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Table 3 Convergent and discriminative validity and reliability scale of each component items

From: Development and validation of a screening tool for SPondyloArthritis Screening in Sub-Saharan Africa: SpASSS questionnaire

Component

Number of items

mean ± SD

Α

Convergent validity

Discriminative validity

C1

8

0.98 ± 1.73

0.830

0.883

0.895

C2

3

0.76 ± 0.97

0.708

0.833

0.881

C3

3

0.39 ± 0.49

0.109

0.234

0.349

C4

2

0.19 ± 0.41

0.097

0.106

0.132

C5

2

0.18 ± 0.51

0.037

0.101

0.123

C6

2

0.15 ± 0.42

0.011

0.112

0.125

  1. αCronbach’s alpha coefficient
  2. mean ± SD value of reliability scale of each component items