Additional file 12.

Effect estimates (standardised mean differences) of moderate versus low intensity on pain and depressed mood post treatment. Forest plots show standardised mean differences (effect sizes) from the random effects model (inverse variance method). A negative effect indicates that the endpoint score of the outcome in the exercise group with moderate intensity is lower than in exercise group with low intensity. The pooled (all studies together) effect size is weighted by the inverse variance of each study. IV, inverse variance (method); SD, standard deviation; Std. mean difference, standardised mean differences; random, random effects model; SD, standard deviation; total, number of patients; weight, relative weight (%) of the study in the calculation.

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Häuser et al. Arthritis Research & Therapy 2010 12:R79   doi:10.1186/ar3002