Relative risks and 95% confidence intervals for lung cancer overall and by period of discharge from the United States Veterans Affairs Inpatient Cohort: White males with at least one hospital admission between July 1, 1969, and September 30, 1996.

Abbreviations: RR, relative risk; CI, confidence interval; COPD, Chronic Obstructive Pulmonary Disease; ICD, International Classification of Disease.aICD-8 & ICD-9, code 296; which includes depression and bipolar disease.bICD-8 & ICD-9, codes 291, 303, 305.0, 535.3, 571.0–571.3, 980.0.cICD-8 & ICD-9, codes 304–305.dICD-8 & ICD-9, codes 490–492.eICD-8 & ICD-9, code 295.Note: Numbers of participants may not sum to total due to missing data.缩写说明：RR为相对危险度（relative risk）；CI为置信区间（confidence interval）；COPD为慢性阻塞性肺疾病（Chronic Obstructive Pulmonary Disease）；ICD为国际疾病分类（International Classification of Disease）。 a. ICD-8与ICD-9编码296，涵盖抑郁症与双相情感障碍。 b. ICD-8与ICD-9编码291、303、305.0、535.3、571.0–571.3、980.0。 c. ICD-8与ICD-9编码304–305。 d. ICD-8与ICD-9编码490–492。 e. ICD-8与ICD-9编码295。 注：因存在缺失数据，参与者人数分项之和可能与总例数不符。