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Table 4 Acceptability of treatment (chocolate or capsules)

From: Dark chocolate or tomato extract for prehypertension: a randomised controlled trial

  Dark chocolate groups: Capsule groups: Mean (SD) P-valuea
  70% cocoa, 50 g daily tomato extract (15 mg lycopene) or placebo, 1 capsule daily   
Ease of taking supplements b 50% found it hard to eat 50 g dark chocolate daily for 8 weeks 100% found it easy to take one capsule daily for 8 weeks Chocolate groups: 2.4 (1.3)  
    Capsule groups: 1.3 (0.5) p < 0.0001
Acceptability c 20% found it unacceptable 100% acceptable Chocolate groups: 1.9 (1.0)  
    Capsule groups: 1.3 (0.5) p < 0.0001
Reason for unacceptability Unpalatable, too rich, encountered side-effects, such as constipation and headache N/A   
Withdrawals unpalatable (n = 2) gastrointestinal upset (n = 1); illness unrelated to study (n = 1)   
Willingness to continue with treatment after trial d 73% would continue with daily dark chocolate; 100% would continue with capsules;   
  Average dark chocolate consumption increased after the trial compared to baseline: mean increase = 44 ± 194 g/week 80% intended adding more tomatoes to diet;   
   35% would rather eat tomatoes than take a capsule   
Willingness to pay for supplements d 73% would be willing to spend ~A$1.25 for 50 g dark chocolate per day 66% would be willing to spend ~A$1 per capsule per day   
  1. aP-values are calculated by student t-test,
  2. b Ease was assessed using a 5-point Likert scale with 1 = very easy, 2 = easy, 3 = sometimes easy, sometimes hard, 4 = hard, 5 = very hard;
  3. c Acceptability was assessed using a 4 = point Likert scale with 1 = very acceptable, 2 = acceptable, 3 = unacceptable, 4 = very unacceptable
  4. dWillingness for long-term treatment was estimated by bivariate questions (yes/no)