Table 6.
Histology in never smokers with non–small cell lung cancer*
| Time period | UTSW |
Parkland |
Vanderbilt |
|||
|---|---|---|---|---|---|---|
| Total No.of never-smoking NSCLC patients | No. of nonsquamous patients (%) | Total No.of never-smoking NSCLC patients | No. of nonsquamous patients (%) | Total No. of never-smoking NSCLC patients | No. of nonsquamous patients (%) | |
| 1990–1995 | 48 | 45 (93.8) | 2 | 2 (100.0) | 2 | 2 (100.0) |
| 1996–2000 | 39 | 38 (97.4) | 38 | 32 (84.2) | 68 | 59 (86.8) |
| 2001–2005 | 52 | 51 (98.1) | 32 | 27 (84.4) | 85 | 78 (91.8) |
| 2006–2010 | 100 | 90 (90.0) | 71 | 64 (90.1) | 141 | 128 (90.8) |
| 2011–2013 | 136 | 129 (94.9) | 62 | 58 (93.6) | 159 | 150 (94.3) |
| P† | .64 | .15 | .11 | |||
*
Absolute numbers and percentages of nonsquamous vs squamous histology in never smokers with non–small cell lung cancer (NSCLC). Of note, the absolute numbers of patients in this table do not necessarily add up to the overall totals of the study (Figure 1) because while all patients counted in the study had smoking status documented, not all patients’ subtype of NSCLC were documented in the registries. NSCLC = non–small cell lung cancer; UTSW = University of Texas Southwestern.
†
Two-sided P value from exact Cochran-Armitage trend test.