Table 2.
Compilation of characteristic components of function with communalities and the variance explained by the component. Only those coefficients that had a considerable influence (more than 0.5) on the component are presented in order to ease interpretation of the obtained components. The first two letters of each functional parameter indicate the test domain: QS, quiet standing; GA, gait analysis. The first two letters after the colon indicate either: Mn, mean; SD, standard deviation; CV, coefficient of variation. The remaining acronyms indicate the actual measure as described in the methods section. VEL, velocity of sway; AREA, area of sway; FREQ, frequency of sway; EA, elliptical area of sway; AP, anterior–posterior direction; ML, medio-lateral direction (if not applicable, the total sway path was analysed); QEC, quiet standing eyes closed; CAD, cadence; Str-T, stride time; Stn-T, stance time; DST, double support time; SW, swing time; Str-Len, stride length; Stp-Len, step length; MaxFC, maximum foot clearance; R, right foot; L, left foot.
| functional measures | static balance | temp. gait | spatial gait | temp. variab., right | temp. variab., left | spatial variab. | dynamic balance | communalities |
|---|---|---|---|---|---|---|---|---|
| QS: Mn-VEL-QEC | 0.988 | 0.989 | ||||||
| QS: Mn-VEL-AP-QEC | 0.985 | 0.984 | ||||||
| QS: Mn-VEL-ML-QEC | 0.985 | 0.985 | ||||||
| QS: Mn-AREA-QEC | 0.959 | 0.952 | ||||||
| QS: Mn-FREQ-AP-QEC | 0.955 | 0.921 | ||||||
| QS: Mn-EA-QEC | 0.954 | 0.934 | ||||||
| QS: Mn-FREQ-QEC | 0.952 | 0.914 | ||||||
| QS: Mn-FREQ-ML-QEC | 0.822 | 0.729 | ||||||
| GA: Mn-CAD | −0.937 | 0.941 | ||||||
| GA: Mn-Str-T-L | 0.926 | 0.981 | ||||||
| GA: Mn-Stn-T-L | 0.871 | 0.968 | ||||||
| GA: Mn-DST-L | 0.773 | 0.846 | ||||||
| GA: Mn-Sw-T-R | 0.744 | 0.709 | ||||||
| GA: Mn-DST-R | 0.728 | 0.840 | ||||||
| GA: Mn-Str-Len-R | 0.920 | 0.935 | ||||||
| GA: Mn-Str-Len-L | 0.918 | 0.929 | ||||||
| GA: Mn-Stp-Len | 0.902 | 0.913 | ||||||
| GA: Mn-MaxFC-R | 0.866 | 0.777 | ||||||
| GA: Mn-MaxFC-L | 0.856 | 0.765 | ||||||
| GA: CV-Stn-T-R | 0.988 | 0.993 | ||||||
| GA: CV-Str-T-R | 0.988 | 0.997 | ||||||
| GA: SD-Stn-T-R | 0.970 | 0.991 | ||||||
| GA: SD-Str-T-R | 0.969 | 0.993 | ||||||
| GA: CV-Str-T-L | 0.991 | 0.992 | ||||||
| GA: SD-Str-T-L | 0.983 | 0.987 | ||||||
| GA: SD-Stn-T-L | 0.979 | 0.987 | ||||||
| GA: SD-Str-Len-L | 0.949 | 0.956 | ||||||
| GA: CV-Str-Len-L | 0.938 | 0.961 | ||||||
| GA: CV-DST-L | 0.914 | 0.875 | ||||||
| GA: SD-DST-L | 0.858 | 0.841 | ||||||
| GA: SD-Sw-T-L | 0.572 | 0.624 | ||||||
| Variance explained by the component (%) | 23 | 15 | 14 | 13 | 11 | 7 | 7 |