To assist in future clinical decision making, this decision tree shows the probability of successful treatment (with 95% CIs) with EOT only (before patching) on the basis of study participants' demographic and clinical characteristics. We included 163 children in the EOT group and used the recursive partitioning method. The sample of 163 participants included 149 children who had BCVA measurements available after 18 weeks of glasses use (including two participants who continued to wear glasses for 23 weeks and 24 weeks and were excluded from the primary outcome analysis after 12 weeks of patching) and 14 children who had dropped out before measurements were obtained at 18 weeks of glasses use. Using recursive partitioning, we identified the optimal split of predictor variables that would partition the data into outcome groups (successful treatmentvsunsuccessful treatment). Finally, sensitivity and specificity of the decision tree for predicting successful treatment during the EOT period was calculated. Age, amblyopic eye BCVA at baseline, and interocular difference in spherical equivalent remained in the model. BCVA=best corrected visual acuity. EOT=extended optical treatment. logMAR=logarithm of the minimum angle of resolution.
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