Jan 24: Assignment 2 Questions

1. On page 524, "Statistical analysis" section: What do the authors mean by "The equivalence range was 11.8-57.9%"?

2. On page 524, "Patients" section, last paragraph: Why do the authors test for mean age difference between groups? Are there even "true means" here to compare?

3. On page 524, "Efficacy and long-term follow-up" section: The authors found that "pain" had significantly reduced within each group after treatment. Is this due to regression towards the mean? How can we tell?

VincenzoCoia (talk)‎

1. In page 526 (efficacy), the real and the sham acupuncture groups are statistically insignificant for a number of pain parameters just by seeing the graphs (fig 2, 3 and 4) without by using any statistical inference ? It is not clear for me and how is it possible ?

2. In page 524, the author used an unpublished pilot trial to determine the sample size for his study and he don't specify how long ago the pilot study has done. Is the pilot trial valid ?

MdMahsin (talk)‎