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Table 5 Factor extraction: principal component analysis

From: Reliability and validity of the Chinese version of the Short Musculoskeletal Function Assessment questionnaire in patients with skeletal muscle injury of the upper or lower extremities

  Factor 1 Factor 2 Factor 3 Factor 4 Factor 5 Factor 6
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
  1. Substantial (≥0.4) factor loadings are marked bold