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Table 3 Standardized factor loadings in the bifactor model (Bifactor 2)

From: Viability of a MSQOL-54 general health-related quality of life score using bifactor model

Scales

Items

Factor loading

General HRQOL factor

Group factor

Physical function

3. Vigorous activities

0.553

0.445

4. Moderate activities

0.594

0.622

5. Lift, carry groceries

0.554

0.620

6. Climb several flights

0.569

0.665

7. Climb one flight

0.533

0.695

8. Bend, kneel

0.551

0.594

9. Walk mile

0.555

0.669

10. Walk several blocks

0.526

0.734

11. Walk one block

0.488

0.726

12. Bath, Dress

0.461

0.523

Role limitations due to physical problems

13. Cut down time

0.542

0.537

14. Accomplished less

0.571

0.571

15. Limited in kind

0.581

0.645

16. Had difficulty

0.594

0.586

Role limitations due to emotional problems

17. Cut down time

0.504

0.646

18. Accomplished less

0.515

0.699

19. Not careful

0.509

0.592

Bodily pain

21. Pain magnitude

0.575

0.702

22. Pain interfere with work

0.611

0.653

52. Pain interfere with enjoyment

0.601

0.652

Emotional wellbeing

24. Nervous person

0.371

0.531

25. Down in dumps

0.561

0.585

26. Peaceful

0.562

0.369

28. Blue/Sad

0.594

0.592

30. Happy

0.535

0.432

Energy

23. Pep/life

0.713

0.206

27. Energy

0.717

0.245

29. Worn out

0.624

0.546

31. Tired

0.620

0.602

32. Rested on walking in the morning

0.519

0.281

Health perceptions

1. EVGFP rating

0.638

0.452

34. Sick easier

0.417

0.269

35. As healthy

0.463

0.575

36. Health to get worse

0.450

0.233

37. Health excellent

0.590

0.659

Cognitive function

42. Concentration and thinking

0.591

0.710

43. Sustained attention

0.576

0.700

44. Memory

0.467

0.708

45. Others note troubles with memory/concentration

0.436

0.564

Health distress

38. Discouraged

0.729

0.508

39. Frustrated

0.712

0.544

40. Worried for life

0.624

0.543

41. Weighed down

0.694

0.563

Sexual function

46. Lack if sexual interest

0.346

0.684

47. Erection/Lubrication

0.299

0.758

48. Orgasm

0.348

0.724

49. Satisfy sexual partner

0.378

0.656

Social function

20. Social extent, physical health

0.737

33. Social time

0.758

51. Social extent, bowel or bladder

0.505

Overall quality of life

53. 0–10 NRS rating

0.735

54. TUMMMPO rating

0.685

  1. EVGFP, Excellent, Very good, Good, Fair, Poor. HRQOL, health-related quality of life. NRS, Numeric Rating Scale. TUMMMPO, Terrible, Unhappy, Mostly dissatisfied, Mixed—about equally satisfied and dissatisfied, Pleased, Delighted
  2. Correlations between residuals: 0.524 (items 53 and 54); 0.411 (items 20 and 33)
  3. Coefficients < 0.40 are reported in bold; all the loadings are statistically significant at p < 0.001