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Table 3 Conducted initial validation assessments according to described aims of instruments1)

From: A comprehensive systematic review of the development process of 104 patient-reported outcomes (PROs) for physical activity in chronically ill and elderly people

Described aim of instrument Test-retest Internal consistency Validity Responsiveness MID 2)
  n % 3) n % 3) n % 3) n % 3) n % 3)
Evaluative (n = 33) 23 69.7% 21 63.6% 32 96.9% 13 39.4% 2 6.1%
Discriminative (n = 26) 15 57.7% 18 69.2% 24 92.3% 6 23.1% 1 3.8%
Planning (n = 13) 11 84.6% 7 53.8% 12 92.3% 3 23.1% 1 7.7%
Predictive (n = 5) 1 20.0% 0 0% 3 60.0% 0 0% 0 0%
  1. 1) For data extraction details, please see Additional file 1
  2. 2) MID = Minimal important difference
  3. 3) % in relation to the corresponding aim