TABLE 1.
Clinical and Pathologic Characteristics of the Study Group and Control Group*
| Characteristic | Study Group | Control Group | P Value |
|---|---|---|---|
| (N=21) | (N=33) | ||
| Sex - no. (%) | 1.00 | ||
| Male | 10(48) | 15(45) | |
| Female | 11(52) | 18(55) | |
| Age - yr | 0.05 | ||
| Mean | |||
| Median (range) | 60(42-75) | 65(39-84) | |
| Histology - no. (%) | 0.57 | ||
| Adenocarcinoma | 12(57) | 22(67) | |
| Squamous cell carcinoma | 9(43) | 11(33) | |
| Primary location - no. (%) | 1.00 | ||
| Right lung | 12(57) | 18(55) | |
| Left lung | 9(43) | 15(45) | |
| Tumor size - cm | 0.63 | ||
| Median (range) | 2.2(0.3-9.5) | 2.6(0.6-7.3) | |
| Tumor stage - no. (%) | 0.45 | ||
| T1 | 13(62) | 18(55) | |
| T2 | 5(24) | 13(39) | |
| T3 | 2(10) | 2(6) | |
| T4 | 1(5) | 0(0) | |
| Node stage - no. (%) | 0.54 | ||
| N0 | 14(67) | 25(76) | |
| N1 | 7(33) | 8(24) | |
| Pathologic pTNM stage - no. (%)† | 0.19 | ||
| I | 12(57) | 23(70) | |
| II | 7(33) | 10(30) | |
| III | 2(10) | 0(0) |
*
Because of rounding, not all percentages total 100.
†
pTNM denotes pathologic tumor-node-metastasis stage.