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Table 3 Correlation coefficientsa for the EPIC domain summary scores with validation instruments at baseline and follow-up (n = 92b)

From: The German version of the Expanded Prostate Cancer Index Composite (EPIC): translation, validation and minimal important difference estimation

 

Baseline

6 weeks follow-up

EPIC domain summary scores

EPIC domain summary scores

Urinary

Bowel

Sexual

Hormonal

Urinary

Bowel

Sexual

Hormonal

EORTC PR-25

 Urinary symptoms

−0.70

   

−0.79

   

 Bowel symptoms

 

−0.42

   

−0.64

  

 Hormonal treatment

   

−0.58

   

−0.70

 Sexual activity

  

0.68

   

0.14

 

 Sexual functioning

  

0.66

   

0.25

 

Feeling Thermometerb

0.12

0.18

0.06

0.37

0.37

0.28

0.27

0.50

SF-36

 Physical Functioning

0.40

   

0.47

   

 Social Functioning

0.14

0.13

  

0.49

0.19

  

 Bodily Pain

 

0.22

   

0.56

  

 Role Emotional

  

0.08

0.61

  

0.36

0.62

 General Health

   

0.47

   

0.59

 Vitality

   

0.60

   

0.72

  1. Abbreviations: EPIC Expanded Prostate Cancer Index Composite, EORTC PR25 European Organization for the Research and Treatment of Cancer Quality of Life Questionnaire–Prostate 25; Hormonal treatment = Hormonal treatment-related symptoms
  2. aCorrelation coefficients according to distribution: Spearman’s rank correlation coefficients for not-normally distributed scores at baseline and 6 weeks follow-up. Correlation coefficients are boldface font when they met our assumptions and normal font when they were higher or lower than expected
  3. bMissing values: Correlations between EPIC and EORTC PR-25 domains: 3 to 13, except for EPIC sexual and EORTC PR25 sexual functioning domains (baseline = 23/follow-up = 57); Correlations between EPIC domains and Feeling Thermometer: baseline = 24–25/follow-up = 9–10; Correlations between EPIC and SF-36 domains: all time points = 0–2