Table 1.

Mean cotinine values and percentile groupings by smoking status

Current smokersCurrent smokers who smoked in the last 24 h
n6,4236,085
Mean (SD)289.15 (174.43)302.08 (168.78)
Percentiles
    10th59.0285.36
    20th129.50151.30
    30th187.42203.90
    40th236.36248.50
    50th279.50289.70
    60th323.44331.36
    70th371.58380.42
    80th431.52438.18
    90th516.80522.14