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Table 5 Association between dynamic muscle strength and functional performance tests, SF-36 subscale and fatigue score

From: Low dynamic muscle strength and its associations with fatigue, functional performance, and quality of life in premenopausal patients with systemic lupus erythematosus and low disease activity: a case–control study

Dependent variable Independent variable β ^ Standard error R2 P-value
1-RM-total, kg Role-physical functioning (SF-36) -0.38 0.09 0.14 < 0.001
  Handgrip test 2.09 0.61 0.22 0.0027
  Role-emotional functioning (SF-36) 0.23 0.08 0.34 0.0125
  Timed chair-stand test 1.61 0.53 0.42 0.0065
  Fatigue (FSS) -9.80 4.13 0.52 0.0218
  1. β ^ = parameter estimate, R2 = coefficient of determination; 1-RM = one repetition maximum is the largest possible load of a particular movement; 1-RM -total = sum of total load lifted in the 1-RM tests (i.e., leg press, leg extension, leg curl, chest press, and lat pulldown); SF-36 self-administered health questionnaire - Short Form Health Survey 36, FSS fatigue severity scale.