Table 5 Factor extraction: principal component analysis

Difficulty to…

 1. Get in or out a low chair

.784

.050

−.201

.052

−.119

.261

 2. Open bottles

−.153

−.121

.888

.129

.008

−.015

 3. Shop groceries

.896

−.095

−.068

−.071

.229

.062

 4. Climb stairs

1.003

−.063

−.227

.004

−.016

.040

 5. Make a fist

−.259

−.070

.880

.092

−.116

.041

 6. Use the bathtub or shower

.697

−.047

.042

.000

.331

.129

 7. Get comfortable to sleep

.242

.031

.122

.104

.094

.650

 8. Bend or Kneel down

.860

−.017

−.194

.064

−.066

.185

 9. Use buttons or zippers

−.127

−.005

.899

−.015

.041

.088

 10. Cut own fingernails

.187

.198

.524

−.242

.052

.173

 11. Get dressed

.266

.137

.438

−.177

.217

.167

 12. Walk

.976

−.020

−.172

−.048

−.006

.051

 13. Move after sitting or lying down

.751

.035

−.074

.078

−.189

.246

 14. Go out by yourself

.944

−.096

−.064

−.023

.165

−.002

 15. Drive

.408

−.078

.140

−.010

.495

.016

 16. Clean yourself after going to the bathroom

.577

.008

.215

−.006

.168

.206

 17. Turn knobs or levers

.008

−.025

.796

.034

−.037

.098

 18. Write or type

.008

−.137

.783

.191

−.076

−.113

 19. Pivot

.627

−.037

.070

.100

.133

.291

 20. Do your physical recreational activities

.810

.048

.004

−.045

.121

−.115

 21. Do your leisure activities

.677

.048

.178

−.021

.221

−.015

 22. Be sexually active

.269

−.023

−.111

.214

.636

.095

 23. Do light housework

.580

.026

.336

−.047

.170

−.117

 24. Do heavy housework

.723

.069

.207

−.008

.068

−.163

 25. Do your usual work

.643

.229

.168

−.067

.029

−.197

Frequency…

 26. Walk with a limp

.653

.101

−.203

.283

−.054

−.233

 27. Avoid using painful limb or back

.447

.297

.063

.060

−.148

−.268

 28. Leg locked or giving-away

.313

−.120

.085

.574

−.184

.178

 29. Problems with concentration

−.119

.092

.058

.722

.188

.235

 30. Doing too much one day affecting what you do the next day

−.046

−.025

.022

.762

.253

.087

 31. Acting irritated towards those around you

−.221

.122

−.143

.679

.410

−.096

 32. Being tired

.035

−.044

.139

.801

.005

.032

 33. Feeling disabled

.177

.039

.202

.633

−.027

−.134

 34. Feeling angry or frustrated because of injury

.086

.342

.014

.430

−.047

−.094

Bothered by…

 35. Problems using arms or legs

.014

.832

.139

−.112

−.332

.040

 36. Problems using your back

.040

.376

.366

.166

−.270

.042

 37. Problems doing chores in and around home

.163

.672

.004

.033

.115

−.100

 38. Problems with taking care of personal hygiene

.230

.574

.079

−.075

.192

−.039

 39. Problems with sleep and rest

−.158

.721

.005

.091

.048

.393

 40. Problems with leisure or recreational activities

.043

.817

−.158

.028

.196

.024

 41. Problems with important people in your life

−.100

.797

−.130

.059

.145

.027

 42. Problems with thinking, concentration, or remembering

−.202

.593

.022

.272

.132

.144

 43. Problems coping with your injury or signs of wear

−.019

.878

−.087

−.022

−.241

−.002

 44. Problems doing usual work

.129

.741

−.159

.059

.210

−.034

 45. Problems feeling dependent on others

.007

.782

−.069

.018

.170

.015

 46. Problems with stiffness and pain

.187

.749

.049

−.091

−.313

.054