. 2008 Sep 22;7:51. doi: 10.1186/1476-072X-7-51

Table 3.

Clusters identified by the Poisson method stratified by mechanism

	Relative Risk	P-value	Number in Cluster
Total Injuries (# 1997)
1^st	1.67	0.001	428
2^nd	6.84	0.001	37
3^rd	2.41	0.001	125
4^th	2.36	0.001	57
Total			647 (32%)
Motor Vehicle Collision Injuries (# 413)
1^nd	2.80	0.001	130
2^rd	2.25	0.024	30
3^th	5.67	0.025	8
Total			168 (41%)
Pedestrian & Bicycle Injuries (# 219)
1^st	4.44	0.001	24
2^nd	10.65	0.001	11
Total			35 (16%)
Fall Injuries (# 1035)
1^st	8.97	0.001	25
2^nd	2.74	0.001	73
3^rd	2.32	0.005	40
4rd	2.27	0.013	35
Total			173 (17%)
Environmental Injuries (# 236)
1^st	7.99	0.002	9
Total			9 (4%)
Assault Injuries (# 94)
1^st	8.27	0.001	11
Total			11 (12%)