There were no differences between groups at baseline
in the mean scores (normalized) from the Physical Component
Summary (PCS) or the Mental Component Summary
(MCS) of the SF-36 questionnaire. However, after
24 weeks, the Intervention Group’s PCS scores were significantly
higher while the MCS scores were significantly
lower than the Reference Group’s scores. Scores on the
other sub-scales of the Health and Productivity survey
were not significantly different between groups (not
shown). Both Groups reported lower scores at the end of
the study on the Output Work Demands and the WLQ
Index of the WLQ-Short Form survey, but there were no
significant differences between the groups. Finally, no
significant difference in absentee days, total lost days or
accidents and injuries were found (not shown).