Fig. 1From: Time-varying associations between an exposure history and a subsequent health outcome: a landmark approach to identify critical windowsThree examples of trajectories of association between an exposure history from time −S to time 0 and a subsequent health outcome: (A) constant association, (B) time-varying with remote association or (C) time-varying with opposing remote and recent associations. The dashed horizontal lines represent the 0 associationBack to article page