Skip to main content

Table 3 Website engagement and percentage weight loss: multiple regression analysis

From: The association between weight loss and engagement with a web-based food and exercise diary in a commercial weight loss programme: a retrospective analysis

Independent associations with percentage weight loss1

 

Beta

p

Variance explained by engagement

R2 change (p)

Variance explained by model

Adjusted R2

Women

    

Food diary engagement

.40

< .001

13% (< .001)

19%

Exercise diary engagement

.33

< .001

9% (< .001)

15%

Forum use (dichotomised)

.14

< .001

2% (< .001)

8%

Men

    

Food diary engagement

.49

< .001

18% (< .001)

21%

Exercise diary engagement

.45

< .001

17% (< .001)

20%

Forum use (dichotomised)

.04

.30 ns

0.2% (.29 ns)

3%

Mutually adjusted associations with percentage weight loss 2

 

Beta

p

Variance explained by engagement

R2 change (p)

Variance explained by model

Adjusted R2

Women

    

Food diary engagement

.36

< .001

13% (< .001)

19%

Exercise diary engagement

.03

.48 ns

  

Forum use (dichotomised)

.07

< .01

  

Men

    

Food diary engagement

.30

< .001

19% (< .001)

22%

Exercise diary engagement

.21

< .01

  

Forum use (dichotomised)

-.01

.75 ns

  
  1. Women N = 2979 Men N = 642
  2. 1Covariates: initial BMI, and number of days between first and last recorded weight. Separate analyses for each engagement variable
  3. 2Covariates as above and all engagement variables included in the model