Student’s t-test and one-way analysis of variance were used to
compare mean difference between-group of the multisite MSP. The
simple association of dependent and independent variables was
investigated using Pearson’s moment correlation coefficient. Also,
the association between pains in each pair of anatomical sites was
assessed by binary logistic regression models. In each model, one of
the pain sites was considered as dependent variables while the
other sites were taken as independent by controlling age.
A p value < 0.05 was taken to be significant. Statistical analysis
was carried out with STATA/SE version 10 (Stata Crop LP, College
Station, Texas 77845, USA) and SPSS version 18 (SPSS Inc., Chicago,
IL, USA) software.