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Table 5 Description of the psychometric characteristics of the final SeMaS

From: Validation of Self-Management Screening (SeMaS), a tool to facilitate personalised counselling and support of patients with chronic diseases

Characteristic

n

PPV

NPV

Crohnbach’s alpha (α) for internal consistency

Correlation of sum score on SeMaS with sum score on original questionnaire

Self-efficacy

182

57.1

79.8

0.86

0.418**a

Coping

171

41.5

94.4

0.70

0.746** (P)

0.73

0.800** (E)

0.56

0.783** (D)

Depression

192

67.9

99.4

0.87

0.805** a

Anxiety

182

77.8

91.3

0.56

0.653** a

Locus of control

147

67.6

53.3

0.02

0.472**

Social support

191

N.A.

N.A.

0.63

0.626**a

Perceived burden of disease

163

N.A.

N.A.

N.A.

0.554**a

  1. PPV percentage of patients with a barrier on SeMaS that has a barrier according to the original questionnaire
  2. NPV percentage of patients with no barrier on SeMaS that has no barrier according to the original questionnaire
  3. N. A. not applicable
  4. Coping styles: (P) problem solving; (E) emotional; (D) distraction
  5. a correlation: spearman’s rho; sum scores were not normally distributed
  6. * p < 0.05; ** p < 0.01