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Table 1 Characteristics of ecigarette users, and usage patterns

From: Electronic cigarettes: a survey of users

Characteristic  
Number of respondents 81
Age, median (range), years 37 (19-65)
Men (%) 77
Smoking status (%)  
   Former smokers 63
   Daily smokers 23
   Occasional (non-daily) smokers 13
Cigarettes per day, in smokers (median) 12
Days of abstinence, in former smokers, median (25th and 75th percentiles) 100 (30, 210)
Use of electronic cigarettes  
Days of use of the e-cigarette, median (25th and 75th percentiles) 100 (30, 210)
Number of puffs per day, median (25th and 75th percentiles) 175 (90, 275)
Number of puffs per day, range 10 to 600
Price per package, median, Euros (U.S. dollars) 40 (60)
Median dose of nicotine per unit, mg (25th and 75th percentiles) 14 (10, 16)
Does (did) the e-cigarette help you quit smoking? (%)  
   Yes, a lot 79
   Yes, somewhat 16
   No, not at all 5