Table 1

Characteristics of patients with and without fresh frozen tissue available for study

Fresh tissue (n=185)No fresh tissue (n=175)Total group (n=360)
Agea67 ± 1165 ± 1066 ± 10
Sex
 Female84(45%)85(49%)169 (47%)
 Male101(55%)90(51%)191(53%)
Pack-yearsa56 ± 4056 ± 3656 ± 38
Years smokeda38 ± 1637 ± 1537 ± 15
Years quita7 ± 108 ± 107 ± 10
Smoking status
 Never13 (7%)9 (5%)22(6%)
 Ex-smoker97 (52%)97 (55%)194(54%)
 Current75 (41%)69 (39%)144(40%)
Asbestos exposureb
 No159 (88%)148 (85%)307 (86%)
 Yes22(12%)26(15%)48(14%)
Stageb
 I102(56%)100(58%)202(57%)
 II35(19%)18(11%)53(15%)
 III40(22%)45(26%)85(24%)
 IV5(3%)9(5%)14(4%)
Histologyb
 Adenocarcinoma96(53%)101(57%)195(54%)
 Squamous cell carcinoma56(31%)49(28%)108(30%)
 Other31(17%)25(15%)56(16%)
  • a Mean ± SD.

  • b Asbestos exposure, stage, and histology data are missing for 5, 6, and 2 patients, respectively.