Table 4. Regression coefficients with confidence intervals showing association between activity and birth measurements.
| Predictor | Mean (cpm) | Total counts/day×103 | V+M/RT (%) |
|---|---|---|---|
| Birth measurementsa,b | |||
| Weight (kg) | 9.62 (−24.73, 43.96) | 0.20 (−27.52, 27.93) | 0.15 (−0.49, 0.79) |
| Length (cm) | −4.48 (−11.41, 2.45) | −2.94 (−8.54, 2.65) | −0.08 (−0.21, 0.05) |
| Abdominal circumference (cm) | 1.68 (−5.39, 8.75) | 1.04 (−4.67, 6.74) | 0.03 (−0.10, 0.16) |
| Chest circumference (cm) | 0.04 (−8.33, 8.41) | 0.26 (−6.50, 7.01) | −0.02 (−0.17, 0.14) |
| Head circumference (cm) | 1.06 (−10.46, 12.58) | 2.14 (−7.16, 11.43) | −0.02 (−0.24, 0.19) |
| Sum of skinfolds (mm)c | 0.10 (−8.07, 8.26) | −2.62 (−9.20, 3.97) | 0.02 (−0.14, 0.17) |
| AMA (cm2) | −2.17 (−14.60, 10.25) | −5.05 (−15.07, 4.97) | −0.07 (−0.30, 0.18) |
RT, registered time; AMA, arm muscle area.
V, time spent vigorously active; M, time spent moderately active; RT, RT during which actigraph was worn; cpm, accelerometer counts per minute.
a
Gender, age at accelerometer wearing, socio-economic status and body fat % at time of accelerometer wearing were included in the model.
b
Gestation-adjusted birthweight.
c
Sum of triceps and subscapular skinfolds. Figures in parentheses are confidence intervals.