TABLE 3.

Effect of Adoption of Conductive Energy Devices (CEDs) on Monthly Suspect and Officer Injury Rates: Orlando, FL, and Austin, TX; 1998–2006 and 2002–2006

	Suspects		Officers
	IR (95% CI) or χ2	P	IR (95% CI) or χ2	P
Orlando, FL
CED use (n = 108)	0.47 (0.37, 0.59)	<.001	0.38 (0.23, 0.62)	<.001
Likelihood ratio	1311.97	<.001	2126.72	<.001
Austin, TX
CED use (n = 60)	0.70 (0.55, 0.88)	.002	0.75 (0.55, 1.02)	.069
Likelihood ratio	2598.28	<.001	3416.31	<.001

Note. CI = confidence interval; IR = incidence ratio. These models controlled for natural cubic spline of the monthly time series.