Figure 2.

Summary of available data for the participating children by subgroup and health status. Diagonal pattern fill: treatment and data collection. Solid fill: data collection only. Rightward arrow: continues in the study. Rightward vertical line: withdrew from the study. Dashed line: start of follow-up testing. CDI = MacArthur–Bates Communicative Development Inventories–Second Edition; CG = classic galactosemia; Expr. = expressive; GFTA-3 = Goldman-Fristoe Test of Articulation–Third Edition; MBL = mean babbling level; PLS-5 = Preschool Language Scales–Fifth Edition; RQ = research question; SSL = syllable structure level.