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Table 3 Correlations between muscle strength, walking ability, and variables in women with FM (n = 118)

From: Controlled, cross-sectional, multi-center study of physical capacity and associated factors in women with fibromyalgia

Variables Isometric knee extension force (N) Isometric elbow flexion force (N) Hand-grip force (N) 6MWT (m)
  rs (p-value) rs (p-value) rs (p-value)  
Isometric knee extension force (N) 0.72 (< 0.001) 0.61 (< 0.001) 0.36 (< 0.001)
Isometric elbow flexion force (N) 0.72 (< 0.001) 0.75 (< 0.001) 0.25 (0.006)
Hand-grip force (N) 0.61 (< 0.001) 0.75 (< 0.001) 0.34 (< 0.001)
6MWT (m) 0.36 (< 0.001) 0.25 (0.006) 0.34 (< 0.001)
Age (years) −0.19 (0.043) −0.041 (0.656) −0.10 (0.276) − 0.24 (0.009)
BMI 0.19 (0.039) 0.03 (0.792) − 0.05 (0.589) − 0.25 (0.007)
Symptom duration (years) − 0.28 (0.002) − 0.32 (< 0.001) − 0.23 (0.012) − 0.26 (0.004)
SF36 PF (0–100) 0.23 (0.011) 0.11 (0.23) 0.16 (0.089) 0.42 (< 0.001)
  1. 6MWT Six Minute Walk Test, BMI Body Mass Index, SF36 PF Short Form 36 physical function subscale