Number of blocks used in towers built by the three groups of 2 year old children whose birth weight was < 2500 g; values are mean (SD)
| Group 1 | No of children | Group 2 | No of children | Group 3 | No of children | |
|---|---|---|---|---|---|---|
| Boys | 6.6 (2.0) | 18 | 4.2 (1.5) | 5 | ND6-150 | 2 |
| Girls | 5.9 (2.5) | 20 | 5.5 (1.6) | 6 | 10.0 (-) | 2 |
↵6-150 ND = not done because of reluctance to do the test.