Demographic, tumour and treatment characteristics of patients with lung cancer in California by stage of diagnosis, 1988–2009
| Characteristics (mean±SD or %) | Localised only (n=59 609) | Regional (n=73 513) | Distant site(s) (n=186 496) | Unknown* (n=32 435) | Total (n=352 053) |
|---|---|---|---|---|---|
| Age (years) | 69.9±10.5 | 68.8±10.5 | 68.7±11.3 | 72.5±10.7 | 69.3±11.0 |
| % Male | 49.8 | 54.7 | 56.1 | 54.8 | 54.6 |
| Race/ethnicity, % | |||||
| Non-Hispanic white | 81.0 | 78.7 | 75.0 | 79.2 | 77.2 |
| Hispanic | 6.5 | 7.1 | 8.8 | 7.4 | 7.9 |
| Non-Hispanic black | 6.2 | 7.2 | 7.9 | 6.9 | 7.4 |
| Other/unknown | 6.2 | 7.0 | 8.3 | 6.5 | 7.5 |
| Marital status, % | |||||
| Single | 9.4 | 9.6 | 11.9 | 9.6 | 10.8 |
| Married | 56.2 | 57.1 | 53.7 | 47.9 | 54.3 |
| Formerly married | 32.5 | 31.5 | 32.1 | 37.6 | 32.6 |
| Unknown | 1.8 | 1.8 | 2.3 | 4.9 | 2.4 |
| Education index†, % | |||||
| Low | 22.3 | 23.6 | 25.6 | 29.6 | 25.0 |
| Low–medium | 24.5 | 25.0 | 24.8 | 27.4 | 25.0 |
| Medium–high | 25.4 | 25.4 | 24.9 | 24.2 | 25.0 |
| High | 27.9 | 26.1 | 24.7 | 18.8 | 25.0 |
| Rural–urban commuting area (RUCA), % | |||||
| Non-metropolitan core | 13.8 | 14.1 | 13.8 | 18.7 | 14.3 |
| Metropolitan core | 86.2 | 85.9 | 86.2 | 81.3 | 85.7 |
| Unknown | <0.1 | <0.1 | <0.1 | <0.1 | <0.1 |
| Socioeconomic status (SES), % | |||||
| Lowest | 14.0 | 15.0 | 16.6 | 18.8 | 16.1 |
| Lower-middle | 20.3 | 20.7 | 20.9 | 23.6 | 21.0 |
| Middle | 21.6 | 22.1 | 22.0 | 22.2 | 22.0 |
| Higher-middle | 21.8 | 21.3 | 20.8 | 19.8 | 21.0 |
| Highest | 21.1 | 19.6 | 18.2 | 15.2 | 18.7 |
| Unknown | 1.3 | 1.3 | 1.4 | 0.5 | 1.3 |
| Year of diagnosis, % | |||||
| 1988–1992 | 22.2 | 22.4 | 19.8 | 38.8 | 22.5 |
| 1993–1997 | 23.1 | 22.3 | 21.6 | 29.0 | 22.7 |
| 1998–2002 | 23.0 | 22.9 | 23.9 | 18.7 | 23.0 |
| 2003–2009‡ | 31.7 | 32.4 | 34.7 | 13.6 | 31.8 |
| Histology at diagnosis, % | |||||
| Squamous cell | 26.1 | 27.2 | 15.2 | 22.3 | 20.2 |
| Adenocarcinoma | 45.0 | 35.4 | 35.4 | 23.1 | 35.9 |
| Small cell | 5.7 | 13.2 | 18.1 | 13.8 | 14.6 |
| Large cell | 12.1 | 14.3 | 20.8 | 35.7 | 19.3 |
| Other | 11.2 | 9.9 | 10.5 | 5.2 | 10.0 |
| Treatment types | |||||
| Surgery, % | |||||
| No | 32.5 | 59.6 | 94.6 | 92.8 | 76.6 |
| Yes | 67.4 | 40.3 | 5.2 | 4.5 | 23.0 |
| Unknown | 0.1 | 0.1 | 0.2 | 2.7 | 0.4 |
| Radiation, % | |||||
| No | 81.3 | 52.1 | 56.7 | 72.8 | 61.4 |
| Yes | 18.7 | 47.9 | 43.3 | 26.8 | 38.6 |
| Unknown | <0.1 | <0.1 | <0.1 | 0.5 | 0.1 |
| Chemotherapy, % | |||||
| No | 87.0 | 59.2 | 55.1 | 76.2 | 63.3 |
| Yes | 11.3 | 38.0 | 41.2 | 19.8 | 33.5 |
| Unknown | 1.6 | 2.8 | 3.7 | 4.0 | 3.2 |
| Geocode match quality, % | |||||
| Street address match | 91.5 | 91.5 | 91.5 | 89.1 | 91.3 |
| Area-level match | 8.5 | 8.5 | 8.5 | 10.8 | 8.7 |
| Other or missing | <0.1 | <0.1 | <0.1 | <0.1 | <0.1 |
| Median survival time (years) | 3.6 | 1.3 | 0.4 | 0.7 | 0.7 |
| Median survival time (years), by histology at diagnosis | |||||
| Squamous cell | 2.6 | 1.1 | 0.4 | 0.7 | 0.8 |
| Adenocarcinoma | 5.1 | 1.9 | 0.4 | 0.8 | 0.9 |
| Small cell | 1.5 | 1.0 | 0.4 | 0.8 | 0.6 |
| Large cell | 1.6 | 0.8 | 0.2 | 0.6 | 0.4 |
| Other | 6.1 | 1.3 | 0.4 | 1.0 | 0.8 |
*Insufficient evidence available to assign a stage (eg, patient dies before workup is complete, patient refuses diagnostic procedure or limited workup is performed due to patient's age or simultaneous contraindicating condition).
†Categorised by quartiles.
‡Most recent year of diagnosis category includes 7 years, while the other categories each include 5 years.