Table 4

Treatment completion* among current cigarette smokers and non-smokers in the crossover tea 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)

aP value <0.05 for difference in proportions between smokers and non-smokers.

b 0.05 ≤ P value < 0.10 for difference in proportions between smokers and non-smokers.

c 0.10 ≤ P value < 0.15 for difference in proportions between smokers and non-smokers.

* Treatment completion is defined as completion of all four crossover treatments.

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.

Dash et al.

Dash et al. BMC Complementary and Alternative Medicine 2012 12:96   doi:10.1186/1472-6882-12-96

Open Data