Table 1 Kinematic parameters
Parameter | Abbreviation | Description/formula |
|---|---|---|
Measurement parameter-determined for each subject in measurement session 1 + 2 (test-retest) | ||
 Range of motion | ROMG1/G2, ROMV1/V2 | Maximum range of motion measured within a method and session |
 Test-retest difference | DIFFG/DIFFV | Individual test-retest difference of ROM: DIFFG = ROMG1 − ROMG2/DIFFV = ROMV1 − ROMV2 |
Test-retest and repeatability parameter—between test and retest within the same method over all subjects | ||
 Mean difference | meanDG/meanDV | Mean DIFFG/DIFFV |
 Standard deviation of the difference | SDDG/SDDV | Standard deviation of DIFFG/DIFFV |
 Standard error of measurement | SEMG/SEMV | Estimated measurement precision according to de Vet24: SEM = SDD/√2 |
 Minimal detectable difference | MDDG/MDDV | MDD = 1.96 × SDD |
 % within 5° or 10° | PDG < 5° or < 10°/PDV < 5° or < 10° | Percentage of subjects with an absolute |DIFFG|/|DIFFV| smaller than 5° or 10° |
 Intraclass correlation coefficient | ICCG/ICCV | Intraclass correlation coefficient (3,1) of the test-retest measurement of the ROM |
Method comparison—between measurement methods | ||
 Mean ROM | MeanromG/MeanromV | Mean ROM of test and retest of each subjects averaged over all subjects |
 Standard deviation of ROM | SDromG/SDromV | Standard deviation of MeanromG/MeanromV |