Table 1 Baseline sociodemographic characteristics of the participants
Characteristic | All (N = 80) | Group | |||||||
|---|---|---|---|---|---|---|---|---|---|
Exercise (n = 40) | Control (n = 40) | p | |||||||
Age, mean (SD), y | 14.74 (1.59) | 15.82 (1.11) | 13.65 (1.21) | <.01 | |||||
Sex, No. (%) | |||||||||
 Male | 72 (90.0%) | 35 (87.5%) | 37 (92.5%) | .46 | |||||
 Female | 8 (10.0%) | 5 (12.5%) | 3 (7.5%) | ||||||
Body mass index (BMI), mean (SD) | 20.91 (3.94) | 22.14 (3.98) | 19.67 (3.53) | <.01 | |||||
Socioeconomic status, No. (%) | |||||||||
 HK$10,000 or less | 10 (12.5%) | 7 (17.5%) | 3 (7.5%) | .02 | |||||
 HK$10,001–20,000 | 26 (32.5%) | 7 (17.5%) | 19 (47.5%) | ||||||
 Hk$20,001–30,000 | 18 (22.5%) | 9 (22.5%) | 9 (22.5%) | ||||||
 Hk$30,001–40,000 | 7 (8.8%) | 3 (7.5%) | 4 (10.0%) | ||||||
 HK$40,001–50,000 | 1 (1.3%) | 1 (2.5%) | 0 | ||||||
 HK$50,001–60,000 | 6 (7.5%) | 6 (15.0%) | 0 | ||||||
 HK$60,001–70,000 | 2 (2.5%) | 2 (5.0%) | 0 | ||||||
 More than HK$70,000 | 10 (12.5) | 5 (12.5%) | 5 (12.5%) | ||||||
Maternal education level, No. (%) | .84 | ||||||||
 Primary school | 13 (16.2%) | 5 (12.5%) | 8 (20.0%) | ||||||
 Junior school | 19 (23.8%) | 11 (27.5%) | 8 (20.0%) | ||||||
 High school | 26 (3.25%) | 13 (32.5%) | 13 (32.5%) | ||||||
 College-Preparatory | 3 (3.8%) | 2 (5.0%) | 1 (2.5%) | ||||||
 Non-academic higher education | 8 (10.0%) | 3 (7.5%) | 5 (12.5%) | ||||||
 Undergraduate education | 11 (13.8%) | 6 (15.0%) | 5 (12.5) | ||||||