Table 7. Estimated effects of age when added to the primary model from Table 4, for the original data and for simulated data with no age effects.

		Odds	95% confidence interval
Predictor(s)a	Value	Ratio	Lower	Upper	P-value
Models of the original, actual data
Current age at each time step	Per 10 years	1.33	1.15	1.54	0.0002
Age at HCV infection	Per 10 years	1.31	1.13	1.52	0.0003
Current age at each time step	Per 10 years	1.45	0.74	2.8	0.28
Age at HCV infection	Per 10 years	0.92	0.47	1.79	0.80
Models of simulated data with no actual age effects
Current age at each time step	Per 10 years	1.08	0.88	1.31	0.46
Age at HCV infection	Per 10 years	1.07	0.90	1.27	0.45
Replication on another independently simulated set of data with no actual age effects
Current age at each time step	Per 10 years	1.03	0.87	1.22	0.74
Age at HCV infection	Per 10 years	1.02	0.87	1.20	0.77

^aResults separated by vertical space are from separate models; one model included both current age and age at HCV infection.

Abbreviations: HCV: hepatitis C virus.