Abstract：
:Multicentre studies are rare in three dimensional motion analyses due to challenges associated with combining waveform data from different centres. Principal component analysis (PCA) is a statistical technique that can be used to quantify variability in waveform data and identify group differences. A correction technique based on PCA is proposed that can be used in post processing to remove nuisance variation introduced by the differences between centres. Using this technique, the waveform bias that exists between the two datasets is corrected such that the means agree. No information is lost in the individual datasets, but the overall variability in the combined data is reduced. The correction is demonstrated on gait kinematics with synthesized crosstalk and on gait data from knee arthroplasty patients collected in two centres. The induced crosstalk was successfully removed from the knee joint angle data. In the second example, the removal of the nuisance variation due to the multicentre data collection allowed significant differences in implant type to be identified. This PCA-based technique can be used to correct for differences between waveform datasets in post processing and has the potential to enable multicentre motion analysis studies.
journal_name
Gait Posturejournal_title
Gait & postureauthors
Clouthier AL,Bohm ER,Rudan JF,Shay BL,Rainbow MJ,Deluzio KJdoi
10.1016/j.gaitpost.2016.10.008subject
Has Abstractpub_date
2017-01-01 00:00:00pages
153-158eissn
0966-6362issn
1879-2219pii
S0966-6362(16)30610-5journal_volume
51pub_type
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