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Table 4 Mixed models predicting %BF in inactive and active subjects

From: The association between television viewing time and percent body fat in adults varies as a function of physical activity and sex

  Not meeting PA guidelines Meeting PA guidelines
Coefficient Standard error Coefficient Standard error
Fixed effects
Grand intercept 25.01**** 3.33 33.56**** 3.80
TV (h/wk) 1.03*** .37 .15 .44
Age (y) .17**** .05 .06 .05
Race/ethnicity 2.13 1.35 2.46 1.55
Education level −.56 1.46 −3.40 1.86
Environmental score −.58 .45 −.55 .48
Depression symptoms .16 .14 .07 .16
Perceived stress .22 .27 .17 .32
Sex −9.91**** 1.39 −7.96**** 1.53
Random effects     
Level 1 variance 105.05**** 9.20 71.11**** 8.66
Level 2 variance 3.64 2.78 2.01 4.43
Model fit
AIC 2147   1182  
n (individuals) 287   167  
k (block groups) 21   21  
  1. *p < 0.05;**p < 0.01;***p < 0.005;****p < 0.001. AIC – Akaike’s Information Criterion; Level 1 is the residual variance and Level 2 is the variance for intercept across block group