From: The de Morton Mobility Index (DEMMI): An essential health index for an ageing world
Clinimetric property | Development study 17 items | Validation study 15 items |
---|---|---|
Reliability, MDC 90 (95%CI) | ||
Inter rater | 9.5 (5.0 to 13.3), n = 21 | 8.90 (6.3 to 12.7), n = 35 |
MCID (95%CI) | ||
Criterion based method | 7.8 (5.3 to 10.2) | 9.43 (5.9 to 12.9) |
Distribution based method | 8.0 | 10.5 |
Construct Validity (r, 95%CI) | ||
Convergent | ||
HABAM | 0.92 (0.88 to 0.95), p = 0.00 | 0.91 (0.87 to 0.94), p = 0.00 |
Barthel Index | 0.76 (0.65 to 0.84), p = 0.00 | 0.68 (0.56 to 0.77), p = 0.00 |
Discriminant | ||
MMSE | 0.36 (0.16 to 0.53), p = 0.00 | 0.24 (0.05 to 0.41), p = 0.02 |
APACHE 11 | -0.11 (-0.32 to 0.11), p = 0.18 | 0.07 (-0.12 to 0.26), p = 0.49 |
Charlson | -0.19 (-0.39 to 0.03), p = 0.11 | -0.04 (-0.23 to 0.15), p = 0.68 |
Known Groups (DEMMI, 95%CI) | ||
discharge to rehabilitation | 37.54 (33.99 to 45.10), n = 11 | 50.75 (42.39 to 59.11)n = 8 |
discharge to home | 59.61 (56.32 to 62.90), n = 62 Independent t test: p = 0.00 | 62.14 (57.80 to 66.49) n = 70 Independent t test: p = 0.03 |
Responsiveness to change # | ||
Effect Size Index # | ||
DEMMI | 0.37 (0.28 to 0.46) | 0.39 (0.28 to 0.50)* |
HABAM | 0.31 (0.20 to 0.43) | 0.35 (0.23 to 0.47) |
Barthel Index | 0.30 (0.17 to 0.44) | 0.13 (0.01 to 0.25)* |
GRI (patient) # | ||
DEMMI | 1.23 (0.90 to 1.56) | 0.92 (0.66 to 1.17)* |
HABAM | 1.00 (0.46 to 1.55) | 0.72 (0.49 to 0.94) |
Barthel Index | 0.48 (0.01 to 0.95) | 0.43 (0.21 to 0.65)* |
GRI (therapist) # | ||
DEMMI | 2.06 (1.60 to 2.51) | 1.73 (1.37 to 2.09)* |
HABAM | 2.62 (1.70 to 3.54) | 1.17 (0.86 to 1.48) |
Barthel Index | 1.58 (0.56 to 2.60) | 0.65 (0.37 to 0.93)* |
Floor effect | 0% | <1% |
Ceiling effect | <1% | 3.8% |
Time to administer, mean (sd) | 13 mins 42 seconds (4.99 mins) for 42 mobility items | 8 mins 47 seconds (3.89 minutes) for 17 mobility items |