Table 2. Analysis of measurement properties according to guidelines of Terwee et al. 15 .
| Questionnaire | Cronbach's alpha Internal Consistency | Construct Validity P: Pearson's Correlation S: Spearman's Correlation | Reliability ICC | Ceiling and floor effects | Responsiveness effect size | Score | |
|---|---|---|---|---|---|---|---|
| Brazilian Portuguese | |||||||
| VISA-P 29 | 0,76 | Lysholm = 0,60 (P) | 0,91 | Absent | 0,97 | 5 | |
| LEFS 28 | 0,95 | IKDC = 0,82 (P) WOMAC total = 0,87 (P) VAS = - 0,60 (P) SF-36 role physical = 0,82 (P) | 0,96 | Absent | X | 4 | |
| IKDC 32 , 33 | 0,93 32 0,81 33 | SF-36 physical functioning = 0,75; 32 0,42 33 (P) SF-36 bodily pain = 0,63; 32 0,65 33 (P) SF-36 role physical = 0,79; 32 0,62 33 (P) WOMAC total = 0,85 32 (P) Lysholm = 0,89 32 (P) | 0,99 32 | Absent | X | 4 | |
| WOMAC 33 , 34 | 0,96 33 | VAS = 0,55-0,78 34 (S) HAQ = 0,72-0,90 34 (S) Lequesne = 0,73-0,91 34 (S) SF-36 physical functioning = 0,52 33 (P) SF-36 bodily pain = 0,58 33 (P) SF-36 role physical = 0,64 33 (P) | 0,73-0,98 34 | Absent 32 , 33 | X | 4 | |
| Lysholm 26 , 33 | 0,73 33 | VAS = - 0,60 26 (S) Lequesne = - 0,80 26 (S) SF-36 physical functioning = 0,70 26 (S); 0,41 33 (P) SF-36 bodily pain = 0,50 26 (S); 0,65 33 (P) SF-36 role physical = 0,40 26 (S); 0,56 33 (P) | 0,80-1,00 26 | Absent 33 | X | 4 | |
| ADLS-KOS 25 | 0,99 | SF-36 physical functioning = 0,85 (S) SF-36 bodily pain = 0,50 (S) SF-36 physical aspects = 0,46 (S) Lysholm = 0,78 (S) VAS = - 0,50 (S) | 0,99 | Absent 33 | X | 3 | |
| Lequesne 31 | X | WOMAC physical functioning = 0,83 (P); 0,77 (S) WOMAC bodily pain = 0,80 (P); 0,72 (S) WOMAC stiffness = 0,64 (P); 0,56 (S) | 0,99 | X | X | 2 | |
| SAS-KOS 24 | X | SF-36 physical functioning = 0,81 (S) SF-36 bodily pain = 0,40 (S) SF-36 physical aspects = 0,43 (S) Lysholm = 0,67 (S) VAS = - 0,35 (S) | 0,98 | X | X | 2 | |
| KSS 27 | 0,92-1,00 | X | X | X | X | 1 | |
| SPFD 30 | X | X | X | X | X | 0 | |
| Portuguese from Portugal | |||||||
| KOS-ADLS 19 | 0,91 | SF-36 physical functioning = 0,69 (S) SF-36 bodily pain = 0,55 (S) SF-36 physical aspects = 0,60 (S) VAS bodily pain = - 0,53 (S) VAS physical functioning = - 0,55 (S) | 0,97 | Absent | 0,62 | 5 | |
| KOOS 21 | 0,77-0,95 | SF-36 physical functioning = 0,41-0,69 (S) SF-36 bodily pain = 0,57-0,66 (S) SF-36 physical aspects = 0,41-0,69 (S) VAS bodily pain = - 0,40-(- 0,53) (S) VAS physical functioning = - 0,50-(- 0,58) (S) | 0,82-0,94 | Absent | 0,78-1,08 | 5 | |
| KOOS-PS 20 | 0,89 | KOOS = - 0,70-(- 0,92) (S) SF-36 physical functioning = - 0,58 (S) SF-36 bodily pain = - 0,69 (S) SF-36 physical aspects = - 0,51 (S) | 0,85 | X | 0,88 | 4 | |
| ICOAP 22 | 0,92 | KOOS bodily pain = - 0,68-(- 0,81) (S) KOOS symptoms = - 0,61-(- 0,73) (S) | 0,88-0,92 | X | X | 3 | |
| OKS 23 | 0,87 | SF-36 physical functioning = - 0,71 (S) SF-36 bodily pain = - 0,77 (S) SF-36 physical aspects = - 0,46 (S) VAS bodily pain = 0,44 VAS physical functioning = 0,39 | 0,97 | X | X | 3 | |
X = Measurement property not tested. HAQ: Health Assessment Questionnaire; IKDC = International Knee Documentation Committee; Lequesne = Lequesne Algofunctional Questionnaire; SAS-KOS = Sports Activity Scale.