Corresponding
numbers for the sensitivity analysis were OR 1.11
(1.01–1.22), 1.17 (1.06–1.29), and 1.15 (0.99–1.34), respectively.
See Fig. 2 and Table 1 for a full account of
the final model and sensitivity analysis.
The insignificant results of the Hosmer & Lemeshow
test (p = 0.505 and p = 0.707 for the main analysis and
the sensitivity analysis, respectively) suggested that the
models fitted the data well. Nagelkerke's R2 indicated
that the models were of fairly low explanatory value,
supported by the presence of some large residuals. The
area under the ROC curve (AUC) was 0.61 (95 % CI
0.60-0.62) for the main analysis and 0.62 (95 % CI 0.61-
0.63) for the sensitivity analysis, suggesting limited to
moderate explanatory value (see Figs. 3 and 4).