TABLE 1—

Sensitivity and Classification Ratios for Death Certificates That Linked to IHS: IHS-NVSS Mortality Files, United States, 1990–2009

	No. AI/AN CHSDA Deaths		No. AI/AN Non-CHSDA Deaths		Sensitivitya		Classification Ratiob
Group	IHS	DC	IHS	DC	CHSDA	Non-CHSDA	CHSDA	Non-CHSDA
Male and Femalec	170 743	142 675	16 794	9205	83.6	54.8	1.2	1.82
Male	94 538	79 690	9035	5050	84.3	55.9	1.19	1.79
Female	76 205	62 985	7759	4155	82.7	53.6	1.21	1.87
Northern Plainsc	33 804	31 053	4960	3678	91.9	74.2	1.09	1.35
Alaskad	13 782	12 888	NA	NA	93.5	NA	1.07	NA
Southern Plainsc	42 615	27 834	3223	1237	65.3	38.4	1.53	2.61
Southwestc	51 910	48 953	1373	992	94.3	72.3	1.06	1.38
Pacific Coastc	23 292	17 505	3454	1828	75.2	52.9	1.33	1.89
Eastc	5340	4442	3784	1470	83.2	38.8	1.2	2.57
Urbanc	65 551	51 001	12 658	7008	77.8	55.4	1.29	1.81
Ruralc	105 092	91 577	4136	2197	87.1	53.1	1.15	1.88

Note. AI/AN = American Indian and Alaska Native; CHSDA = Contract Health Service Delivery Area; DC = death certificate; IHS = Indian Health Service; NA = not applicable; NVSS = National Vital Statistics System. Data from 50 states and the District of Columbia. Analyses include AI/AN persons of Hispanic origin and are limited to decedents who linked to IHS.

Source. IHS-NVSS Mortality Files.

^aPercentage of IHS decedents also coded as AI/AN on the death certificate of all IHS decedents.

^bRatio of the total number of decedents classified as AI/AN in IHS to the total number of decedents classified as AI/AN on the death certificate.

^cChi-square test indicates statistically significant differences between the number of AI/AN deaths in CHSDA and non-CHSDA counties, P < .01.

^dAll counties are CHSDA counties.