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The relationship of baseline muscle thickness and cross-sectional area of rectus femoris with muscle strength (handgrip), muscle mass (fat-free mass) and physical performance (gait speed), assessed during hospitalization in a post-acute care unit. Abbreviations: CSA: Cross-sectional area, HG: Handgrip; MT: Muscle thickness, RF: Rectus femoris muscle. r: the Pearson coefficient, CI: Confidence Interval.
