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Table 2 Observed distribution of the participants and information on the distribution of outcome by smoking

From: Association between smoking intensity and duration and tooth loss among Finnish middle-aged adults: The Northern Finland Birth Cohort 1966 Project

  Participants Number of missing teeth
% Mean ≥ 1: %
0–10 pack-years 4 1.6 60
11–20 pack-years 5 2.1 69
21 or more pack-years 6 2.4 67
Former smoker 26 1.4 55
Occasional smoker 8 1.2 54
Never smoker 51 1.1 48
1–20 years of smoking 4 1.8 62
21–30 years of smoking 8 2.2 68
31 or more years of smoking 3 2.4 66
Total (n = 1735) 100 1.4 53