Fig. 3From: Early initiation of a strength training based rehabilitation after lumbar spine fusion improves core muscle strength: a randomized controlled trialIsometric trunk muscle strength (Nm) (group mean). p1—difference between the baseline’s and 3 months’ mean for the training group. p2—difference between the 3 months’ and 18 months’ mean for the control group. p3—difference between the baseline’s and 18 months’ mean for the training group. p4—difference between the baseline’s and 18 months’ mean for the control group. ANOVA1,2—one-way repeated-measures ANOVA between the baseline’s and 3 months’ meanBack to article page