Table 2

Mean (SD) hospital inpatient days, by social class and period of life (n = 93657)*

Period of life	I				III-NM		III-M		IV		V
Period of life	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
*Only children alive at the start of the specified period were included within inpatient days estimates.
1st year:
Initial birth admission	3.79	3.66	3.71	3.84	3.86	5.37	3.75	5.42	3.91	4.79	3.85	4.68
Subsequent admissions	1.15	6.29	1.34	7.70	2.07	9.77	1.74	8.07	1.85	8.43	2.42	10.86
2nd year	0.16	1.39	0.24	2.26	0.37	2.72	0.31	3.39	0.32	3.70	0.48	2.98
3rd year	0.15	2.60	0.16	1.78	0.22	1.72	0.24	2.56	0.18	1.54	0.39	6.48
4th year	0.10	0.90	0.13	1.29	0.20	1.75	0.14	1.25	0.19	2.42	0.18	1.33
5th year	0.12	1.27	0.13	1.21	0.22	2.11	0.16	1.25	0.15	1.43	0.14	1.05
6th year	0.15	7.60	0.10	1.12	0.21	3.02	0.14	1.08	0.14	1.79	0.14	1.25
7th year	0.08	0.98	0.10	1.56	0.17	3.02	0.12	0.92	0.16	3.71	0.14	1.44
8th year	0.10	2.74	0.08	1.10	0.13	1.50	0.10	1.06	0.12	3.13	0.17	2.54
9th year	0.06	1.24	0.08	1.86	0.13	2.09	0.07	0.66	0.11	2.20	0.20	8.95
10th year	0.06	1.30	0.06	1.03	0.11	1.90	0.12	4.10	0.08	1.36	0.11	2.67