How big is the effect of spinal manipulation on the pressure pain threshold and for how long does it last? – secondary analysis of data from a systematic review

ConclusionAuthors need to revise their approach to ‘effect size’. Our calculations showed that the effect-size of SM on PPT may go from ‘medium’ to ‘large’ within the first five minutes but appears to diminish again within ten minutes. Research of this type should collect information for longer periods and compare results to other interv entions to put results into perspective.
Source: Chiropractic and Manual Therapies - Category: Complementary Medicine Source Type: research