Table 2– Non-malignant respiratory disease mortality per 100 Bq·m⁻³ mean county-level residential radon concentrations at enrolment in 1982 follow-up 1982–2006, American Cancer Society Cancer Prevention Study-II.

Cause of death	ICD-9	ICD-10	Cohen data			LBL data
			Deaths n	Minimally adjusted#	Fully adjusted¶	Deaths n	Minimally adjusted#	Fully adjusted¶
Diseases of the respiratory system	460–519	J00-J98	20406	1.04 (0.98–1.09)	1.11 (1.05–1.17)	28300	1.01 (0.96–1.06)	1.08 (1.03–1.13)
Pneumonia and influenza	480–487	J10-J18	6440	1.06 (0.96–1.17)	1.08 (0.98–1.19)	9058	0.99 (0.91–1.07)	1.01 (0.92–1.10)
COPD and allied conditions	490–496	J19-J46	9664	1.02 (0.94–1.11)	1.14 (1.05–1.23)	13541	1.02 (0.95–1.09)	1.13 (1.05–1.21)
All other respiratory diseases	All not specified	All not specified	4302	1.03 (0.92–1.16)	1.07 (0.95–1.20)	5701	1.02 (0.92–1.13)	1.05 (0.95–1.16)

Data are presented as hazard ratio (95% confidence interval), unless otherwise stated. ICD: International Classification of Diseases; LBL: Lawrence Berkeley National Laboratory (Berkeley, CA, USA); COPD: chronic obstructive pulmonary disease. ^#: age, race, sex and state stratified. ^¶: age, race, sex and state stratified and adjusted for education, marital status, body mass index, body mass index squared, cigarette smoking status, cigarettes per day, cigarettes per day squared, duration of smoking, duration of smoking squared, age started smoking, passive smoking, vegetable/fruit/fibre consumption, fat consumption, industrial exposures, and occupation dirtiness index. Data of Cohen from [21, 22].