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Acta Ophthalmol Scand. 2000 Jun;78(3):359-61.

Retinopathy of prematurity, a decrease in frequency and severity. Trends over 16 years in a Danish county.

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1
Eye Department, Hillerod Sygehus, Copenhagen, Denmark.

Abstract

PURPOSE:

To analyse the trends over 16 years (1982-97) in a Danish county regarding the clinical appearance of retinopathy of prematurity (ROP).

METHODS:

The data for birth years 1993-97 regarding the regular ophthalmic surveillance for ROP in the region have been analysed. With gestational age (GA) 32 weeks and/or a birthweight (BW) 1750 g as attempted screening limits a total of 177 premature infants were surveyed. Comparison was made with studies of a similar set-up from the preceding four 3-year periods comprising a total of 814 subjects.

RESULTS:

The number of survivors regarded at a higher risk of developing ROP (GA and BW both <32 weeks/1750 g, n=478) showed an even increase over the five investigation periods. The ROP frequency, however, fell from a level of 39% to 10%, there were fewer with severe sequels to ROP, and the children surveyed 'above limits' eventually avoided ROP.

CONCLUSIONS:

Using the ROP profile as a yardstick for the quality of the neonatal service given to the most immature newborns over the period 1982-97, the risk limits regarding GA and BW have gone down. More and more of the heavier preterm babies now escape ROP. A significant decrease in frequency of ROP in the more immature groups has been observed, and fewer cases have progressed to visual impairment.

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