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Table 7 Relation between measurement error and minimal important change values of each instrument

From: Responsiveness and interpretability of commonly used outcome assessments of mobility capacity in older hospital patients with cognitive spectrum disorders

Instrument

Measurement error (MDC90)a

MIC value

MDC90 < MIC

de Morton Mobility Index, 0–100 points

5.3

8.5

Yes

Hierarchical Assessment of Balance and Mobility, 0–26 points

2.5

2.0

No

Performance Oriented Mobility Assessment, 0–28 points

2.6

2.5

No

Short Physical Performance Battery, 0–12 points

1.5

0.5

No

4-m gait speed test, m/sec

0.21

0.11

No

5 × chair rise test, sec

5.8

2.0–4.0

No

2-min walk test, m

18.5

12.5

No

Timed Up and Go test, sec

7.4

NA

NA

Barthel Index mobility subscale, 0–40 points

5.1

3.5

No

Functional Ambulation Categories, 0–5 points

NA

0.5

NA

  1. MDC90 minimal detectable change with 90% confidence, MIC minimal important change, NA not applicable
  2. aMDC values are taken from Braun et al. 2019 [36] and are based on the same cohort