The second publication from the RCT (77 infants) reported on crude and adjusted odds of mental and psychomotor infant development status scores (adjusted for sex, birth weight, and intraventricular haemorrhage [IVH] grade) using Bayley Scales of Infant Development II (BSIDII; range: 0 to 100). Infants treated by DRIFT had significantly lower odds of a mental development index score of less than 55 (representing severe cognitive disability) at a mean follow-up of 25 months (crude odds ratio [OR] 0.31, 95% CI 0.11 to 0.86, p=0.024, adjusted OR 0.17, 95% CI 0.05 to 0.57). Infants treated by DRIFT had lower odds of a psychomotor development index score of less than 55 (representing severe psychomotor disability) at a mean follow-up of 25 months (crude OR 0.54, 95% CI 0.20 to 1.45, p=0.22, adjusted OR 0.21, 95% CI 0.05 to 0.85, p=0.028).