Table 1.
Mean number of teeth extracted according to patients’ gender, age and education level
| Previous extraction | Extraction on the day of survey | Total | |
|---|---|---|---|
| Gendera | |||
| Male (n = 673) | 5.1 ± 0.3 | 2.2 ± 0.1 | 7.3 ± 0.3 |
| Female (n = 709) | 3.8 ± 0.2 | 1.6 ± 0.04 | 5.4 ± 0.2 |
| Age group in yearsb | |||
| ≤20 (n = 142) | 0.5 ± 0.1 | 1.6 ± 0.1 | 2.1 ± 0.1 |
| 21–30 (n = 443) | 1.2 ± 0.1 | 1.7 ± 0.1 | 2.9 ± 0.1 |
| 31–40 (n = 245) | 3.3 ± 0.3 | 1.5 ± 0.1 | 4.8 ± 0.3 |
| 41–50 (n = 242) | 6.2 ± 0.4 | 2.3 ± 0.1 | 8.5 ± 0.4 |
| 51–60 (n = 176) | 8.1 ± 0.5 | 2.3 ± 0.2 | 10.4 ± 0.6 |
| 61–70 (n = 85) | 11.2 ± 0.9 | 2.3 ± 0.2 | 13.5 ± 1.0 |
| ≤71 (n = 49) | 16.1 ± 1.4 | 2.1 ± 0.2 | 18.2 ± 1.5 |
| Education levelb | |||
| Complete secondary school and higher (n = 446) | 2.5 ± 0.2 | 1.7 ± 0.1 | 4.3 ± 0.2 |
| Incomplete secondary school (n = 772) | 4.4 ± 0.2 | 1.8 ± 0.1 | 6.2 ± 0.2 |
| Primary school and lower (n = 164) | 9.5 ± 0.7 | 2.4 ± 0.1 | 11.9 ± 0.7 |
| Total (n = 1,382) | 4.4 ± 0.2 | 1.9 ± 0.5 | 6.3 ± 0.2 |
a
t test: p < 0.001.
b
ANOVA: p > 0.001.