Figure 1.

Achievement of Language and Motor milestones in Sex Chromosome Trisomy compared to the general population

*: Trisomy is delayed compared to simulated data based on general population percentiles, under the assumption of a non-normal distribution. Significance level = 0.05. Differences tested with Wilcoxon Rank-Sum Tests.

General Population estimates are based on Denver II for Jumping, Running, Walking, Sitting, 2 Word Phrases, First Words, Babbling, and Cooing; WHO for Cruising and Crawling; and PRP for Rolling Back to Front and Rolling Front to Back.^12–14