Table 3 Rate of response and association of responses to individual questions about hip OA with symptomatic hip osteoarthritis (n = 1464)
From: Validation of a screening questionnaire for hip and knee osteoarthritis in old people
Question | n | Frequency of positive findings,% | Sensitivity,% (95% CI) | Specificity,% (95% CI) | Positive Predictive Value,% (95% CI) | Negative Predictive Value,% (95% CI) | Odds ratio (95% CI) | C statistics |
|---|---|---|---|---|---|---|---|---|
1. – During the last 12 months, have you often had pain in one or both your hips for one month or more? | 1316 | 56.69 | 87.09 (83.65, 90.53) | 54.94 (51.78, 58.10) | 42.49 (38.94, 46.04) | 91.75 (89.49, 94.01) | 8.22 (5.90, 11.46) | 0.712 |
2. – Has a doctor ever told you that you have osteoarthritis in one or both of your hips? | 1357 | 40.01 | 66.67 (61.92, 71.42) | 70.28 (67.42, 73.14) | 46.41 (42.22, 50.60) | 84.52 (82.04, 87.00) | 4.73 (3.67, 6.10) | 0.685 |
3. – Do you have a prosthesis in one or both of your hips? | 1362 | 4.92 | 16.04 (12.32, 19.76) | 99.29 (98.77, 99.81) | 89.55 (82.23, 96.87) | 75.75 (73.42, 78.08) | 26.78 (12.12, 59.19) | 0.577 |
4. – Have you ever had any surgical intervention in one or both of your hips? | 1366 | 3.07 | 8.22 (5.45, 10.99) | 98.89 (98.24, 99.54) | 73.81 (60.50, 87.12) | 73.87 (71.50, 76.24) | 7.97 (3.96, 16.02) | 0.536 |
5. – During the last 12 months, have you had stiffness in one or both of your hips for one month or more? | 1352 | 28.48 | 47.03 (41.94, 52.12) | 78.51 (75.94, 81.08) | 45.19 (40.22, 50.16) | 79.73 (77.20, 82.26) | 3.24 (2.51, 4.18) | 0.628 |
6. – During the last 12 months, have you had any of the following limitations because of pain or stiffness in one or both of your hips? |  |  |  |  |  |  |  |  |
   6.a. – Rising from a chair or toilet. | 1331 | 45.98 | 69.92 (65.24, 74.60) | 63.20 (60.15, 66.25) | 42.16 (38.25, 46.07) | 84.56 (81.92, 87.20) | 3.99 (3.08, 5.17) | 0.666 |
   6 b. – Putting on your stockings or shoes. | 1336 | 47.68 | 72.85 (68.33, 77.37) | 62.03 (58.97, 65.09) | 42.54 (38.70, 46.38) | 85.55 (82.94, 88.16) | 4.38 (3.37, 5.70) | 0.674 |
   6 c. – Walking 4 blocks (or 500 m) | 1326 | 42.76 | 69.11 (64.40, 73.82) | 67.40 (64.43, 70.37) | 44.97 (40.88, 49.06) | 84.98 (82.44, 87.52) | 4.62 (3.57, 5.99) | 0.683 |