Hassalbalch et al reported an equation for estimating the thymic index of a preterm neonate. The authors are from Hvidovre Hospital, The Royal Veterinary and Agricultural University and Copenhagen University Hospital in Denmark.
Patient selection: newborn with gestational age 34 to 37 weeks
Parameters:
(1) birth weight in grams
X =
= (0.00034 * (birth weight)) + 1.226
predicted thymic index =
= EXP(X)
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