# Table 5 Structural Equation Model with Calorie Intake and Physical Activity as mediators between Depression and Body Fat and with baseline covariates

Explanatory variable Coefficient ± Standard Error P
Body Fat at follow-up Equation, kg
Leisure time physical activity at follow-up, METs/wk −0.004 ± 0.011 0.700
Calorie Intake at follow-up 100 kcal 0.039 ± 0.023 0.099
Body fat at baseline, kg 0.931 ± 0.030 < 0.001
Age at follow-up −0.102 ± 0.017 < 0.001
Constant 28.459 ± 0.196 < 0.001
Leisure time physical activity at follow-up equation, METs/wk
Depression score at follow-up, CESD −0.152 ± 0.074 0.041
Leisure time physical activity at baseline, METs/wk 0.262 ± 0.058 0.000
Body fat at baseline, kg 0.020 ± 0.098 0.839
Age at follow-up 0.030 ± 0.058 0.608
Constant −0.261 ± 0.824 0.752
Calorie Intake at follow-up, 100 kcal
Depression score at follow-up, CESD 0.151 ± 0.044 0.001
Calorie Intake at baseline, 100 kcal 0.316 ± 0.065 0.000
Body fat at baseline, kg −0.027 ± 0.056 0.636
Age at follow-up −0.042 ± 0.030 0.162
Constant 0.130 ± 0.374 0.729
Depression score at follow-up, CES-D*
Leisure time physical activity at baseline, METs/wk −0.020 ± 0.020 0.324
Calorie Intake at baseline, 100 kcal 0.078 ± 0.042 0.062
Depression score at baseline, CESD 0.455 ± 0.046 0.000
Body fat at baseline, kg 0.076 ± 0.050 0.126
Age at follow-up −0.059 ± 0.033 0.072
Constant 0.030 ± 0.398 0.940
Error Covariances
Calorie intake with physical activity −2.371 ± 5.362 0.658
1. n = 456
2. Fit statistics: χ 8=7.97, p = 0.437; RMSE < 0.001, P(RMSEA < 0.05) =0.921; CFI = 1.0; TLI = 1.0
3. Model estimated with the asymptotic distribution free method. All covariance parameters between exogenous variables were also included (available as Additional file 1: Table S2). All variables were centered at the mean except body fat at follow-up
4. *Excludes an item that asked about whether the subject experienced lack of hunger