Table 2

Fit of "activity-participation" item bank to Rasch model (after rescoring) (n = 266)

Item

Location

SE

Individual Item Fit Residual

Chi-Square Test Statistics

p


WHODAS II – 2.1. In the last 30 days, how much difficulty did you have in standing for long periods such as 30 minutes?

0.132

0.116

2.141

6.255

0.100

WHODAS II – 2.2. In the last 30 days, how much difficulty did you have in standing up from sitting down?

1.846

0.152

-1.500

2.695

0.441

WHODAS II – 2.3. In the last 30 days, how much difficulty did you have in moving around inside your home?

2.752

0.146

-0.579

3.289

0.349

WHODAS II – 2.4. In the last 30 days, how much difficulty did you have in getting out of your home?

1.907

0.162

-1.600

5.242

0.155

WHODAS II – 2.5. In the last 30 days, how much difficulty did you have in walking a long distance such as a kilometer (or equivalent)?

0.110

0.114

-0.115

1.716

0.633

WHODAS II – 3.1. In the last 30 days, how much difficulty did you have in washing your whole body?

4.182

0.149

-0.844

2.264

0.519

WHODAS II – 3.2. In the last 30 days, how much difficulty did you have in getting dressed?

4.376

0.145

-0.638

1.780

0.619

WHODAS II – 3.3. In the last 30 days, how much difficulty did you have in eating?

4.163

0.156

1.320

0.275

0.965

WHODAS II – 3.4. In the last 30 days, how much difficulty did you have in staying by yourself for a few days?

2.540

0.130

2.009

7.187

0.066

WHODAS II – 5.3. In the last 30 days, how much difficulty did you have in doing most important households tasks well?

1.882

0.146

-1.405

4.658

0.199

WHODAS II – 5.4. In the last 30 days, how much difficulty did you have in getting all the household work done that you needed to do?

-0.038

0.115

-0.758

5.290

0.152

WHODAS II – 5.5. In the last 30 days, how much difficulty did you have in getting your household work done as quickly as needed?

-0.144

0.120

-0.608

2.190

0.534

WHODAS II – 6.1. In the last 30 days, how much of a problem did you have in joining in community activities (for example, festivities, religious or other activities) in the same way as anyone else can

1.911

0.119

0.471

0.456

0.928

WHODAS II – 6.2. In the last 30 days, how much of a problem did you have because of barriers or hindrances in the world around you?

3.722

0.142

1.391

6.266

0.099

WHODAS II – 6.8. In the last 30 days, how much of a problem did you have in doing things by yourself for relaxation or pleasure?

2.115

0.141

-0.986

0.793

0.851

ODI 4. Walking

3.082

0.106

0.361

7.119

0.068

ODI 6. Standing

0.651

0.104

0.447

4.730

0.193

ODI 9. Social Life

1.578

0.102

1.585

11.801

0.008

ODI 10. Travelling

0.216

0.137

-1.365

1.964

0.580

RDQ 1. I stay at home most of the time because of my back

-0.396

0.156

-0.836

2.526

0.471

RDQ 2. I change position frequently to try to get my back comfortable

-2.904

0.274

-0.207

2.106

0.551

RDQ 3. I walk more slowly than usual because of my back

-1.705

0.198

-1.807

9.433

0.024

RDQ 4. Because of my back, I am not doing any jobs that I usually do around the house

-1.064

0.173

-0.307

2.586

0.460

RDQ 5. Because of my back, I use handrail to get upstairs

-1.862

0.205

-1.482

4.863

0.182

RDQ 6. Because of my back, I lie down to rest more often

-1.745

0.200

-0.001

1.760

0.624

RDQ 7. Because of my back, I have to hold on to something to get out of an easy chair

-0.482

0.158

0.522

2.695

0.441

RDQ 8. Because of my back, I try to get other people to do things for me

-0.252

0.153

1.712

8.550

0.036

RDQ 9. I get dressed more slowly than usual because of my back

-0.522

0.159

-0.079

1.594

0.661

RDQ 10. I only stand up for short periods of time because of my back

-2.219

0.225

-1.558

4.238

0.237

RDQ 11. Because of my back, I try not to bend or kneel down

-3.023

0.284

-0.823

2.227

0.527

RDQ 12. I find it difficult to get out of chair because of my back

-0.647

0.162

-0.527

3.033

0.387

RDQ 14. I find it difficult to turn over in bed because of my back

-1.157

0.177

-1.006

4.851

0.183

RDQ 16. I have trouble putting on my sock (or stockings) because of the pain in my back

-0.753

0.164

-0.316

2.821

0.420

RDQ 17. I can only walk short distances because of my back pain

-0.745

0.164

-2.068

8.215

0.042

RDQ 19. Because of my back pain, I get dressed with the help of someone else

3.879

0.253

-0.611

4.508

0.212

RDQ 21. I avoid heavy jobs around the house because of my back

-1.734

0.199

0.091

1.217

0.749

RDQ 23. Because of my back, I go upstairs more slowly than usual

-2.556

0.247

-1.294

3.386

0.336

RDQ 24. I stay in bed most of the time because of my back

1.959

0.157

0.786

7.979

0.046

NHP 8. I find it painful to change position

-1.594

0.193

-0.478

5.599

0.133

NHP 11. I find it hard to bend

-1.954

0.210

-1.284

2.197

0.533

NHP 12. Everything is an effort

-0.805

0.166

-1.470

7.025

0.071

NHP 18. I find it hard to reach for things

-2.090

0.217

-1.710

3.055

0.383

NHP 19. I'm in pain when I walk

-1.740

0.200

-1.263

3.802

0.284

NHP 24. I'm in pain when I'm standing

-2.701

0.257

-0.611

0.774

0.856

NHP 25. I find it hard to get dressed by myself

1.174

0.146

1.298

2.948

0.400

NHP 26. I soon run out of energy

-2.134

0.220

5.455

1.989

0.575

NHP 27. I find it hard to stand for long (e.g., at the kitchen sink, waiting in a line)

-3.334

0.314

-1.092

1.178

0.758

NHP 36. I'm in pain when going up or down stairs

-2.459

0.240

-1.310

5.191

0.158

NHP 38. I'm in pain when I'm sitting

-1.417

0.186

1.374

2.394

0.495


WHODAS II: World Health Organization Disability Assessment Schedule II, ODI: Oswestry Disability Index, RDQ: Roland Morris Low Back Pain Disability Questionnaire, NHP: Nottingham Health Profile, SE: Standard Error

Elhan et al. BMC Musculoskeletal Disorders 2008 9:166   doi:10.1186/1471-2474-9-166

Open Data