Table 10 Summary of principal component decompositions of survey data
Category | PC ID | Component score (PVCa) (%) | Dominant positive correlation(s)b | Dominant negative correlation(s)b |
|---|---|---|---|---|
Priority-Function | Pr-Fn-PC1 | 37.8% | Speed of Functioning, Lifestyle functionality; Stair Descent | Incline & Decline |
Priority-Function | Pr-Fn-PC2 | 14.5% | Stair Ascent | Adaptability to velocity; function re: work |
Priority-Function | Pr-Fn-PC3 | 13.4% | Stability of support (1°); adaptability to gait speed (2°) | Running |
Priority-Function | Pr-Fn-PC4 | 11.1% | Work functionality (1°); Stair Ascent (2°) | Uneven terrain |
Priority—Active Assistance | Pr-AA-PC1 | 22.4% | Sit-to-stand, stand-to-sit | Fast gait, stair descent, decline gait |
Priority—Active Assistance | Pr-AA-PC2 | 18.4% | Gait on level ground; gait at usual speed | Decline gait, stair descent |
Priority—Active Assistance | Pr-AA-PC3 | 16.1% | Gait incline, stair ascent | Moments of instability |
Priority—Active Assistance | Pr-AA-PC4 | 11.1% | Instability recovery, Level gait at usual speed, incline | Fast gait, stair descent |
Priority—Characteristics | Pr-GC-PC1 | 20.3% | Battery & Transportability | Aesthetics, noisiness |
Priority—Characteristics | Pr-GC-PC2 | 17.4% | Water resistance, weight, reliability, | comfort |
Priority—Characteristics | Pr-GC-PC3 | 14.8% | Cost | Cleanability |
Priority—Characteristics | Pr-GC-PC4 | 11.9% | Weight & Portability | Reliability, noisiness |