TABLE 1.

Cutoff Limits in 1998 and 1999

YearBirth Weight (g)Gestational Age (Weeks)Cutoff Limit
nmol/L Serumμg/L Serum
1998≤2500 and≤32≥500≥165
>32–36≥300≥100
>36 or unknown≥240≥80
>2500 or unknown≥60≥20
1999*≤33+6≥500≥165
34–37≥200≥66
≥37≥80≥26
  • * In 11 cases, 17OHP was ≥80 nmol/L and gestational age was not reported on the filter paper. In these cases, cutoff levels based on birth weight were used (birth weight ≤2100 g; ≥500, birth weight between 2101 and 2500 g; ≥200, birth weight >2500 g; ≥80 nmol/L serum).