Table 2.
Mean (SD) of total quality of life (QOL) component according to the level of demographic characteristics, screen time and physical activity among adolescents. Data are means (SD).
| Variables | Boys (n = 6388) | Girls (n = 6253) | |
|---|---|---|---|
| Place of residence | Rural | 139.11 (19.56) | 138.99 (18.90) |
| Urban | 141.90 (21.04) | 142.48 (20.79) | |
| ES | 0.14 | 0.18 | |
| p-value | 0.00 | 0.00 | |
| SES | Low | 139.46 (19.35) | 139.46 (19.14) |
| Moderate | 140.58 (21.72) | 141.2 (20.72) | |
| High | 146.7 (21.65) | 145.81 (20.57) | |
| ES | 0.03 | 0.02 | |
| p-value | 0.000 | 0.00 | |
| Age when first tried cigarette smoking | No | 143.59 (19.88) | 142.31 (19.36) |
| Age 10 U | 126 (16.22) | 124.44 (15.89) | |
| Age 11–14 | 129.37 (17.37) | 126.38 (15.67) | |
| Age 15 A | 134.14 (17.38) | 130.45 (17.89) | |
| ES | −0.10 | −0.07 | |
| p-value | 0.000 | 0.000 | |
| Smoking status in the past 30 days | NS | 142.02 (19.93) | 141.52 (19.53) |
| OS | 125.81 (17.02) | 124.13 (15.3) | |
| RS | 126.41 (15.92) | 124.32 (13.96) | |
| ES | −0.06 | −0.05 | |
| p-value | 0.000 | 0.000 | |
| Physical activity | Inactive | 135.93 (19.60) | 136.37 (18.43) |
| Active | 142.71 (20.17) | 143.41 (20.15) | |
| ES | 0.34 | 0.36 | |
| p-value | 0.00 | 0.00 | |
| Physical activity ≥ 30 min per week | 0 days | 134.77 (20.35) | 134.49 (18.93) |
| 1–2 days | 137.67 (18.39) | 138.51 (17.70) | |
| 3–4 days | 141.89 (19.22) | 143.26 (19.41) | |
| ≥5 days | 147.24 (20.34) | 147.25 (20.61) | |
| ES | 0.06 | 0.06 | |
| p-value | 0.000 | 0.000 | |
| Screen time category | <2 h | 142.16 (20.04) | 141.60 (19.51) |
| ≥2 h | 130.67 (18.35) | 129.10 (18.15) | |
| ES | −0.58 | −0.65 | |
| p-value | 0.00 | 0.00 |
SD, standard deviation; QOL, quality of life; SES, socioeconomic status; age 10 U, age 10 and under; age 15 A, age 15 and above; NS, never smoker, OS, occasional smoker; RS, regular smoker; ES, effect size.