Table 4.
Gingival bleeding risk factors of the 12-year-old Lisu children (multivariate logistic regression model, N = 482)
| 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 |
RMB Renminbi (Chinese Yuen), US$ U.S. Dollar
aReference group