Table 4.
Logistic regression for tooth extraction due to caries
| Variable selected | Beta value (standard error) | Odds ratio (95s% CI) | p value |
|---|---|---|---|
| Age group (ref: ≤20) | |||
| 21–40 years | 1.1 (0.2) | 3 (2–4.4) | 0.0001* |
| 41–60 years | 0.7 (0.2) | 2.1 (1.3–3.2) | 0.001* |
| ≤61 years | 0.6 (0.2) | 1.8 (1.1–2.9) | 0.01* |
| Gender (ref: male) | |||
| Female | −0.2 (0.1) | 0.8 (0.6–0.9) | 0.008* |
| Marital status (ref: single) | |||
| Married | 0.3 (0.1) | 1.4 (1.1–1.8) | 0.002* |
| Education level (ref: complete secondary school and higher) | |||
| Incomplete secondary school | 0.1 (0.1) | 1.1 (0.8–1.3) | 0.51 |
| Primary school and lower | −0.3 (0.1) | 0.7 (0.5–0.9) | 0.01* |
| Smoking (ref: no) | |||
| Yes | 0.1 (0.1) | 1.1 (0.9–1.4) | 0.25 |
| Time of last dental visit (ref: less than 6 months) | |||
| 6 months to 1 year | 0.4 (0.1) | 1.5 (1–2) | 0.02* |
| More than 1 year | 0.4 (0.1) | 1.5 (1.2–1.8) | 0.0001* |
| Never before | 0.5 (0.3) | 1.6 (0.9–2.8) | 0.097 |
| Tooth type (ref: incisors and canines) | |||
| 1st, 2nd premolars and molars | 1 (0.1) | 2.9 (2.3–3.5) | 0.0001* |
| 3rd molars | 0.4 (0.1) | 1.5 (1.2–1.9) | 0.0001* |
| Having a previous extraction (ref: no) | |||
| Yes | 0.4 (0.1) | 1.5 (1.2–1.8) | 0.0001* |
*
The asterisk indicates the significance of parameter sets at 5.0s%.