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Table 4 Treatment completion* among current cigarette smokers and non-smokers in the crossover tea study

From: A six-month crossover chemoprevention clinical trial of tea in smokers and non-smokers: methodological issues in a feasibility study

 

Smokers

Non-smokers

 

Total

Completed

Dropped out

Total

Completed

Dropped out

 

(n)

n (%)

n (%)

(n)

n (%)

n (%)

Treatment number

      

1b

32

20 (62)

12 (38)

33

27 (82)

6 (18)

2

20

16 (80)

4 (20)

27

24 (89)

3 (11)

3

16

13 (81)

3 (19)

24

22 (92)

2 (8)

4

13

11 (85)

2 (15)

22

21 (95)

1 (5)

Treatment type

      

Green tea

18

13 (72)

5 (28)

27

24 (89)

3 (11)

Black teaa

22

14 (63)

8 (37)

24

23 (96)

1 (4)

Caffeinated water

20

17 (85)

3 (15)

28

24 (86)

4 (14)

Placebo

21

16 (77)

5 (23)

27

21 (85)

6 (15)

  1. a P value <0.05 for difference in proportions between smokers and non-smokers.
  2. b 0.05 ≤ P value < 0.10 for difference in proportions between smokers and non-smokers.
  3. c 0.10 ≤ P value < 0.15 for difference in proportions between smokers and non-smokers.
  4. * Treatment completion is defined as completion of all four crossover treatments.
  5. Treatment number represents the number of the assigned crossover treatment. For e.g., treatment number 1 is the first assigned treatment after the run-in period.