Table 5.
Variable coefficients (and their standard errors) found by three linear models accounting for different factors associated with percentage weight loss.
| Variable | Model 1 | Model 2 | Model 3 | ||||
|
|
Coefficient (SE) | P value | Coefficient (SE) | P value | Coefficient (SE) | P value | |
| Real world |
|
|
|
|
|
|
|
|
|
BMI | 0.517 (0.090) | <.001 | 0.415 (0.090) | <.001 | 0.371 (0.044) | <.001 |
|
|
Gender | –1.357 (0.140) | <.001 | –1.979 (1.570) | <.001 | –1.471 (0.781) | <.001 |
|
|
Age | 0.235 (1.630) | .88 | 0.126 (0.140) | .36 | 0.118 (0.069) | .09 |
| Online behavior |
|
|
|
|
|
|
|
|
|
Activity |
|
–0.008 (0.005) | .11 | –0.006 (0.001) | .01 | |
|
|
Comments received |
|
0.120 (0.007) | <.001 | 0.005 (0.003) | .12 | |
|
|
Upvotes received |
|
0.002 (0.001) | .04 | 0.002 (0.000) | <.001 | |
|
|
Number of weights |
|
0.270 (0.120) | .02 | 0.288 (0.058) | <.001 | |
|
|
Weeks active |
|
0.008 (0.070) | .90 | 0.089 (0.033) | <.001 | |
|
|
Off days |
|
–0.004 (0.002) | .04 | –0.004 (0.001) | <.001 | |
| Post topics |
|
|
|
|
|
|
|
|
|
Weight control apps |
|
|
–57.26 (26.68) | .03 | ||
|
|
Self-esteem (1)a |
|
|
118.50 (24.49) | <.001 | ||
|
|
Self-esteem (2)a |
|
|
48.03 (27.47) | .08 | ||
|
|
Workout |
|
|
37.22 (20.05) | .06 | ||
|
|
Friendship |
|
|
83.72 (28.31) | .003 | ||
|
|
Health information |
|
|
44.84 (31.49) | .15 | ||
|
|
Weight goals |
|
|
77.90 (26.99) | .004 | ||
|
|
Feelings |
|
|
–125.00 (37.61) | <.001 | ||
|
|
Asking for advice |
|
|
68.97 (44.70) | .12 | ||
|
|
Motivation |
|
|
68.51 (52.50) | .009 | ||
|
|
Weight check-ins |
|
|
42.02 (26.25) | .10 | ||
|
|
Family |
|
|
–47.16 (30.94) | .12 | ||
| Comment topics |
|
|
|
|
|
|
|
|
|
Body transformations |
|
|
112.60 (59.71) | .06 | ||
|
|
Asking for help |
|
|
235.70 (96.420) | .01 | ||
|
|
Body measures |
|
|
–290.90 (108.20) | .007 | ||
|
|
Changing lifestyle |
|
|
–219.20 (141.40) | .12 | ||
|
|
Counting calories |
|
|
187.40 (71.55) | <.001 | ||
|
|
Asking for support |
|
|
–134.20 (63.51) | .03 | ||
|
|
Friendship |
|
|
223.40 (105.20) | .03 | ||
|
|
Workout |
|
|
295.30 (72.43) | <.001 | ||
|
|
Motivation (1)a |
|
|
304.80 (149.60) | .04 | ||
|
|
Weight goals |
|
|
243.00 (66.50) | <.001 | ||
|
|
Motivation (2)a |
|
|
251.80 (100.50) | .01 | ||
|
|
Healthy foods |
|
|
173.70 (91.41) | .05 | ||
|
|
Gratitude |
|
|
160.20 (72.06) | .02 | ||
|
|
Starting again |
|
|
–231.40 (106.10) | .02 | ||
|
|
Lifestyle change |
|
|
221.00 (99.84) | .03 | ||
a Topics generated by latent Dirichlet allocation may overlap. The posts and comments for both self-esteem and motivation appear in two different topics, here indicated by (1) and (2) after their names.