CLINICAL ASSESSMENT OF GESTATIONAL AGE IN THE NEWBORN INFANT.

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Abstract
The Dubowitz and Parkin scoring systems were evaluated in 2 selected materials of newborn [human] infants referred to a neonatal unit. Estimation of gestational age by Dubowitz scores tended to be too high for the extreme prematures. Small-for-dates were also overestimated, appropriate-for-dates and infants with respiratory difficulties were underestimated. Large-for-dates fell close to the standard curve. Ninety-five percent confidence limits were up to .+-.5 wk for Dubowitz scores and nearly .+-.6 wk for Parkin scores. Further statistical analysis displayed some limitations in the use of linear regression formulas for scoring systems based on external and/or neurological characteristics. Results obtained with these methods must be used with caution in some selected newborn materials.

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