Table 3.
Multiple Regression Analyses for Accelerometrya‐Derived Physical Activity Parameters
| Model 1 | Model 2 | |||
|---|---|---|---|---|
| β | 95% CI | β | 95% CI | |
| DV: total PA, counts×103/dayb | ||||
| Sex (ref: male) | −94.5 | (−175.7, −13.2)c | −91.6 | (−174.6, −8.7)c |
| Age, y | −24.4 | (−39.4, −9.5)d | −25.7 | (−40.9, −10.6)e |
| BMI z scoref | −12.4 | (−42.8, 18.0) | −13.9 | (−47.7, 19.9) |
| Cardiac diagnosis (ref: mild) | ||||
| Moderate | −10.6 | (−124.3, 103.1) | ||
| Severe | −69.6 | (−177.5, 38.2) | ||
| Transplant | −5.7 | (−167.2, 155.7) | ||
| r 2 | 0.154d | 0.176c | ||
| DV: MVPA, min/dayg | ||||
| Sex (ref: male) | −14.7 | (−25.9, −3.5)c | −15.4 | (−26.7, −4.1)d |
| Age, y | −3.2 | (−5.3, −1.1)d | −3.3 | (−5.4, −1.2)d |
| BMI z scoref | −2.6 | (−6.8, 1.6) | −3.8 | (−8.4, 0.8) |
| Cardiac diagnosis (ref: mild) | ||||
| Moderate | −2.3 | (−17.9, 13.2) | ||
| Severe | −11.2 | (−25.9, 3.5) | ||
| Transplant | −16.4 | (−38.5, 5.6) | ||
| r 2 | 0.165d | 0.203d | ||
| DV: vigorous PA, min/dayh | ||||
| Sex (ref: male) | −6.5 | (−13.3, 0.2) | −6.7 | (−13.6, 0.1) |
| Age, y | −0.9 | (−2.1, 0.4) | −1.0 | (−2.2, 0.3) |
| BMI z scoref | −1.8 | (−4.3, 0.8) | −2.5 | (−5.3, 0.3) |
| Cardiac diagnosis (ref: mild) | ||||
| Moderate | −2.4 | (−11.8, 7.0) | ||
| Severe | −7.4 | (−16.3, 1.5) | ||
| Transplant | −8.7 | (−22.1, 4.6) | ||
| r 2 | 0.119 | 0.119 | ||
| DV: sedentary, %/dayi | ||||
| Sex (ref: male) | 5.0 | (1.6, 8.4)d | 5.1 | (1.6, 8.6)d |
| Age, y | 1.9 | (1.3, 2.5)e | 1.9 | (1.3, 2.6)e |
| BMI z scoref | −0.3 | (−1.5, 1.1) | 0.1 | (−1.4, 1.5) |
| Cardiac diagnosis (ref: mild) | ||||
| Moderate | 0.9 | (−3.9, 5.7) | ||
| Severe | 2.6 | (−2.0, 7.1) | ||
| Transplant | 3.8 | (−3.0, 10.7) | ||
| r 2 | 0.331e | 0.347e | ||
Model 1: association between physical activity parameters and various relevant explanatory variables; Model 2: model 1 plus inclusion of cardiac diagnosis. BMI indicates body mass index; DV, dependent variable; MVPA, moderate‐to‐vigorous PA; PA, physical activity; ref, reference.
ActiGraph accelerometry (GT3X+ or GT9X; 15‐second epoch), based on ≥3 days with ≥600 minutes valid wear time.
Total PA: sum of axis 1 (or vertical axis) counts/day.
P<0.05.
P<0.01.
P<0.001.
BMI (kg/m2) z scores calculated based on age–sex‐specific World Health Organization 2007 reference charts.22
MVPA: mean daily minutes of MVPA (≥2296 counts/min).26
Vigorous PA (≥4012 counts/min).26
Sedentary time (%): mean sedentary minutes (<100 counts/min) expressed as a percentage relative to valid monitor wear time.