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. Author manuscript; available in PMC: 2013 Dec 1.
Published in final edited form as: Can J Stat. 2012 Nov 7;40(4):629–645. doi: 10.1002/cjs.11162

Figure 3.

Figure 3

Visualizing the optimal rule as a function of infant weight in the PROBIT study:—unadjusted; – – linear adjustment; … PS adjusted; · – · IPW. For values of infant weight where the line lies above 0, breastfeeding is considered optimal (zero is indicated by the horizontal grey line). Rugplot along x-axis indicates the observed distribution of the tailoring variable in the sample. (a) Interval 1: breastfeeding between 0 and 3 months as a function of birthweight. (b) Interval 2: breastfeeding between 3 and 6 months as a function of 3-month weight.