Variable | n | % | Crude ORa (95% CI) | P value | Adjusted ORb (95% CI) | P value |
---|---|---|---|---|---|---|
Dentist-related factors | ||||||
Gender | ||||||
Female | 347 | 9.9 | Ref. | |||
Male | 955 | 9.5 | 1.0 (0.8–1.1) | 0.496 | 1.1 (1.0–1.3) | 0.111 |
Years of experience | ||||||
< 5 | 309 | 8.0 | Ref. | |||
6–15 | 287 | 8.6 | 1.1 (0.9–1.3) | 0.330 | 1.4 (1.1–1.7) | 0.000 |
16–25 | 143 | 6.1 | 0.8 (0.6–0.9) | 0.007 | 1.1 (0.8–1.3) | 0.805 |
> 25 | 563 | 14.0 | 1.9 (1.6–2.2) | 0.000 | 2.2 (2.0–2.6) | 0.000 |
Professional registration | ||||||
General dental practitioners | 798 | 13.0 | Ref. | |||
Endodontists | 155 | 11.4 | 0.9 (0.7–1.0) | 0.110 | 0.9 (0.7–1.0) | 0.141 |
Oral surgeons | 22 | 1.2 | 0.1 (0.1–0.1) | 0.000 | 0.1 (0.0–0.1) | 0.000 |
Prosthodontists | 137 | 10.6 | 0.8 (0.7–1.0) | 0.017 | 0.8 (0.6–0.9) | 0.006 |
Periodontists | 81 | 7.3 | 0.5 (0.4–0.7) | 0.000 | 0.5 (0.4–0.7) | 0.000 |
Othersc | 109 | 5.8 | 0.4 (0.3–0.5) | 0.000 | 0.4 (0.3–0.5) | 0.000 |
Tooth-related factors | ||||||
Tooth position | ||||||
Incisor | 373 | 8.2 | Ref. | |||
Premolar | 352 | 7.8 | 0.9 (0.8–1.1) | 0.431 | 0.9 (0.8–1.1) | 0.405 |
Molar | 577 | 12.8 | 1.6 (1.4–1.9) | 0.000 | 1.7 (1.5–2.0) | 0.000 |
Coronal status | ||||||
Cavity | 671 | 9.9 | Ref. | |||
Full veneer crown | 631 | 9.3 | 0.9 (0.8–1.0) | 0.205 | 0.9 (0.8–1.0) | 0.206 |
Root canal filling status | ||||||
Absent | 499 | 7.3 | Ref. | |||
Underfilling | 803 | 11.9 | 1.7 (1.5–1.9) | 0.000 | 1.8 (1.6–2.0) | 0.000 |
Size of periapical radiolucency | ||||||
Small | 107 | 2.4 | Ref. | |||
Medium | 290 | 6.4 | 2.8 (2.2–3.5) | 0.000 | 2.8 (2.2–3.5) | 0.000 |
Large | 905 | 19.9 | 10.1 (8.3–12.4) | 0.000 | 10.4 (8.5–12.8) | 0.000 |