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Table 2 The 30 items and their Rasch measurement properties by location order

From: Psychometric evaluation of the Disabilities of the Arm, Shoulder and Hand (DASH) with Dupuytren’s contracture: validity evidence using Rasch modeling

     

Chi-square

F-stat

 

Items

Location

SE

Fit Residual

Value

p-value

Value

p-value

3.

Turn a key

-1.37

0.18

-1.149

3.953

0.139

2.833

0.062

20.

Manage transportation needs

-1.279

0.166

-0.475

1.932

0.381

0.864

0.424

15.

Put on a pullover sweater

-1.27

0.144

-1.57

4.864

0.088

2.902

0.058

4.

Prepare a meal

-1.219

0.154

-1.863

3.585

0.167

2.335

0.101

9.

Make a bed*

-1.13

0.143

-2.106

7.508

0.023

6.288

0.002

2.

Write

-1.051

0.162

0.177

1.805

0.406

0.658

0.519

29.

Difficulty sleeping

-1.017

0.137

0.365

0.067

0.967

0.066

0.936

10.

Carry a shopping bag or briefcase

-0.857

0.127

-1.072

2.319

0.314

1.049

0.353

26.

Tingling*

-0.817

0.134

2.186

8.396

0.015

2.299

0.104

22.

Interference with normal social activities

-0.808

0.139

1.213

4.652

0.098

1.024

0.362

8.

Garden or do yard work*

-0.701

0.13

-2.199

6.767

0.034

4.432

0.014

23.

Limitation in work or other regular daily activities

-0.657

0.13

-0.221

3.192

0.203

1.406

0.249

27.

Weakness

-0.495

0.124

-0.073

3.467

0.177

1.319

0.271

24.

Pain in arm, shoulder or hand

-0.434

0.127

1.662

2.928

0.231

1.191

0.307

25.

Pain when performing specific activity

-0.423

0.121

-0.097

0.791

0.673

0.417

0.660

5.

Push open a heavy door

0.197

0.135

-1.156

3.168

0.205

1.933

0.148

16.

Use a knife to cut food

0.252

0.142

-0.176

0.794

0.672

0.22

0.803

13.

Wash or blow dry hair

0.375

0.126

-0.996

0.306

0.858

0.182

0.833

17.

Recreational activities which require little effort

0.376

0.141

-0.364

2.547

0.280

1.861

0.159

6.

Place an object on a shelf above head

0.647

0.127

-1.047

0.578

0.749

0.287

0.751

7.

Do heavy household chores*

0.813

0.119

-2.302

7.891

0.019

5.143

0.007

14.

Wash your back

0.923

0.112

-0.559

0.837

0.658

0.34

0.712

21.

Sexual activities*

0.923

0.127

1.937

16.732

0.000

2.796

0.065

12.

Change a lightbulb overhead

0.944

0.118

-0.384

3.054

0.217

1.355

0.261

11.

Carry a heavy object (over 10 lbs)

1.094

0.11

-0.171

0.697

0.706

0.475

0.623

19.

Recreational activities which move arm freely

1.132

0.111

-0.867

1.026

0.599

0.741

0.478

28.

Stiffness*

1.223

0.109

3.315

11.746

0.003

4.221

0.017

18.

Recreational activities with force or impact

1.277

0.111

-0.14

0.718

0.698

0.246

0.782

1.

Open a tight or new jar

1.639

0.111

0.37

0.582

0.747

0.165

0.848

30.

Feeling less capable, less confident or less useful*

1.714

0.098

2.937

13.022

0.001

2.839

0.062

  1. Positive location (measure) numbers mean harder items; negative location means easier items.
  2. Abbreviation: SE, standard error.
  3. Bolded items: outside the ±2.5 range for fit residuals.
  4. *fit residuals with significant chi-square and\or F-statistics (p <0.05).
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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