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Table 2 Participant characteristics by treatment completion* 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

Characteristic Completed (N = 32) Dropped out (N = 33)
  (%) (%)
Age, mean (SD) 33 (12) 33 (12)
Male 44 42
Race/Ethnicity   
 White 44 46
 African-American 9 36
 Hispanic 6 6
 Asian 38 6
 Other 3 6
Smoking statusa   
 Current 34 64
 Former 6 -
 Never 60 36
Regular alcohol intake 25 21
Regular tea intake 41 33
Regular coffee intake 52 41
Regular carbonated beverages intake 32 49
Fruit/vegetable servings/day, mean (SD) 2.4 (1.3) 2.7 (1.7)
BMI, mean (SD) 24.1 (3.6) 24.2 (5.8)
  1. a P value <0.05 for comparison between “completed” and “dropped out”.
  2. b 0.05 ≤ P value < 0.10 for comparison between “completed” and “dropped out”.
  3. c 0.10 ≤ P value < 0.15 for comparison between “completed” and “dropped out”.
  4. * Treatment completion is defined as completion of all four crossover treatments.
  5. 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.