Fig. 1From: A Bayesian natural cubic B-spline varying coefficient method for non-ignorable dropoutDropout in the WIHS: Kaplan-Meier Curves for Study Dropout for (a) Untreated Subjects Reporting Hard Drug Use (Dashed) and Others (Solid) and (b) Treated Subjects Reporting Recreational Drug Use (Dashed) and Others (Solid). Histograms of dropout time are presented in panel (c)Back to article page