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Table 3 Correlation coefficients between accelerometer-derived physical activity metrics

From: A closer look at the relationship among accelerometer-based physical activity metrics: ICAD pooled data

  SB & LPA MVPA & SB MVPA & LPA MVPA & TAC MPA & VPA
    r (99% CI)   
All −.58 (−.59, −.57) −.43 (−.44, −.42) .32 (.30, .33) .91 (.91, .91) .58 (.58, .59)
Age
 5–9 years −.48 (−.50, −.46) .42 (−.44, −.39) .28 (.25, .30) .92 (.92, .92) .65 (.63, .67)
 10–12 years −.39 (−.40, −.37) −.42 (−.43, −.40) .26 (.24, .28) .92 (.92, .93) .65 (.63, .66)
 13–15 years −.45 (−.47, −.43) −.38 (−.40, −.35) .25 (.23, .28) .92 (.92, .92) .52 (.51, .54)
 16–18 years −.45 (−.49, −.41) −.22 (−.26, −.18) .18 (.14, .23) .91 (.90, .91) .58 (.54, .61)
Sex
 Boy −.57 (−.58, −.55) −.41 (−.43, −.39) .30 (.28, .32) .91 (.91, .92) .51 (.50, .53)
 Girl −.61 (−.62, −.60) −.40 (−.42, −.30) .34 (.32, .35) .89 (.89, .89) .59 (.58, .60)
Mother’s education level
 <=Compulsory education −.52 (−.54, −.50) −.46 (−.48, −.44) .32 (.30, .34) .92 (.92, .93) .66 (.64, .67)
 Some post-compulsory education or vocational −.53 (−.55, −.51) −.43 (−.45, −.40) .35 (.32, 37) .92 (.92, .92) .63 (.61, .64)
 > = Completed undergraduate −.61 (−.63, −.59) −.49 (−.51, −.47) .36 (.33, .39) .93 (.92, .93) .64 (.62, .66)
Obesity status
 Non-obese −.58 (−.59, −.58) −.43 (−.44, −.42) .32 (.30, .33) .91 (.91, .92) .58 (.57, .59)
 Obese −.55 (−.58, −.52) −.42 (−.45, −.38) .30 (.26, .35) .89 (.88, .90) .59 (.55, .62)
Type of day
 Weekday −.56 (−.57, −.55) −.40 (−.41, −.38) .30 (.29, .31) .91 (.91, .91) .56 (.55, .57)
 Weekend −.45 (−.46, −.44) −.39 (−.40, −.38) .32 (.31, .33) .91 (.90, .91) .58 (.57, .59)
Wear time
 8- < 13 h/day −.77 (−.78, −.76) −.52 (−.53, −.50) .32 (.30, .33) .91 (.91, .92) .61 (.60, .62)
 13–18 h/day −.78 (−.79, −.78) −.49 (−.51, −.48) .31 (.29, .33) .91 (.91, .91) .56 (.55, .57)
Wear time (continuous variable)-adjusted −.96 (−.96, −.95) −56 (−.57, −.55) .31 (.30, .31) .91 (91, .91) .58 (.57, .59)
  1. CI, confidence interval; LPA, light-intensity physical activity; MPA, moderate-intensity physical activity; MVPA, moderate-and vigorous-intensity physical activity; SB, sedentary behavior; TAC, total activity counts; VPA, vigorous-intensity physical activity