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Table 3 The sex-BMI-stratified coefficients of PA on BF% among middle-aged Chinese adults in 2015

From: The association between physical activity and body fat percentage with adjustment for body mass index among middle-aged adults: China health and nutrition survey in 2015

Variables Normal weight (BMI < 24 kg/m2) Overweight/obese (BMI ≥ 24 kg/m2)
10th 25th 50th 75th 90th 10th 25th 50th 75th 90th
Total BF%
 Male Model 1 −0.075 − 0.150* − 0.105* − 0.085* − 0.111* − 0.079 − 0.084* − 0.103* − 0.068* − 0.034
Model 2 −0.004 − 0.027 − 0.060* − 0.079* − 0.091* − 0.101 − 0.069* − 0.045* − 0.002 − 0.054
Model 3 0.020 0.003 − 0.032 − 0.079* − 0.110* − 0.098 − 0.071* −0.032 0.014 −0.052
 Female Model 1 −0.119* − 0.110* − 0.081* − 0.077* − 0.082* − 0.061 − 0.043 −0.049* − 0.082* − 0.123*
Model 2 0.011 −0.049* − 0.059* − 0.044 − 0.063* − 0.002 − 0.021* − 0.035* −0.032* − 0.031*
Model 3 0.046 −0.046* − 0.073* − 0.057* − 0.098* − 0.006 −0.023 − 0.035* −0.039* − 0.037*
Trunk BF%
 Male Model 1 − 0.133* − 0.181* − 0.130* − 0.127* − 0.152* − 0.135* − 0.157* − 0.124* − 0.078* 0.031
Model 2 −0.054 − 0.044* − 0.086* − 0.098* − 0.137* − 0.128 − 0.078 − 0.061* 0.007 − 0.018
Model 3 0.004 − 0.029 − 0.100* − 0.104* − 0.173* − 0.138 − 0.076 − 0.054 0.020 − 0.020
 Female Model 1 −0.076 −0.131* − 0.115* −0.109* − 0.104* −0.127 − 0.060 −0.065* − 0.114* −0.138*
Model 2 −0.116* −0.097* − 0.067* −0.071* − 0.081* −0.046 − 0.038 −0.056* − 0.047* −0.055*
Model 3 −0.039 −0.124* − 0.108* −0.079* − 0.083 −0.040 − 0.036 −0.059* − 0.050* −0.053*
  1. The coefficients were based on the quantile regression at 10th, 25th, 50th, 75th, and 90th percentiles. *p < 0.05. (P values see Additional file 4.) Model 1 was controlled for the total PA only. The individual-level variables were then added to the equation to estimate Model 2, including the sedentary activity time, age, educational level, marital status, household income level, energy intake, energy percentage from fat, BMI, smoking status, alcohol consumption status and region. For Model 3, urbanization index level was added to Model 2