Parameter estimate (SE) | p Value | OR (95% CI) | |
---|---|---|---|
Attitudes | |||
Rubber dam effectiveness | 1.43 (0.11) | <0.001 | 4.17 (3.35 to 5.18) |
Inconvenient/time-consuming | −0.78 (0.08) | <0.001 | 0.46 (0.39 to 0.54) |
Ease of placement | 0.50 (0.08) | <0.001 | 1.65 (1.42 to 1.93) |
Rubber dam effectiveness compared to Isolite | −1.17 (0.09) | <0.001 | 0.31 (0.26 to 0.36) |
Patient factors | 0.43 (0.08) | <0.001 | 1.52 (1.31 to 1.76) |
Dentist and practice characteristics | |||
Endodontist in same building | 0.46 (0.46) | 0.32 | 1.58 (0.65 to 3.87) |
Public health practice model (reference is large group practice) | −1.21 (0.43) | 0.01 | 0.30 (0.13 to 0.69) |
Private practice model (reference is large group practice) | −1.07 (0.28) | <0.001 | 0.34 (0.20 to 0.59) |
Dentist gender (male) | −0.21 (0.18) | 0.26 | 0.81 (0.57 to 1.17) |
Decades since dental school graduation | −0.17 (0.07) | 0.02 | 0.85 (0.74 to 0.97) |
Any additional training since dental school | 0.26 (0.15) | 0.08 | 1.30 (0.97 to 1.73) |
Rural work setting | −0.44 (0.20) | 0.03 | 0.64 (0.44 to 0.95) |
Does fewer than 10 root canals each month | −0.37 (0.16) | 0.02 | 0.69 (0.51 to 0.94) |
The outcome of interest is whether or not the dentist uses a rubber dam all of the time during root canal treatment.
The regression is adjusted for differences in dentist gender (female=0, male=1); decades since dental school graduation truncated at 30+ coded (0–9=1, 10–19=2, 20–29=3, 30+=4); additional training since dental school (no training=0, additional=1); practice type (large group practice=0, private practice=1, public health/government/other=1); whether the practice is located in a rural setting (urban/suburban=0, rural=1); whether an endodontist is located in the same building as the practice (no=0, yes=1); and whether the dentist does fewer than 10 root canal treatments each month (10 or more=0, <10=1).
The model fit was statistically significant (n=1445, χ2=802.7, p<0.001 with df=13). Nagelkerke's R2 of 0.57. The prediction success overall was 80% (80% for using a rubber dam all the time and 80% for not using the rubber dam all the time).