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Table 3 Stepwise regression analysis for elderly

From: Relationships between muscle strength and multi-channel surface EMG parameters in eighty-eight elderly

MVC = 34.619*MT + 349.554*RMS + 8.921*NRMS R = 0.664, R2 = 0.441, Adjusted R2 = 0.419
Dependent variables Independent variables Standardized regression coefficient P
MVC MT 0.519 < 0.001
  RMS 0.288 0.001
  NRMS 0.177 0.047
  1. MVC, maximal voluntary isometric knee extension joint torque; MT, Muscle thickness of vastus lateralis; RMS, root mean square of surface electromyography; NRMS, root mean square of surface electromyography for all channels in electrode grid at 65% of the maximal voluntary contraction normalized by that at 20% of the maximal voluntary contraction