Table 4 Diagnostic accuracy of each knee pain question to identify participants with knee radiographic KL ≥ 2, total and by sex
Question | All participants | Female | Male | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
n (%) | Sensitivity% | 1-Specificity | Like-lihood Ratio | n (%) | Sensitivity% | 1-Specificity | Like-lihood Ratio | n (%) | Sensitivity% | 1-Specificity% | Like-lihood Ratio | |
“Have you ever had knee pain not related with any trauma or injury?” (yes) | 280 (42.2) | 53.2 | 33.2 | 1.60 | 192 (51.8) | 63.9 | 41.6 | 1.54 | 88 (30.1) | 39.4 | 22.5 | 1.75 |
“In the last year did you have more than 3 knee pain episodes?”(yes) | 172 (61.0) | 71.4 | 47.0 | 1.52 | 131 (68.2) | 78.7 | 54.8 | 1.44 | 41 (45.6) | 56.6 | 29.7 | 1.90 |
“During the last 6 months did knee pain last longer than a week?”(yes) | 72 (25.5) | 32.9 | 15.7 | 2.10 | 50(26.0) | 33.3 | 16.7 | 2.0 | 22(24.4) | 32.1 | 13.5 | 2.37 |
“During the last month did you have knee pain?” (yes) | 178 (62.9) | 72.8 | 49.6 | 1.47 | 131 (67.9) | 76.1 | 57.1 | 1.33 | 47 (52.2) | 66.0 | 32.4 | 2.04 |