Risk factors | Odds ratio (95% C.I.) | p-value |
---|---|---|
Mother’s education level | ||
Primary school level, ≤ 6 years | 2.51 (1.32, 3.53) | 0.003 |
Secondary school level or above, > 6 yearsa | ||
Monthly pocket money | < 0.001 | |
Less than 50RMB (~ US$ 7) | 3.75 (2.05, 6.86) | |
More than 50RMB (~ US$ 7) a | ||
Toothbrushing frequency (daily) | 0.004 | |
Less than twice | 2.41 (1.33, 4.39) | |
Twice or abovea |