Table 1. Perinatal characteristics and repeat thyroid tests in infants with Down syndrome (n=122).

Infant characteristics	Number (%) or mean±s.d.
Birth weight (kg)	2.66±0.82
Gestational age (weeks)	36.5±2.9
Congenital gastro intestinal disease	28 (23%)
Congenital heart disease	69 (57%)
Inborn	66 (54%)
Repeat TSH 3–120 days of life	80 (66%)
Repeat TSH not-tested	42 (34%)
Repeat TSH/TH (days)	36±37
Highest TSH (days)	36±40