A new American Cancer Society study analyzed data on lung cancer occurrence among lifelong non-smokers in North America, Europe, and Asia found that lung cancer death rates among never-smokers are highest among men. The review, the largest to date of lifelong non-smokers, also suggests that the death rates among never-smokers have remained stable over the past several decades. The researchers say the number of never-smokers in developed countries is increasing; a subject of particular interest and importance. The report also found no indication that lung cancer rates have changed among lifelong non-smokers’ in the U.S since the 1930s, failing to support assertions by other researchers that lung cancer risk has increased substantially for lifelong non-smokers.