Smoking 21 or more pack-years associated with tooth loss (adjusted RR = 1.78, CI = 1.36–2.33). Similarly, 31 or more years of smoking associated with the outcome (adjusted RR = 1.72, CI = 1.20 ...
Former smokers' includes those who had smoked daily for at least one year, but had quit smoking ... teeth. Excluding third molars, we formed the number of missing teeth variable to measure tooth ...