AIM. `Newborn Individualized Developmental Care and Assessment Program' (NIDCAP
Ò) was introduced in the care of extreme preterm infants. Consequently the effects on the preterm infant, parents and nurses were evaluated. METHOD. A time lag intervention study was performed on a level III NICU. Data on preterm infants born before 30 weeks gestational age (N=49), their parents (N=39) and IC neonatology nurses (N=70) before and after NIDCAPÒ introduction were analysed. Primary outcome measures included length of stay and neurobehavioral development at the age of 12 months correct for prematurity (BSID). The amount of support perceived by (NPST) and satisfaction of parents (NICU-PSF) as well as the satisfaction of the nurses (IWS) were assessed. FINDING. The length of stay in the NICU was comparable. The neurobehavioral development did not show any difference. The study showed an increase of the amount of support perceived by parents (4.10 versus 4.26), and a significant increase (p=0.041) of parent satisfaction. Job satisfaction of the nurses did not differ (14.4 versus 14.5). CONCLUSION. The study did not show the expected decrease of length of stay and improved neurobehavioral development. Several confounding factors could be the cause of this and should be studied further with linear regression analysis. Future research should possibly direct more to the dignity of the intervention instead of its medical usefulness.