| Intervention | Control | |||
| 3 months (n = 39) | 9 months (n = 34) | 3 months (n = 42) | 9 months (n = 37) | |
| MDI | 91 (63 to 119) | 91 (72 to 110) | 87 (74 to 100) | 91 (73 to 109) |
| PDI | 84 (66 to 102) | 90 (67 to 113) | 82 (67 to 97) | 88 (69 to 107) |
| OFC (cm) | 40.3 (38.4 to 42.2) | 44.6 (42.6 to 46.6) | 40.5 (38.4 to 42.6) | 45.4 (42.4 to 48.4) |
| OFC SDS | −0.1 (−1.8 to 1.6) | −1.6 (−3.9 to 0.8) | 0.1 (−1 to 1.2) | −0.8 (−2.7 to 1.3) |
| Length (cm) | 57.7 (53.6 to 61.9) | 69.0 (65 to 73) | 58.9 (55.1 to 62.7) | 69.3 (65.3 to 73.3) |
| Length SDS | −0.9 (−2.6 to 0.8) | −1.2 (−2.8 to 0.4) | −0.8 (−2.5 to 0.9) | −0.7 (−2.2 to 0.8) |
| Weight (kg) | 5.6 (4.6 to 6.6) | 7.8 (6.8 to 8.8) | 5.6 (4.6 to 6.5) | 8.2 (6.7 to 9.7) |
| Weight SDS | −0.6 (−1.7 to 0.5) | −1.4 (−2.7 to 0.1) | −0.4 (−1.8 to 1) | −0.8 (−2.7 to 1.2) |
Figures shown are medians with interquartile range in brackets; all not statistically significant.
MDI, mental developmental index; OFC, occipitofrontal circumference; PDI, psychomotor developmental index; SDS, standard deviation scores.