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Table 3 Relative validity of the NMDIP, domain specific and generic measurement instruments compared, using subgroups of extent of limitations (n = 702)

From: Stability and relative validity of the Neuromuscular Disease Impact Profile (NMDIP)

 

Group A (n = 110)

low extent of limitation

Group B (n = 250)

moderate extent of limitation

Group C (n = 270)

high extent of limitations

Group D (n = 58)

very high extent of limitations

Kruskal-Wallis H

 

Group

A-Ba

Group

B-Ca

Group

C-Da

Group

A-Da

 

n

Median

(IQR)

n

Median

(IQR)

n

Median

(IQR)

n

Median

(IQR)

Chi Square

RVb

es

es

es

es

NMDIP

 Muscle Functions

97

2 (2)

231

3 (2)

263

4 (2)

56

6 (3)

221.3

88

0.44

0.30

0.44

0.78

 Movement Functions

92

0 (1)

210

2 (2)

232

3 (2)

49

5 (4)

149.3

59

0.34

0.30

0.29

0.72

 Excretion and Reproductive Functions

82

0 (1)

182

1 (2)

194

2 (3)

43

3 (3)

47.1

19

0.16

0.18

-

0.51

 Swallowing and Speech Function

107

0 (0)

238

0 (1)

258

0 (1)

55

1 (2)

48.6

19

0.17

0.11

0.18

0.50

 Mental Functions and Pain

95

2 (2)

205

4 (3)

237

5 (4)

50

6.5 (5)

128.0

51

0.30

0.29

0.21

0.64

 Activities of Moving around

110

0 (2)

250

3 (4)

272

6 (7)

58

13 (9)

251.0

99

0.42

0.39

0.39

0.79

 Self-care and Domestic Activities

109

0 (1)

250

2 (3)

272

4 (8)

58

16.5 (14)

219.7

87

0.36

0.35

0.37

0.81

 Participation in Life Situations

108

0 (0)

249

0 (1)

271

2 (4)

55

4 (4)

168.5

67

0.24

0.33

0.30

0.76

SF-36

 Physical Functioning

109

27 (6)

250

21 (8)

272

16 (7)

58

11 (3)

252.9

100

0.41

0.38

0.43

0.78

 Mental Health

110

25 (3)

250

25 (5)

271

24 (6)

58

21.5 (7)

35.2

14

-

0.12

0.14

0.40

 Social Functioning

110

10 (1)

250

8 (2)

271

7 (3)

58

5.5 (4)

129.8

51

0.31

0.26

0.22

0.62

WHOQOL-bref

 Physical Health and Autonomy

108

3 (1)

244

3 (0)

271

3 (0)

57

3 (1)

68.0

27

0.21

0.19

-

0.47

 Psychological Health

106

4 (0)

246

3.5 (0.5)

271

3.5 (1)

57

3 (0)

68.0

27

0.19

0.14

0.25

0.55

 Social Relations

104

4 (1)

238

4 (0)

261

4 (1)

55

4 (1)

30.8

12

-

0.14

-

0.35

GARS

 Activities of Daily Living

110

11 (1)

250

13 (6)

272

17 (10)

58

27 (17)

213.5

84

0.31

0.35

0.39

0.79

 Instrumental Activities of Daily Living

109

7 (2)

250

10 (7)

270

15 (9)

58

24 (5)

215.0

85

0.33

0.35

0.39

0.78

IPAQ

 Autonomy Indoors

110

7 (3)

250

13 (6)

272

14 (6)

57

19 (11)

174.3

69

0.37

0.27

0.32

0.75

 Family Role

110

8.5 (7)

248

15 (7)

271

18 (7)

58

22 (9)

177.3

70

0.40

0.28

0.22

0.71

 Autonomy Outdoors

110

5.5 (4)

249

9 (3)

272

11 (5)

56

14 (4)

238.5

94

0.39

0.40

0.31

0.76

 Social Relations

110

9 (6)

250

12 (4)

272

13 (5)

56

13 (4)

87.0

34

0.24

0.23

-

0.52

  1. nmdip, gars, and ipaq: higher scores = more unable to perform activity; sf-36 and WHOQOL-bref scales: higher scores = better quality of life and more able to perform activity. Interquartile range (IQR) = Q3-Q1. - = not statistically significant. Bonferroni correctiona = 0.0125 (p-value 0.05/4). RV = relative validity,b = score indicating the relative validity with score 100 related to the highest H-statistic. ES = effect size