Table 1.

Smoking topography for regular-yield cigarettes (n = 58)

Puff numberPuff duration (s)Interpuff interval (s)Mean flow rate (mL/s)Puff volume (mL)Total smoke intake (mL)
Trial 1 (SD)11.3 (3.4)1.5 (0.2)33.5 (17.6)38.1 (5.6)54.2 (10.3)612.0 (195.7)
Trial 2 (SD)11.1 (3.3)1.4 (0.3)35.6 (18.4)37.9 (6.1)52.3 (12.4)580.5 (206.9)
Correlation (P level)0.91 (<0.001)0.82 (<0.001)0.96 (<0.001)0.85 (<0.001)0.86 (<0.001)0.87 (<0.001)