Table 7. Cause of Death on the Death Certificate, According to Screening Group*.
| Cause of Death | Low-Dose CT Group | Radiography Group | Total |
|---|---|---|---|
| number/total number (percent) | |||
| Neoplasm of bronchus and lung† | 427/1865 (22.9) | 503/1991 (25.3) | 930/3856 (24.1) |
| Other neoplasm | 416/1865 (22.3) | 442/1991 (22.2) | 858/3856 (22.3) |
| Cardiovascular illness | 486/1865 (26.1) | 470/1991 (23.6) | 956/3856 (24.8) |
| Respiratory illness | 175/1865 (9.4) | 226/1991 (11.4) | 401/3856 (10.4) |
| Complications of medical or surgical care | 12/1865 (0.6) | 7/1991 (0.4) | 19/3856 (0.5) |
| Other | 349/1865 (18.7) | 343/1991 (17.2) | 692/3856 (17.9) |
A total of 3875 death certificates were received (1877 for participants in the low-dose CT group and 1998 for those in the radiography group), but the cause of death was unknown for 12 participants in the low-dose CT group and 7 in the radiography group. The denominators represent only the deaths for which the cause was known. Causes of death were categorized according to the following codes in the International Classification of Diseases, 10th Revision (ICD-10): neoplasms of bronchus and lung, C33-C34; neoplasms other than bronchus and lung, C00-D48 (excluding C33 and C34); cardiovascular illness, I00-I99; respiratory illness, J00-J99; complications of medical or surgical care, S00-T17.8, T18-T99, and Y40-Y84; unknown, R96-R99 and death certificates without a coded cause of death; and other, all remaining codes.
The number of deaths from neoplasm of the bronchus and lung in this table is not equal to the number of lung-cancer deaths in the lung-cancer mortality analysis. The lung-cancer deaths included here are those that were determined from information on the death certificate only (without review by the end-point verification team) and include deaths that occurred through December 31, 2009.