Table 2.

Centiles (10th−95th) of serum creatinine values (enzymatic assay) in a cohort of 217 extremely low birth weight (ELBW) infants in the first 28 days of postnatal age (38).

	Day 1	Day 2	Day 3	Day 4	Day 5	Day 6	Day 7	Day 8	Day 9	Day 10	Day 11	Day 12	Day 13	Day 14
Samples	206	190	205	198	182	171	145	157	140	128	117	112	92	133
10th	0.45	0.64	0.74	0.64	0.58	0.55	0.54	0.50	0.50	0.44	0.42	0.41	0.41	0.41
25th	0.52	0.75	0.81	0.76	0.7	0.67	0.64	0.60	0.57	0.55	0.51	0.50	0.47	0.48
50th	0.605	0.86	0.91	0.88	0.84	0.80	0.75	0.74	0.70	0.65	0.64	0.60	0.59	0.57
75th	0.74	0.95	1.03	1.03	0.97	0.94	0.89	0.88	0.83	0.79	0.79	0.76	0.70	0.66
90th	0.91	1.065	1.18	1.18	1.14	1.12	1.11	1.04	1.01	0.93	0.96	0.87	0.86	0.8
95th	0.98	1.16	1.22	1.29	1.25	1.28	1.17	1.12	1.15	1.05	1,03	0.92	0.96	0.85
	Day 15	Day 16	Day 17	Day 18	Day 19	Day 20	Day 21	Day 22	Day 23	Day 24	Day 25	Day 26	Day 27	Day 28
Samples	101	96	99	79	85	62	123	72	66	86	64	50	54	111
10th	0.36	0.36	0.37	0.35	0.38	0.37	0.36	0.37	0.36	0.35	0.33	0.34	0.32	0.32
25th	0.44	0.44	0.43	0.42	0.42	0.40	0.39	0.40	0.40	0.41	0.38	0.37	0.37	0.36
50th	0.55	0.52	0.51	0.49	0.49	0.50	0.47	0.46	0.47	0.47	0.43	0.45	0.44	0.42
75th	0.63	0.61	0.60	0.61	0.57	0.62	0.54	0.54	0.54	0.52	0.52	0.51	0.50	0.48
90th	0.81	0.69	0.71	0.73	0.66	0.68	0.62	0.68	0.64	0.64	0.58	0.59	0.70	0.55
95th	0.87	0.73	0.78	0.81	0.73	n.a.	0.68	0.72	n.a.	0.67	n.a.	n.a.	n.a.	0.59

The numbers in bold and italic represent the 50th centile, or the median.