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Table 1 Demographics of infants with initial and delayed thyroid-stimulating hormone elevations and control

From: Initial and delayed thyroid-stimulating hormone elevation in extremely low-birth-weight infants

Variable Initial TSH Elevation (N = 5) Delayed TSH Elevation (N = 42) Control (N = 251)
Gestational age (weeks) 26.0 ± 1.2 25.0 ± 1.5* 26.8 ± 1.9
(25+ 0–28+ 6) (23+ 0–28+ 3) (24+ 0–34+ 4)
Birth weight (g) 789 ± 88 692 ± 142* 839 ± 120
(648–884) (470–990) (380–999)
Male sex 3 (60) 15 (35) 108 (43)
One-minute Apgar score 3.0 ± 1.4 4.3 ± 1.7 4.8 ± 1.7
Five-minute Apgar score 5.6 ± 1.5*, † 7.2 ± 1.2 7.2 ± 1.4
Delivery type C/sec 5 (100) 32 (76) 206 (82)
Small for gestational age 1 (20) 10 (24) 66 (26)
Antenatal steroids 1 (20)*, † 36 (86) 200 (80)
Pathologic chorioamnionitis 1 (20) 13 (31) 116 (46)
Pregnancy-induced hypertension 3 (60) 7 (17) 62 (25)
Gestational diabetes mellitus 0 (0) 1 (2) 9 (4)
  1. Values are presented as means ± SD (range) or n (%)
  2. TSH Thyroid-stimulating hormone, HD Hospital day
  3. *P < 0.05, vs Control
  4. P < 0.05, vs Delayed TSH elevation