Table 3. Logistic regression analysis for association between disability and dental caries.
| DMFT | DMFT | OR (95% CI) | ||||
|---|---|---|---|---|---|---|
| Independent variable | ≤50th percentile | ≥50th percentile | ≤75th percentile | ≥75th percentile | ≥50th percentile | ≥75th percentile |
| Type of disability | ||||||
| Non-disabled | 1342 (45.4) | 1613 (54.6) | 2191 (74.1) | 764 (25.9) | ||
| Physically disabled | 74 (40.0) | 111 (60.0) | 115 (62.2) | 70 (37.8) | 0.99 (0.69–1.42) | 1.19 (0.81–1.74) |
| Mentally disabled | 231 (33.4) | 460 (66.6) | 400 (57.9) | 291 (42.1) | 1.13 (0.88–1.44) | 1.34 (1.03–1.74) |
| Multiply disabled | 35 (32.1) | 74 (67.9) | 60 (55.0) | 49 (45.0) | 1.44 (0.91–2.29) | 1.75 (1.11–2.76) |
| Gender | ||||||
| Male | 1,281 (45.9) | 1,507 (54.1) | 2,015 (72.3) | 773 (27.7) |
||
| Female | 401 (34.8) | 751 (65.2) | 751 (65.2) | 401 (34.8) | 1.92 (1.64–2.25) | 2.02 (1.71–2.39) |
| Education | ||||||
| ≤Elementary school | 646 (51.8) | 602 (48.2) | 889 (71.2) | 359 (28.8) | ||
| Middle school | 240 (45.5) | 288 (54.5) | 397 (75.2) | 131 (24.8) | 1.37 (1.09–1.71) | 0.94 (0.72–1.21) |
| High school | 680 (38.0) | 1,108 (62.0) | 1,245 (69.6) | 543 (30.4) | 1.48 (1.22–1.79) | 1.07 (0.86–1.32) |
| ≥College | 116 (30.9) | 260 (69.1) | 235 (62.5) | 141 (37.5) | 1.83 (1.38–2.42) | 1.25 (0.94–1.67) |
| Health security system | ||||||
| National health insurance* | 1,471 (45.1) | 1,788 (54.9) | 2,404 (73.8) | 855 (26.2) |
||
| Medical aid type 1 | 175 (29.5) | 418 (70.5) | 295 (49.7) | 298 (50.3) | 1.35 (1.00–1.82) | 1.65 (1.22–2.22) |
| Medical aid type 2 | 36 (40.9) | 52 (59.1) | 67 (76.1) | 21 (23.9) | 1.14 (0.71–1.83) | 0.78 (0.61–0.89) |
| Region | ||||||
| Urban | 1,264 (41.0) | 1,820 (59.0) | 2,124 (68.9) | 960 (31.1) |
||
| Suburban | 418 (48.8) | 438 (51.2) | 642 (75.0) | 214 (25.0) | 0.71 (0.60–0.84) | 0.74 (0.61–0.89) |
Additional independent variables included in this model were age (7 categories) and income (5 categories), both of which were statistically significant (P<0.01).
*The Medical Aid classifies beneficiaries into two categories, type 1 and 2, on the basis of being incapable (those under 18 or 65 years of age, or disabled) or capable (type 2) of working respectively in Korea.