Fig. 1From: A parametric model to jointly characterize rate, duration, and severity of exacerbations in episodic diseasesSchematic illustration of model specification. This graph illustrates within (W’s) and between (B’s) exacerbation durations (gap times), exacerbation severity (S’s), and follow-up time termination (T) for a subject who had two exacerbations during the follow-up periodBack to article page