Table 3

Frequency and count of individual risk criteria for all children, aged <3 years and 3 to <18 years

Criterion	<3 years				3 to <18 years				Total
	No ICI		ICI		No ICI		ICI		No ICI		ICI
	n	%	n	%	n	%	n	%	n	%	n	%
N	7743		129		11 989		248		19 732		377
Risk criteria count
0	3503	45.2	0	0.0	5817	48.5	4	1.6	9320	47.2	4	1.1
1	2899	37.4	9	7.0	4003	33.4	44	17.7	6902	35.0	53	14.1
2	969	12.5	40	31.0	1466	12.2	59	23.8	2435	12.3	99	26.3
3	283	3.7	44	34.1	500	4.2	73	29.4	783	4.0	117	31.0
4	73	0.9	25	19.4	167	1.4	49	19.8	240	1.2	74	19.6
5	15	0.2	9	7.0	34	0.3	17	6.9	49	0.2	26	6.9
6	1	0.0	2	1.6	2	0.0	2	0.8	3	0.0	4	1.1
7	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0
Risk criteria
1. Evidence of skull fracture	394	5.1	93	72.1	1425	11.9	121	48.8	1819	9.2	214	56.8
Missing	95	1.2	0	0.0	144	1.2	1	0.4	239	1.2	1	0.3
2. Scalp haematoma	2796	36.1	91	70.5	3272	27.3	126	50.8	6068	30.8	217	57.6
Missing	1	0.0	0	0.0	2	0.0	0	0.0	3	0.0	0	0.0
3. Neurological deficits	181	2.3	16	12.4	404	3.4	25	10.1	585	3.0	41	10.9
Missing	2	0.0	0	0.0	2	0.0	0	0.0	4	0.0	0	0.0
4. Altered levels of alertness	604	7.8	66	51.2	1059	8.8	169	68.2	1663	8.4	235	62.3
Missing	1	0.0	0	0.0	0	0.0	0	0.0	1	0.0	0	0.0
5. Abnormal behaviour	1372	17.7	75	58.1	2010	16.8	141	56.9	3382	17.1	216	57.3
Missing	1	0.0	0	0.0	1	0.0	0	0.0	2	0.0	0	0.0
6. Persistent vomiting	756	9.8	22	17.1	1263	10.5	76	30.7	2019	10.2	98	26.0
Missing	3	0.0	0	0.0	1	0.0	0	0.0	4	0.0	0	0.0
7. Coagulopathy	111	1.4	2	1.6	195	1.6	9	3.6	306	1.6	11	2.9
Missing	0	0.0	0	0.0	1	0.0	0	0.0	1	0.0	0	0.0

ICI, intracranial injury.