Table 2—

Multiple linear regression coefficients (95% CI) for the association between objectively measured components of physical activity with insulin resistance (HOMA-IR) in Portuguese children (n = 308)

Outcome (HOMA-IR)Model 1
Model 2
Model 3
β-Coefficient (95% CI)P valueβ-Coefficient (95% CI)P valueβ-Coefficient (95% CI)P value
Sex (girls)0.370 (0.22–0.52)<0.00010.18 (0.04–0.31)0.010.20 (0.07–0.33)0.001
Sexual maturity (Tanner 1)−0.410 (−0.59 to −0.23)<0.0001−0.17 (−0.33 to −0.004)0.045−0.19 (−0.35 to −0.02)0.025
Birth weight (kg)−0.060 (−0.18–0.06)0.33−0.14 (−0.24 to −0.03)0.013−0.10 (−0.21 to 0.006)0.065
Fat mass (kg)0.05 (0.04–0.06)<0.0001
Central fat mass (kg)0.48 (0.38–0.59)<0.0001
Total physical activity (cpm)−0.001 (−0.008 to −0.003)<0.0001−0.0003 (−0.0006 to −0.00001)0.007−0.0003 (−0.0006 to −0.0009)0.007
Sedentary (min/day)0.001 (0.0002–0.002)0.0030.001 (0.000001–0.002)0.0120.0008 (0.00009–0.002)0.009
Light (min/day)0.0003 (−0.001 to 0.002)0.75−0.0002 (0.002 to 0.001)0.81−0.0002 (−0.002 to 0.001)0.76
MVPA (min/day)−0.002 (−0.003 to −0.001)0.002−0.001 (−0.002 to −0.0003)0.017−0.001 (−0.003 to −0.001)0.022
  • Model 1 adjusted for sex, sexual maturity, and birth weight. Model 2 additionally adjusted for overall fat mass. Model 3 additionally adjusted for central fat mass. Time variables are additionally adjusted for measurement time.