A total of 146 participants with low back pain were enrolled…

A total of 146 participants with low back pain were enrolled in a study. Participants were divided into two groups: the back-school group received exercise, physical treatment modalities and a back school program; and the control group received exercise and physical therapy modalities. They were evaluated on the numeric pain rating scale (NPRS, scoring 0-10; 0 representing “no pain” and 10 “worst pain ever”) and the difference scores of post-treatment minus pre-treatment were compared between groups. Which statistics did the researchers use? 

Based on the study in question 6, the physical therapists ar…

Based on the study in question 6, the physical therapists are also interested whether these patients seeking physical therapy treatment would also likely seek “complementary or alternative medical treatment”, in other words, whether there is an association between these two variables and how strong the association is. Which statistic should the therapists use?