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Table 4 Correlations between muscle strength and independent variables in healthy women (n = 93)

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

Independent 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) 0.62 (< 0.001) 0.60 (< 0.001) 0.33 (0.001)
Isometric elbow flexion force (N) 0.62 (< 0.001) 0.74 (< 0.001) 0.40 (< 0.001)
Hand-grip force (N) 0.61 (< 0.001) 0.74 (< 0.001) 0.44 (< 0.001)
6MWT (m) 0.33 (0.001) 0.40 (< 0.001) 0.44 (< 0.001)
Age (years) − 0.28 (0.007) − 0.15 (0.163) − 0.23 (0.025) − 0.29 (0.005)
BMI − 0.07 (0.538) 0.24 (0.023) − 0.18 (0.086) − 0.41 (< 0.001)
SF36 PF (0–100) 0.14 (0.170) 0.21 (0.047) 0.19 (0.065) 0.33 (0.001)
  1. 6MWT Six Minute Walk Test, BMI Body Mass Index, SF36 PF Short Form 36 physical function subscale