Table 1

Fit of "Body Functions" item bank to Rasch model (after rescoring) (n = 266)

Item

Location

SE

Individual Item Fit Residual

Chi-Square Test Statistics

p


WHODAS II – 1.1. In the last 30 days, how much difficulty did you have in concentrating on doing something for ten minutes?

1.518

0.140

0.879

8.326

0.040

WHODAS II – 1.3. In the last 30 days, how much difficulty did you have in analyzing and finding solutions to problems in day to day life?

3.084

0.151

0.042

0.498

0.919

WHODAS II – 1.5. In the last 30 days, how much difficulty did you have in generally understanding what people say?

2.245

0.153

-0.067

1.549

0.671

WHODAS II – 1.6. In the last 30 days, how much difficulty did you have in starting and maintaining a conversation?

3.521

0.166

-0.147

0.985

0.805

WHODAS II – 4.1. In the last 30 days, how much difficulty did you have in dealing with people you do not know?

3.878

0.196

0.383

3.269

0.352

WHODAS II – 4.2. In the last 30 days, how much difficulty did you have in maintaining a friendship?

4.110

0.221

-0.495

7.708

0.052

WHODAS II – 4.3. In the last 30 days, how much difficulty did you have in getting along with people who are close to you?

3.084

0.185

-1.006

1.652

0.648

WHODAS II – 4.4. In the last 30 days, how much difficulty did you have in making new friends?

3.953

0.208

0.021

2.977

0.395

WHODAS II – 6.3. In the last 30 days, how much of a problem did you have living with dignity because of the attitudes and actions of others?

2.264

0.162

0.725

1.592

0.661

WHODAS II – 6.5. In the last 30 days, how much have you been emotionally affected by your health condition?

0.317

0.159

-0.237

2.529

0.470

RDQ 13. My back is painful almost all of the time

-2.956

0.179

-0.266

3.331

0.343

RDQ 18. I sleep less well because of my back

-1.661

0.152

0.655

1.915

0.590

RDQ 22. Because of back pain, I am more irritable and bad tempered with people than usual

-2.762

0.173

-1.237

1.950

0.583

NHP 1. I'm tired all the time

-3.530

0.203

-0.454

1.845

0.605

NHP 2. I have pain at night

-2.146

0.159

0.671

3.030

0.387

NHP 4. I have unbearable pain

0.093

0.159

1.423

3.156

0.368

NHP 6. I've forgotten what it's like to enjoy myself

-0.859

0.150

-0.427

3.987

0.263

NHP 7. I'm feeling on edge

-1.948

0.156

-2.143

8.312

0.040

NHP 9. I feel lonely

-0.680

0.151

-1.264

6.513

0.089

NHP 13. I'm waking up in the early hours of the morning

-2.018

0.157

1.478

11.751

0.008

NHP 15. I'm finding it hard to make contact with people

1.062

0.180

-1.854

8.311

0.040

NHP 16. The days seem to drag

-0.427

0.153

-2.530

9.019

0.029

NHP 20. I lose my temper easily these days

-2.018

0.157

-0.733

0.632

0.889

NHP 21. I feel there is nobody that I am close to

-0.512

0.152

-1.411

8.458

0.037

NHP 22. I lie awake for most of the night

-1.129

0.150

-1.092

5.465

0.141

NHP 23. I feel as if I'm losing control

-0.904

0.150

-1.229

0.889

0.828

NHP 28. I'm in constant pain

-2.208

0.160

-0.693

3.152

0.369

NHP 29. It takes me a long time to get to sleep

-1.590

0.152

-0.154

6.140

0.105

NHP 30. I feel I am a burden to people

-0.420

0.153

-0.630

0.055

0.997

NHP 31. Worry is keeping me awake at night

-1.200

0.150

-2.118

5.686

0.128

NHP 32. I feel that life is not worth living

0.189

0.160

-0.895

1.724

0.632

NHP 34. I'm finding it hard to get along with people

1.249

0.186

-0.187

3.736

0.291

NHP 37. I wake up feeling depressed

-1.601

0.152

-1.579

2.496

0.476


WHODAS II: World Health Organization Disability Assessment Schedule II, 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