Subject BMI Smoking history A 23.2 Non-smoker B 19.8 Non-smoker C 19.5 Non-smoker D 19.7 Non-smoker E 21.5 Non-smoker F 22.8 Non-smoker G 20 Non-smoker H 24.9 Non-smoker I 18.2 Non-smoker J 21.8 Non-smoker K 18.7 Non-smoker L 21.4 Non-smoker M 21.4 Non-smoker N 18.2 Non-smoker O 18.5 Non-smoker P 19.8 Non-smoker Q 20.5 Non-smoker mean 21 - SD 1.9 - Comments 2 Did authors estimate sample size?
However, I would like to make a few comments.