Variable | Kinds | Intervention group (n = 2065) | Control group (n = 2019) | x2 | P | ||
---|---|---|---|---|---|---|---|
Counts | Frequency (%) | Counts | Frequency (%) | ||||
Gender | Male | 1131 | 54.77 | 1087 | 53.84 | 0.36 | 0.55 |
Female | 934 | 45.23 | 932 | 46.16 | |||
Age | 10–13 years old | 955 | 46.25 | 857 | 42.45 | 7.07 | 0.03* |
14–17 years old | 926 | 44.84 | 988 | 48.94 | |||
18–20 years old | 184 | 8.91 | 174 | 8.62 | |||
Nationality | Han | 2024 | 98.02 | 1998 | 98.96 | 6.10 | 0.02* |
Minority | 41 | 1.99 | 21 | 1.04 | |||
Educational level | Primary school | 838 | 40.58 | 795 | 39.38 | 1.96 | 0.38 |
Junior high school | 596 | 28.86 | 606 | 30.02 | |||
Senior high school | 631 | 30.56 | 618 | 30.61 | |||
Household register | Urban | 1563 | 75.69 | 1168 | 57.85 | 146.65 | < 0.01** |
Rural | 502 | 24.31 | 851 | 42.15 |