04 April 2017 1 7K Report

Is it possible to calculate sample size for non-inferiority/superiority tests using the G*Power software?

More Ali Gholamrezaei's questions See All
How to estimate nares to LES distance from demographic measures in adults?

There are some formula for estimating nares to lower esophageal sphincter distance in infants based on height. I'm looking for some data in adults to estimate such distance based on gender and...

31 December 2017 1,410 5 View

What band-pass filter is appropriate for continous blood pressure wave analysis?

We use the analogue output of the Portapres device for monitoring continuous blood pressure. Is band-pass filtering necessary for such blood pressure wave analysis? What should be the low/high...

10 November 2016 10,067 15 View

What does it mean when, in the repeated measure analysis, the time x group interaction is significant but between-subject contrast is not significant?

In the repeated measure analysis of the the effect of drug A compared with drug B on the variable C which was measured at times 0, week 2, and week 6, the results were as follows: Test of...

31 December 2014 7,708 13 View

What could be the mechanisms for vitamin D deficiency associated with radiation-induced intestinal injury ?

In a prospective study on patients with pelvic malignancies undergoing pelvic radiotherapy, we found an association between vitamin D deficiency and severity of radiation induced proctitis. This...

11 December 2014 1,647 8 View

What are the Pros and Cons of measuring 1,25(OH)2D in contrast to 25(OH)D to investigate the immunomodulatory effects of vitamin D?

We are going to evaluate the immunomodulatory effects of vitamin D in an intestinal mucosal injury model. What are the Pros and Cons of measuring 1,25(OH)2D in contrast to 25(OH)D for this...

10 November 2014 7,497 7 View

Can anyone recommend a good questionnaire for evaluating coping in cancer patients?

We are looking for a questionnaire to evaluate coping in cancer patients. We look for an instrument designed specifically for cancer patients.

02 March 2014 3,269 3 View

As independent factors, should anxiety and depression be included in a linear regression model separately or simultaneously?

In studying factors associated with sleep in patients with chronic medical conditions we found an association between different factors including anxiety and depression with sleep quality. To...

31 December 2013 7,510 33 View

What is the minimum acceptable item-total correlation in a multi-dimensional questionnaire?

In linguistic validation of some multi-dimensional questionnaires for our population (with 26 to 34 items and about 5 sub-scales), we encountered some questions: What are the minimum acceptable...

10 November 2013 6,233 28 View

Association of BMI and treatment response in rheumatoid arthritis - can anyone help?

Recently we have conducted a prospective study to evaluate if BMI is associated with treatment response to a combination DEMARDs therapy. We found an inverse association between BMI and disease...

09 October 2013 921 14 View

Is there any method for real-time in-situ measurement of the amount of released cytokines from immune cells?

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07 August 2013 2,897 4 View

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