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Table 7 Correlations between SF-36 total score and sub-scores and comfortable gait speed. Excluding the patients with MS (reducing to N = 36 or N = 35) did not alter which correlations were significant. * = p < 0.05

From: Long-term outcomes of semi-implantable functional electrical stimulation for central drop foot

QoL T1 (Stimulation OFF) T2 (Stimulation ON) T3 (Stimulation ON)
Total SF-36 r = 0.26 r = 0.47 r = 0.38
p = 0.11 p = 0.002* p = 0.020*
N = 39 N = 39 N = 38
SF-36-P r = 0.20 r = 0.41 r = 0.23
p = 0.23 p = 0.009* p = 0.17
N = 39 N = 39 N = 38
Pain score r = − 0.005 r = − 0.17 r = − 0.13
p = 0.98 p = 0.29 p = 0.44
N = 39 N = 39 N = 38
SF-36-E r = 0.26 r = 0.25 r = 0.36
p = 0.12 p = 0.12 p = 0.028*
N = 39 N = 39 N = 38
Health change r = − 0.037 r = 0.20 r = − 0.079
p = 0.83 p = 0.24 p = 0.64
N = 39 N = 39 N = 38