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Table 3 Smoking topography mean values for cigarettes and ENDS at the laboratory session

From: Initial puffing behaviors and subjective responses differ between an electronic nicotine delivery system and traditional cigarettes

  Cigarette ENDS ANOVA
  Mean SE Mean SE F (1,17) p
Puff count (n) 13.2 1.1 8.7 1.6 7.35 0.015
Per-puff volume (ml) 67.5 6.3 118.2 13.3 10.22 0.005
Puff velocity (ml/sec) 36.1 1.8 52.0 4.7 8.00 0.012
Peak velocity (ml/sec) 56.3 4.2 73.4 6.6 4.50 0.049
Duration (sec) 3.0 1.0 3.0 0.8 0.003 0.960
Inter-puff interval (sec) 21.3 6.2 29.6 11.7 0.36 0.555
Total volume (ml) 829.0 51.4 1120.7 320.8 0.84 0.373