Table 3.

Percentiles of FT4 values (pmol/L) based on different PMA in preterm infants with GA < 32 weeks.

PMA, week	No. FT4 values	FT4 percentile
		2.5th	5th	50th	95th	97.5th
26–27	22	5.23	5.91	8.72	17.90	20.85
28	50	5.47	6.57	12.05	20.33	20.93
29	98	6.73	8.38	14.41	21.76	22.01
30	195	7.46	8.73	15.50	24.40	26.18
31	305	8.78	10.00	16.00	22.85	23.40
32	438	9.63	10.48	16.33	24.59	26.20
33	354	9.77	10.78	16.70	24.35	26.01
34	280	9.52	10.46	16.59	23.77	25.91
35	141	10.29	10.90	16.89	24.17	25.90
36	226	8.59	10.68	16.80	23.35	25.98
37	38	9.90	12.16	17.45	23.23	23.66
38–40	47	10.87	11.23	17.65	24.09	24.19
Total	2,194	8.53	9.83	16.21	23.78	25.80