Skip to main content

Table 2 Domain-specific summary and subscale scores of the German version of the EPIC at baseline and 6 weeks follow-up and results on internal consistency and reproducibilitya

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

EPIC domains

No. of items

Cronbach’s alpha reliability coefficienta(n = 92)

Test-retest reliability (ICC, 95% CI) (n = 44)

Domain Summary Scores

 Urinary

12

0.87

0.79 (0.65–0.88)

 Bowelb

14

0.80

0.79 (0.64–0.88)

 Sexualb

13

0.92

0.87 (0.77–0.93)

 Hormonal

11

0.81

0.69 (0.50–0.82)

Urinary subscales

 Function

5

0.64

0.43 (0.16–0.65)

 Bother

7

0.85

0.81 (0.68–0.89)

 Incontinence

4

0.82

0.54 (0.30–0.72)

 Irritation/obstruction

7

0.81

0.82 (0.69–0.90)

Bowel subscales

 Functionb

7

0.51

0.78 (0.63–0.88)

 Bother

7

0.81

0.77 (0.62–0.87)

Sexual subscales

 Function b

9

0.92

0.92 (0.87–0.96)

 Botherb

4

0.85

0.68 (0.47–0.81)

Hormonal subscales

 Function

5

0.58

0.61 (0.38–0.76)

 Bother

6

0.69

0.65 (0.43–0.79)

  1. Abbreviations: EPIC Expanded Prostate Cancer Index Composite, ICC intraclass correlation coefficient
  2. aCronbach’s alpha calculated using baseline scores
  3. bMissing values: Bowel summary: 1, Sexual summary: 1, Bowel function: 2, Sexual function: 5, Sexual bother: 1