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Table 2 Daily smoking habits, habit duration in years, FTND, and mean values

From: Berlin's medical students' smoking habits, knowledge about smoking and attitudes toward smoking cessation counseling

Variable (%)
Daily number of cigarettes (cigarettes/day)  
   1-10 78.5
   11-20 12.3
   21-30 9.2
Smoking duration (years)  
   1-5 13.3
   6-10 41.7
   11-15 33.3
   > 16 11.7
FTND†  
   Light smoker 90.8
   Moderate smoker 3.1
   Heavy smoker 6.1
Mean values (SD)  
   Age at first tobacco use‡ 16.7 (2.98)
   Years of smoking* 10.4 (4.36)
  1. † Fagerström Test for Nicotine Dependence (FTND); ‡ based on current and previous smoke-rs (N = 108); * Based on current smokers (N = 60)