Differences (early treatment group minus late treatment group) in the mean scores of developmental outcomes at 3 years†
| Outcomes | Scale | Early v late | Difference in mean score between groups (95% CI) | Normative data (SD) |
|---|---|---|---|---|
| †MGCI = McCarthy general cognitive index; MLUM = mean length of utterances in morphonemes; NDW = number of different words; PCC-R = percentage of consonants correct, revised; PPVT-R = Peabody picture vocabulary test, revised; SD = standard deviation. | ||||
| Speech | PCC-R | 85 v 86 | −1 (−2.1 to 0.7) | — |
| Language | PPVT-R | 92 v 92 | 0 (−2.8 to 2.8) | 100 (15) |
| NDW | 124 v 126 | −2 (−7.6 to 4.8) | — | |
| MLUM | 2.7 v 2.8 | −0.1 (−0.2 to 0.0) | — | |
| Cognition | MGCI | 99 v 101 | −2 (−4.1 to 1.1) | 100 (15) |
| Parenting stress | Total stress | 66 v 68 | −2 (−5.3 to 2.3) | 71 (15) |
| Child behaviour | Total problems | 50 v 49 | 1 (−0.6 to 3.4) | 50 (10) |