Tulder, M.W. van

study patient treatment effect outcome review trial intervention nsaid group difference therapy quality signi month exercise spine follow-up result evidence ficant pain intensity cochrane placebo signi ficant differences randomized disability criteria copyright © 2011 outcome measures comparison side effects injection author cochrane collaboration sciatica score signi ficant difference reference surgery intensity analysis john wiley randomization health measure exercise therapy judgement allocation concealment baseline allocation number participant method control procedure inclusion criteria pain relief flammatory identi fied anti-in signi ficantly status bene fits description exclusion criteria judgement effect size collaboration patients description intervention description guideline non-steroidal copyright research ef ficacy post-treatment population speci risk randomization procedure effectiveness