Table 1. Characteristics of study participants.
| Boy (n = 286) | Girl (n = 236) | P value | |
| Age (years) | 9.2 (9.1, 9.3) | 9.1 (9.0, 9.2) | 0.55 |
| Height (cm) | 139.3 (138.4, 140.2) | 138.4 (137.3, 139.5) | 0.20 |
| Weight (kg) | 38.2 (36.9, 39.5) | 38.1 (36.7, 39.6) | 0.94 |
| BMI (kg/m2) | 19.4 (18.9, 19.9) | 19.6 (19.0, 20.1) | 0.61 |
| Waist Circumference (cm) | 67.6 (66.2, 69.0) | 67.3 (65.8, 68.8) | 0.82 |
| Sedentary Time (min/day) | 363.5 (354.9, 372.1) | 366.7 (358.1, 375.4) | 0.61 |
| Number of valid days of accelerometry (days) | 6.5 (6.4, 6.6) | 6.5 (6.4, 6.6) | 0.98 |
| Number of hours of accelerometry data (hours/day) | 13.8 (13.7, 13.9) | 13.6 (13.5, 13.7) | 0.02 |
| LPA (min/day) | 403.9 (397.1, 410.6) | 409.5 (402.9, 416.1) | 0.24 |
| MVPA (min/day) | 61.2 (57.8, 64.6) | 41.2 (38.8, 43.6) | <0.01 |
| Sedentary Bouts 1–4 Minutes (number/day) | 67 (66, 68) | 70 (69, 72) | <.01 |
| Sedentary Bouts 5–9 Minutes (number/day) | 13 (12, 14) | 13 (13, 14) | 0.58 |
| Sedentary Bouts 10–14 Minutes (number/day) | 4 (4, 5) | 4 (4, 5) | 0.88 |
| Sedentary Bouts 15–29 Minutes (number/day) | 3 (3, 3) | 3 (3, 3) | 0.92 |
| Sedentary Bouts 30+ Minutes (number/day) | 2 (2, 2) | 2 (2, 2) | 0.22 |
| TV viewing (hours/day) | 2.0 (1.8, 2.2) | 1.8 (1.6, 2.0) | 0.12 |
| Computer/video game use (hours/day) | 1.1 (0.9, 1.2) | 0.6 (0.5, 0.7) | <0.01 |
| Systolic BP (mmHg) | 95 (94, 96) | 94 (93, 95) | 0.23 |
| Diastolic BP (mmHg) | 49 (49, 50) | 50 (50, 51) | 0.01 |
| Insulin (pmol/L) | 30.1 (27.9, 32.3) | 38.2 (34.9, 41.5) | <0.01 |
| Glucose (mmol/L) | 5.00 (4.96, 5.04) | 4.90 (4.85, 4.94) | <0.01 |
| HDL-Cholesterol (mmol/L) | 1.22 (1.19, 1.25) | 1.16 (1.13, 1.19) | <0.01 |
| Triglycerides (mmol/L) | 0.76 (0.72, 0.80) | 0.89 (0.84, 0.95) | <0.01 |
| hs-CRP (mg/L) | 1.09 (0.82, 1.36) | 1.20 (0.92, 1.48) | 0.57 |
| Continuous Cardiometabolic Risk Score | 0.03 (−0.41, 0.48) | 0.03 (−0.47, 0.53) | 0.98 |
Data presented as means (95% confidence intervals).
P values represent sex differences assessed using an independent Student’s t-test.
Continuous cardiometabolic risk score was calculated by summing z-scores for insulin, glucose, triglycerides, negative HDL-cholesterol, blood pressure, BMI, and waist circumference for each participant.
BMI, body mass index; LPA, light intensity physical activity; MVPA, moderate-to-vigorous physical activity; TV, television; BP, blood pressure; HDL, high density lipoprotein; hs-CRP, high sensitivity C-reactive protein.