Table 3.
Prevalence rates and proportions or mean values of each psychosocial and lifestyle variables for the four clusters among boys
| All | Externalizing behavior | Sedentary | Obese | Reference | |
|---|---|---|---|---|---|
| Prevalence |
100% |
14.3% |
26.8% |
7.8% |
51.0% |
| Internalizing problemsa |
0.11 |
0.31 |
0.15 |
0.12 |
0.04 |
| Externalizing problemsa |
0.16 |
1.00 |
0.00 |
0.20 |
0.00 |
| Physical activitya, h/week |
|
|
|
|
|
| <2 |
0.31 |
0.34 |
0.50 |
0.43 |
0.18 |
| 2–3 |
0.30 |
0.19 |
0.30 |
0.29 |
0.21 |
| >3 |
0.39 |
0.48 |
0.20 |
0.28 |
0.60 |
| Sitting timea, h/day |
|
|
|
|
|
| < 4.1 h |
0.22 |
0.17 |
0.07 |
0.14 |
0.33 |
| 4.1–7.9 h |
0.43 |
0.43 |
0.25 |
0.37 |
0.54 |
| > 7.9 h |
0.35 |
0.41 |
0.68 |
0.48 |
0.13 |
| Sleeping timea, h/day |
|
|
|
|
|
| <8 h |
0.17 |
0.27 |
0.39 |
0.25 |
0.01 |
| 8–9 h |
0.67 |
0.54 |
0.47 |
0.60 |
0.82 |
| >9 h |
0.17 |
0.19 |
0.15 |
0.15 |
0.17 |
| BMIa,b, kg/m2 |
|
|
|
|
|
| mean value (CI) |
21.1 (21.0–21.2) |
20.6 (20.4–20.9) |
20.1 (20.0–20.3) |
29.7 (29.3–30.2) |
20.5 (20.4–20.6) |
| Smokinga |
|
|
|
|
|
| non-smoker |
0.84 |
0.54 |
0.79 |
0.86 |
0.94 |
| 0.1–1.0 pack-years |
0.08 |
0.23 |
0.09 |
0.07 |
0.04 |
| >1.0 pack-years | 0.08 | 0.23 | 0.12 | 0.07 | 0.02 |
ap < 0.001.
bContinuous variables used.
CI = confidence interval.
BMI = body mass index.