Performance profile of children with a low average cognitive performance (BSID-III cognitive composite score ≤90) at 18–24 months assessed using two testing methods: the BSID-III and a summative measure of performance on the Babyscreen application
| BSID-IIIcc >90 (n=70) | BSID-IIIcc ≤90 (n=17) | P value* | |
| Cognitive composite | 105 (100 to 115) | 90 (82.5 to 90) | <0.001 |
| Language composite | 106 (100 to 117) | 97 (90 to 105) | 0.003 |
| Motor composite | 107 (100 to 112) | 97 (94 to 101) | <0.001 |
| Babyscreen score | 11 (8.5 to 13) | 7 (6 to 8.5) | 0.003 |
| BST z-score | 0.31 (−0.46 to 0.76) | −1.08 (−1.51 to −0.46) | 0.001 |
Babyscreen score=total number of touchscreen items completed without visual demonstration. BST z-score=age-adjusted Babyscreen z-score grouped by age 18–21 and 22–24 months. Values listed as median (IQR),
*P value=Mann-Whitney U between children with BSID-III >90 and those with BSID-III ≤90.