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Table 1 Study design

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

STUDY DAY

1

2

3

4

5

LAB VISIT

1

2

  

3

Lab smoking – tobacco cigarette

X

    

Lab smoking – ENDS

 

X

  

X

Field smoking – tobacco cigarette

X

    

Field smoking – ENDS

 

X

X

X

 

Breath

X

X

  

X

Saliva

X

   

X

Urine

X

   

X

Questionnaires

X

X

  

X

QSU (pre and post product use)

X

X

  

X

CES (post product use only)

X

X

  

X