Scientists say a major strength of this study was detailed smoking information which they received from the almost 1,000 study participants. they say this is important because of the role of smoking in lung cancer and because smokers generally have lower estrogen levels than non-smokers.
Low estrogen may indicate lung cancer risk
July 24, 2009 Researchers reporting in the International Journal of Cancer say it's possible that vulnerability to lung cancer is caused by early and sudden decrease in estrogen levels or potentially long-term use of hormone replacement therapy.
