TABLE 2.
Select ZINB Model Results Used to Estimate the Adjusted Overall Mean Number of dmft and dt
| Explanatory Variables | Number of dmft | Number of dmft | Number of dmft | Number of dt | Number of dt | Number of dt |
|---|---|---|---|---|---|---|
| Logit Estimating Odds of Excess Zero dmft (n = 29 173), OR (95% CI) | NB Estimating Expected Number of dmft for Children at Risk of dmft (n = 13 966), IRR (95% CI) | Difference in Predicted Marginal Mean dmft, ME (95% CI) | Logit Estimating Odds of Excess Zero dt (n = 29 173), OR (95% CI) | NB Estimating Expected Number of dt for Children at Risk for dt (n = 7394), IRR (95% CI) | Difference in Predicted Marginal Mean dt, ME (95% CI) | |
| Number of visits (reference group = 0 visits) | ||||||
| 1 | 0.98 (0.88 to 1.08) | 0.99 (0.94 to 1.05) | 0.01 (−0.13 to 0.14) | 0.91 (0.79 to 1.05) | 0.95 (0.85 to 1.05) | 0.0004 (−0.0685 to 0.0692) |
| 2 | 1.11 (0.98 to 1.26) | 0.96 (0.90 to 1.03) | −0.18* (−0.32 to −0.03) | 0.97 (0.80 to 1.18) | 0.87* (0.77 to 0.97) | −0.09* (−0.18 to −0.003) |
| 3 | 0.97 (0.81 to 1.17) | 0.95 (0.86 to 1.05) | −0.09 (−0.28 to 0.11) | 0.93 (0.72 to 1.19) | 0.97 (0.81 to 1.16) | 0.01 (−0.11 to 0.13) |
| ≥4 | 1.07 (0.78 to 1.47) | 0.84* (0.76 to 0.94) | −0.39** (−0.68 to −0.11) | 0.96 (0.72 to 1.30) | 0.77 (0.55 to 1.09) | −0.16 (−0.35 to 0.03) |
Additional explanatory variables not presented in this table are described in the Methods section. *P < .05, **P < .001. IRR, incidence rate ratio; ME, marginal effect based on “average predicted value” method38; NB, negative binomial; OR, odds ratio.