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