Department of Ophthalmology, Örebro University Hospital, Örebro, Sweden2School of Health and Medical Sciences, Örebro University, Örebro, Sweden3Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
Smoking is a risk factor for cataract development, but the effect of smoking cessation on the risk of cataract is uncertain.
To examine the association between smoking cessation and the risk of cataract extraction.
A total of 44,371 men, participating in the Cohort of Swedish Men, aged 45 to 79 years, who in 1997 completed a self-administered questionnaire on smoking habits and lifestyle factors. The men were followed up from January 1, 1998, through December 31, 2009. The cohort was matched with the Swedish National Day-Surgery Register and local registers of cataract extraction in the study area.
Incident cases of age-related cataract extraction.
During 12 years of follow-up, we identified 5713 incident cases of age-related cataract extraction. Smoking intensity and cumulative dose of smoking were associated with an increased risk of cataract extraction (P for trend