There appears to be an association between reduced lung function and the risk of lung cancer, Canadian researchers report.Dr. D. D. Sin told Reuters Health, “Even relatively small reductions in lung function, which are considered within the normal range, increased the risk of lung cancer by 30 percent to 60 percent, especially among women.” Sin and colleagues from the University of British Columbia, Vancouver, reviewed existing studies that have looked into the relationship between lung function and the risk of lung cancer. The analysis involved 204,990 subjects, of whom 6185 had died from lung cancer.As lung function decreased, the risk of lung cancer increased, the team reports in the issue of Thorax.