Table 2.
Distribution of characteristics by level of SB among 294 participants, at ages 8–10 years (Visit 1) and 10–12 years (Visit 2).
| Visit 1 Excess SB (n = 72) |
Visit 1 No excess SB (n = 222) |
Visit 2 Excess SB (n = 168) |
Visit 2 No excess SB (n = 126) |
|
|---|---|---|---|---|
| Individual
characteristics Mean/Proportion (95% confidence interval) | ||||
| Age, years, mean | 9.9 (9.8 – 10.1) | 9.4 (9.3–9.5) | 11.9 (11.8–12.0) | 11.2 (11.1–11.4) |
| Sex, boys, % | 55.6 (43.9–67.2) | 57.2 (50.7–63.8) | 50.0 (42.4–57.6) | 65.9 (57.5–74.2) |
| Puberty initiated, % | 31.9 (21.0–42.8) | 15.8 (10.9–20.6) | 75.9 (69.3–82.5) | 46.4 (37.6–55.2) |
| Met physical activity guidelines, % | 5.6 (0.2–10.9) | 40.1 (33.6–46.6) | 7.7 (3.7–11.8) | 38.9 (30.3–47.5) |
| Body mass index percentile, mean | 73.9 (67.4–80.5) | 64.4 (60.7–68.2) | 71.6 (67.3–75.8) | 60.9 (55.9–65.9) |
| >2 h/day of screen time on weekdays, % | 44.4 (32.8–56.0) | 38.5 (32.0–44.9) | 56.0 (48.4–63.5) | 46.8 (38.0–55.6) |
| >2 h/day of screen time on weekends, % | 72.2 (61.7–82.7) | 61.5 (55.0–68.0) | 82.7 (76.9–88.5) | 82.4 (75.7–89.1) |
| Average minutes of SB, mean | 327.0 (321.7–332.2) | 248.5 (243.9–253.0) | 345.2 (339.3–351.0) | 263.9 (259.0–268.9) |
| Family characteristics | ||||
| Household income <25000$, % | 15.5 (7.0–24.0) | 14.4 (9.8–19.1) | 12.5 (7.5–17.5) | 17.6 (10.9–24.3) |
| ≥ 1 parent with a university degree, % | 62.5 (51.1–73.8) | 55.4 (48.8–62.0) | 57.1 (49.6–64.7) | 57.1 (48.4–65.8) |
| Maternal BMI, mean | 29.1 (27.6–30.6) | 29.1 (28.2–29.9) | 29.8 (28.5–31.1) | 29.5 (28.4–30.5) |
| Paternal BMI, mean | 31.6 (30.2–32.9) | 30.2 (29.5–31.0) | 31.2 (30.1–32.3) | 30.9 (29.4–32.4) |
| Neighbourhood characteristics | ||||
| Street connectivity, mean | 77.1 (68.1–86.1) | 75.5 (70.4–80.6) | 73.8 (67.9–79.7) | 78.7 (72.0–85.5) |
| Land use mix, mean | 0.34 (0.31–0.38) | 0.35 (0.32–0.37) | 0.34 (0.32–0.36) | 0.35 (0.32–0.38) |
| High area disadvantage, % | 31.9 (21.1–42.8) | 33.8 (27.5–40.0) | 30.4 (23.3–37.4) | 37.3 (28.8–45.8) |
| Presence of physical disorder, % | 33.3 (22.3–44.3) | 31.2 (24.9–37.4) | 33.5 (26.3–40.8) | 29.3 (21.2–37.4) |
| ≥ 4 parks, % | 20.8 (11.3–30.3) | 19.8 (14.5–25.1) | 17.9 (12.0–23.7) | 23.0 (15.6–30.4) |
| High dwelling density, % | 27.8 (17.3–38.2) | 31.5 (25.3–37.7) | 31.6 (24.5–38.6) | 29.4 (21.3–37.3) |