TABLE 1

General Characteristics of Patients

VariableData
Age (y)63.03 ± 10.01
Sex (M/F)134 (54.0%)/114 (46.0%)
FEV1 (%)/FVC (%)97.32 ± 26.86/88.81 ± 23.55
Smoking history (pack-years)14.79 ± 25.83
Dissected lymph nodes21.50 ± 9.38
T stage
 ≤2 cm129 (52.0%)
 2–3 cm119 (48.0%)
Postoperative morbidity17 (6.8%)
Postoperative mortality0
Pathologic findings
 Adenocarcinoma197 (79.4%)
 Nonadenocarcinoma51 (20.6%)
Differentiation
 Well differentiated188 (75.8%)
 Moderately differentiated41 (16.5%)
 Poorly differentiated19 (7.7%)
 Lymphovascular invasion24 (9.6%)
  • Qualitative data are expressed as numbers, followed by percentages in parentheses; continuous data are expressed as mean ± SD.

  • FEV1 = forced expiratory volume at end of first second; FVC = forced vital capacity.