Table 1 Characteristics of female lung cancer cases and controls
From: Reliability and accuracy of interview data in non-smoking female lung cancer case-control study
Variable | Cases | Controls | P value |
|---|---|---|---|
Number | 56 | 56 | Â |
Age(years) | 53.4 ± 10.2 | 52.6 ± 9.6 | 0.52 |
Income(Monthly RMB yuan per person per family in 1995) | 334.9 | 311.5 | 0.03 |
Level of Education | Â | Â | Â |
   None | 13 | 7 |  |
   Primary school | 14 | 21 |  |
   Junior school | 13 | 17 |  |
   Senior school and high | 16 | 11 | 0.20 |