From: Knee osteoarthritis pre-screening questionnaire (KOPS): cross-cultural adaptation and measurement properties of the brazilian version—KOPS Brazilian version
Variable
KL ≥ 1
KL ≥ 2
Area under the ROC curve
0.740
0.774
Standard error
0.065
0.037
95% Confidence interval
0.674 to 0.799
0.709 to 0.830
Z-statistic
3.645
7.393
Significance level
< 0.001
Sensitivity
78.38
80.54
Specificity
60.00
60.78