Santos et al. BMC Public Health 2011, 11:60 http://www.biomedcentral.com/1471-2458/11/60 Page 7 of 7 50 g inn 0 o i t c n u F l a isc -50 y h P f o n o i t ia -100 r a V -150 30 40 50 60 Baseline Physical Funcioning 70 80 90 100 Figure 2 Correlation between baseline physical functioning score of SF-36 and variation of this score between baseline and week 26 (n = 75, rS = -0.393, p < 0.001). improvements in some aspects of quality of life, suggest- ing that educational interventions improve workers’ health conditions. Further studies are necessary to deter- minate the value of education on long term outcomes and in populations at higher risk of WMSD. Authors’ contributions ACS was the principal investigator, and participated in the protocol development, study design, conduct of the study, analysis of the data, writing up and revision of drafts of the manuscript. KFR participated in the program conducted for the control group, and VAA participated in data organization. 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