TABLE 2.

Summary of General Characteristics of the NICUs, Perinatal and Sociodemographic Variables, Separately Subdivided on the Basis of the Developmental Care Quality Level (Mean and SDs)

	ICC Index				IPM Index
	Low (NICU = 13) (n = 97, 47 F)		High (NICU = 12) (n = 81, 43 F)		Low (NICU = 11) (n = 91, 44 F)		High (NICU = 14) (n = 87, 46 F)
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Total admissions per year	406.58	224.45	675.46	475.50	471.36	226.00	641.91	536.22
Number of beds	19.08	9.27	22.92	12.96	20.79	10.06	21.46	13.17
Birth weight, g	1161.56	229.36	1091.75	258.16	1129.08	249.15	1130.54	241.36
Gestational age at birth, wk	29.12	1.96	28.81	2.41	28.97	2.02	29.00	2.35
Length of hospitalization, d	59.88	20.38	61.32	24.76	60.69	23.01	60.37	21.92
VON-RA score (range, 0.01 ÷ 0.99)	0.05	0.07	0.09	0.15	0.07	0.11	0.07	0.12
Postmenstrual age at test, wk	37.12	1.39	37.21	1.64	37.04	1.30	37.30	1.69
Chronological age at NNNS, d	52.94	16.69	55.70	19.40	53.32	16.78	55.11	19.19
Mother's age, y	33.31	5.02	33.92	4.61	33.27	4.95	33.92	4.72
Father's age, y	35.82	5.21	36.60	6.33	35.75	5.36	36.59	6.09
Education mother, y	12.42	3.90	12.97	3.73	12.36	4.14	12.98	3.47
Education father, y	11.39	3.38	11.72	3.62	11.42	3.53	11.66	3.46
SES score	50.83	23.47	53.33	18.44	49.89	23.26	54.19	18.88

F, female.