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

Table 5 **Participant characteristics by drop-out time* among those who dropped out of the crossover tea study**

Characteristic	Early drop-out	Late drop-out
	(N = 18)	(N = 15)
	(%)	(%)
Age, mean (SD)	34 (12)	32 (12)
Male	39	47
Race/Ethnicity ^c
White	33	60
African-American	45	27
Other	22	13
Smoking status
Current	67	60
Former	-	-
Never	33	40
Regular alcohol intake	33	7
Regular tea intake^{, c}	22	47
Regular coffee intake^{, c}	33	50
Regular carbonated beverages intake	50	47
Fruit/vegetable servings/day, mean (SD)	2.8 (1.7)	2.7 (1.7)
BMI, mean (SD)	24.1 (7.1)	24.33 (3.9)

^a P value <0.05 for comparison between “early drop-out” and “late drop-out”.
^b 0.05 ≤ P value < 0.10 for comparison between “early drop-out” and “late drop-out”.
^c 0.10 ≤ P value < 0.15 for comparison between “early drop-out” and “late drop-out”.
* Drop-out time categorized as “early” for those who dropped out between the first and second treatment visits, and “late” for those who dropped out after the second treatment visit.
Regular intake <2 servings per day. Participants reporting ≥2 servings per day consumption of tea, coffee, carbonated beverages, or alcohol were excluded from the trial.

ISSN: 2662-7671