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. 2019 Jun 10;14:173. doi: 10.1186/s13018-019-1177-y

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