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Table 2 Bivariate correlations of symptom improvement variables in the double-blind condition

From: Patients’ experiences treated with open-label placebo versus double-blind placebo: a mixed methods qualitative study

Symptom improvement

IBS-SSS

Interview

Yes/Noa

Degreeb

Yes/Noc

Degreed

IBS-SSS

Yes/Noa

Spearman’s rho

1

.658

.782

.580

p value

 

.011

.001

.030

Degreeb

Spearman’s rho

.658

1

.772

.695

p value

.011

 

.001

.006

Interview

Yes/Noc

Spearman’s rho

.782

.772

1

742

p value

.001

.001

 

.002

Degreed

Spearman’s rho

.580

.695

742

1

p value

.030

.006

.002

 
  1. Sample size n = 14
  2. IBS-SSS = irritable bowel severity scoring system
  3. a“Yes” is specified as at least 50 points of improvement on the IBS-SSS
  4. bDegree is specified as no (< 50 points improvement on the IBS-SSS), mild (≥ 50 points improvement), moderate (≥ 100 points improvement) or high (≥ 150 points improvement) improvement
  5. c“Yes” is specified as report of any symptom improvement in the interview
  6. dDegree is specified as report of no, mild, moderate or high improvement in the interview