Results of sensitivity analyses for the primary model from Table 4 on predictors of interest.

aBased on 4 imputed data sets; the fifth had estimated odds ratio (OR) = 0.bAll imputed data sets had estimated OR = 0.cBased on all 5 imputed data sets; none had estimated OR = 0.dThree of the imputed data sets had estimated OR = 0, precluding meaningful combination of just the remaining 2.eBased on 4 imputed data sets; the fifth had a nearly degenerate estimated OR = 0.09 with an effectively infinite standard error, precluding synthesis with the others.Abbreviations: HCV: hepatitis C virus.