Differences (early treatment group minus late treatment group) in the mean scores of developmental outcomes at age 3 years

Outcomes at 3 yearsScale*Difference in mean scores between groups (95% CI)
*PCC-R=percentage of consonants correct-revised; PPVT-R=Peabody picture vocabulary test-revised; NDW=number of different words; MLUm=mean length of utterances in morphemes; MGCI=McCarthy General Cognitive Index.
SpeechPCC-R−1 (−2.1 to 0.7)
LanguagePPVT-R 0 (−2.8 to 2.8)
NDW−2 (−7.6 to 4.8)
MLUm−0.1 (−0.2 to 0.0)
CognitionMGCI−2 (−4.1 to 1.1)
Parenting stressTotal stress−2 (−5.3 to 2.3)
Child behaviourTotal problems 1 (−0.6 to 3.4)