Table 3.

Lung cancer mortality^a in the United States by clustering category, 2004–2014, excluding Alaska and Hawaii.

	Lung cancer clustering category		Total
	Clustereda (N = 362)	Non-clustered (N = 2,746)	All counties (N = 3,108)
Lung cancer deathsb	142,380	1,612,527	1,754,907
Mean county population	336,652	931,526	862,239
Crude Lung cancer mortality rate (95%CI)	116.80 (116.20 – 117.40)	63.00 (62.90 – 63.10)	65.50 (65.40 – 65.60)
Age adjusted (95%CI)	99.70 (99.10 – 100.30)	75.60 (75.40 – 75.70)	78.20 (78.00 – 78.30)

^aAnnual deaths per 100,000 persons.

^bTotal number of deaths, identified using the International Classification of Diseases, 10^th Version codes for lung cancer.