Table 6. Factor loadings of the Turkish version of the HOOS according to the confirmatory factor analysis.
| Factor | Item | Estimate | SE | Z | p |
| Symptoms (S) | S1. Do you feel grinding, hear clicking or any other type of noise from you hip? | 0.650 | 0.0963 | 6.75 | < 0.001 |
| S2. Difficulties spreading legs wide apart. | 0.492 | 0.0639 | 7.69 | < 0.001 | |
| S3. Difficulties to stride out when walking | 0.584 | 0.0645 | 9.06 | < 0.001 | |
| S4. How severe is your hip joint stiffness after first wakening in the morning? | 0.890 | 0.0611 | 14.55 | < 0.001 | |
| S5. How severe is your hip stiffness after sitting, lying or resting later in the day? | 0.745 | 0.0649 | 11.48 | < 0.001 | |
| Pain (P) | P1. How often is your hip painful? | 0.716 | 0.0537 | 13.34 | < 0.001 |
| P2. Straightening your hip fully | 0.729 | 0.0543 | 13.41 | < 0.001 | |
| P3. Bending your hip fully | 0.755 | 0.0583 | 12.96 | < 0.001 | |
| P4. Walking on flat surface | 0.726 | 0.0596 | 12.17 | < 0.001 | |
| P5. Going up or down stairs | 0.792 | 0.0519 | 15.25 | < 0.001 | |
| P6. At night while in bed | 0.718 | 0.0700 | 10.27 | < 0.001 | |
| P7. Sitting or lying | 0.821 | 0.0627 | 13.09 | < 0.001 | |
| P8. Standing upright | 0.718 | 0.0587 | 12.23 | < 0.001 | |
| P9. Walking on a hard surface (asphalt, concrete, etc.) | 0.770 | 0.0545 | 14.13 | < 0.001 | |
| P10. Walking on an uneven surface | 0.800 | 0.0509 | 15.71 | < 0.001 | |
| ADL (A) | A1. Descending stairs | 0.886 | 0.0717 | 12.36 | < 0.001 |
| A2. Ascending stairs | 0.822 | 0.0556 | 14.79 | < 0.001 | |
| A3. Rising from sitting | 0.811 | 0.0623 | 13.03 | < 0.001 | |
| A4. Standing | 0.667 | 0.0607 | 11.00 | < 0.001 | |
| A5. Bending to floor/pick up an object | 0.868 | 0.0611 | 14.21 | < 0.001 | |
| A6. Walking on flat surface | 0.698 | 0.0571 | 12.22 | < 0.001 | |
| A7. Getting in/out of car | 0.817 | 0.0568 | 14.39 | < 0.001 | |
| A8. Going shopping | 0.844 | 0.0568 | 14.86 | < 0.001 | |
| A9. Putting on socks/stockings | 0.697 | 0.0606 | 11.51 | < 0.001 | |
| A10. Rising from bed | 0.890 | 0.0600 | 14.82 | < 0.001 | |
| A11. Taking off socks/stockings | 0.683 | 0.0664 | 10.30 | < 0.001 | |
| A12. Lying in bed (turning over, maintaining hip position) | 0.793 | 0.0598 | 13.25 | < 0.001 | |
| A13. Getting in/out of bath | 0.816 | 0.0615 | 13.26 | < 0.001 | |
| A14. Sitting | 0.724 | 0.0591 | 12.26 | < 0.001 | |
| A15. Getting on/off toilet | 0.784 | 0.0608 | 12.90 | < 0.001 | |
| A16. Heavy domestic duties (moving heavy boxes, scrubbing floors, etc.) | 0.799 | 0.0572 | 13.96 | < 0.001 | |
| A17. Light domestic duties (cooking, dusting, etc.) | 0.709 | 0.0600 | 11.80 | < 0.001 | |
| Sport/Rec (SP) | SP1. Squatting | 0.686 | 0.0523 | 13.13 | < 0.001 |
| SP2. Running | 0.678 | 0.0507 | 13.37 | < 0.001 | |
| SP3. Twisting/pivoting on your injured hip | 0.797 | 0.0559 | 14.24 | < 0.001 | |
| SP4. Walking on uneven surface | 0.787 | 0.0606 | 12.99 | < 0.001 | |
| QoL (Q) | Q1. How often are you aware of your hip problem? | 0.610 | 0.0616 | 9.90 | < 0.001 |
| Q2. Have you modified your life style to avoid potentially damaging activities to your hip? | 0.527 | 0.0711 | 7.41 | < 0.001 | |
| Q3. How much are you troubled with lack of confidence in your hip? | 0.732 | 0.0644 | 11.37 | < 0.001 | |
| Q4. In general, how much difficulty do you have with your hip? | 0.879 | 0.0531 | 16.54 | < 0.001 | |
| Model Fit Statistics: CFI=0.652, TLI=0.628, and RMSEA=0.145. HOOS: Hip disability and Osteoarthritis Outcome Score; SE: Standard error; ADL: Activities of daily living; Sport/Rec: Sport and recreation; QoL: Quality of life; CFI: Comparative Fit Index; TLI: Tucker-Lewis Index; RMSEA: Root Mean Square Error of Approximation. | |||||