Table 4 Concurrent validity of the COHL (N = 370)
From: A new comprehensive oral health literacy scale: development and psychometric evaluation
| Â | Mean (SD) | P* |
|---|---|---|
Age (years) | Â | Â |
 18–44 | 18.5 ± 5.0 | < 0.001 |
 45–64 | 16.1 ± 5.2 |  |
 65–80 | 14.5 ± 4.7 |  |
Educational level | Â | Â |
 Less than primary school | 11.2 ± 4.5 | < 0.001 |
 Junior high school | 10.7 ± 4.1 |  |
 Senior high school or technical secondary school | 14.2 ± 5.1 |  |
 Junior college | 16.5 ± 4.8 |  |
 College/university diploma or higher | 18.4 ± 4.0 |  |
Monthly income (RMB yuan) | Â | Â |
 < 2000 | 14.0 ± 5.9 | 0.004 |
 < 4000 | 16.0 ± 5.1 |  |
 < 6000 | 16.6 ± 5.2 |  |
 < 8000 | 16.7 ± 4.5 |  |
 < 10,000 | 17.8 ± 4.5 |  |
 ≥ 10,000 | 18. 4 ± 3.9 |  |
Oral condition self-assessment | Â | Â |
 Good | 18.2 ± 5.0 | 0.013 |
 Moderate | 17.0 ± 4.7 |  |
 Poor | 15.9 ± 4.5 |  |