Even 5 years after they quit, former smokers still have an increased risk of hip fracture.
The finding is based on Norwegian researchers' 3-year study of 35767 men and women aged 50 years or older. Overall, 421 hip fractures occurred during the study period. But after controlling for body mass index and physical inactivity, the researchers found that, among study participants younger than 75 years, the risk of hip fracture in men who were ex-smokers for at least 5 years was still more than four times that of men who had never smoked. For women in the same age group, former smokers had about a 30% increased risk over those who never smoked. The highest risk was in current smokers: a five-fold increase for men, and nearly a two-fold increase for women.
Voelker R. Smoking and Hip Fractures. JAMA. 1998;280(18):1559. doi:10.1001/jama.280.18.1559-JWM80008-4-1