Table 1

Frequency distributions of selected variables in lung cancer case patients and control subjects

VariablePatients caseControl subjectsPa
No.(%)No.(%)
Age (yr)0.979
 ≤5063(19.7)63(18.5)
 51–6094(29.5)102(30.0)
 61–70119(37.3)127(37.4)
 >7043(13.5)48(14.1)
Sex0.504
 Male170(53.3)190(55.9)
 Female149(46.7)150(44.1)
Smoking status0.150
 Current smoker148(46.4)133(39.1)
 Former smoker138(43.3)171(50.3)
 Never smoker33(10.3)36(10.6)
Pack-years smoked0.002
 >38200(62.7)173(50.9)
 ≤38119(37.3)167(49.1)
Family history of any cancer0.004
 Yes224(70.2)202(59.4)
 No95(29.8)138(40.6)
  • a Two-sided χ2 test.