19, 1.09

0.11

Adjusted

(n = 500)

0.36

-0.13

0.49

-0.19, 1.16

0.11

  1. All models are mixed model ANCOVA models. Unadjusted models include baseline BMI, and adjusted models also include age, education, race, and smoking status; adjusted models for the Total Sample also include sex. Statistical tests for the total sample are based on 4 degrees of freedom, while tests for the models stratified by sex are based on 3 degrees of freedom