Table 2

Sensitivity and predictive value positive of the Medical Examiner and Vital Statistics Office systems for identifying violent injury deaths compared with a standard definition, Oklahoma 2001

	Standard
	Homicide		Suicide		Unintentional firearm
	Yes	No	Yes	No	Yes	No
*True positive violent injury death: the surveillance system identified the death as the specified manner of violent injury death and the death met the study definition for that manner of violent injury death.
†False positive violent injury death: the surveillance system identified the death as the specified manner of violent injury death but the death did not met the study definition for that manner of violent injury death.
‡False negative violent injury death: the surveillance system did not identify the death as the specified manner of violent injury death but the death met the study definition for that manner of violent injury death.
§True negative: the surveillance system did not identify the death as the specified manner of violent injury death and the death did not meet the study definition for that manner of violent injury death.
Note: An individual violent injury death that was miscoded in terms of homicide, suicide, and unintentional death may appear in more than one 2 × 2 table presented above (for example, a firearm suicide miscoded as an unintentional firearm death will appear as a false negative in the suicide 2 × 2 and as a false positive in the unintentional firearm 2 × 2).
Medical Examiner
Yes	246*	13†	515*	0†	9*	0†
No	2‡	2382§	4‡	2124§	0‡	2634§
	Sensitivity = 99.2%		Sensitivity = 99.2%		Sensitivity = 100%
	PVP = 95.0%		PVP = 100%		PVP = 100%

Vital Statistics Office
Yes	225*	2†	483*	5†	9*	20†
No	23‡	2393§	36‡	2119§	0‡	2614§
	Sensitivity = 90.7%		Sensitivity = 93.1%		Sensitivity = 100%
	PVP = 99.1%		PVP = 99.0%		PVP = 31.0%