13 Questions 27 Answers 0 Followers
Questions related from Ehab Mudher Mikhael
I want to know the sample size (with online calculator) for my study with one group pre-post study design. The proportion for expected improvement after the study is 40%.
11 November 2021 4,479 4 View
What is the possible diagnosis and management for the following case? Healthy male 43 years old, infected with corona virus ... had 4 days of fever (38-39.5) with fatigue and sore throat for 1...
07 November 2020 4,761 25 View
I did a clinical trial for 2 groups (30 Type 2 DM patients in each group), and after I complete the study I did 2*3 (2groups and with 3 continuous measures: at baseline, after 3 months and after 6...
14 August 2020 4,963 4 View
What is the acceptable values for multiple linear regression assumptions including R square Adjusted R square Standard error of estimate Linear correlation between dependent and independent...
15 July 2020 586 4 View
I did and educational intervention to type 2 DM (clinical trial for 60 patients, 30 in intervention arm and 30 in control arm) I want to do regression analysis to a dependent variable, improvement...
28 May 2020 6,020 21 View
Does stratified randomization for diabetic patients based on HbA1c values (above 7 and less than 7%) mean that we will enroll one patient with uncontrolled hyperglycemia in the control group and...
22 October 2019 7,051 3 View
Can a researcher get higher than the desired sample size in one arm of the study? Example if the sample size is 60 patients (30 in each arm) and one assumes 30% loss to follow up with a total of...
10 October 2019 2,299 5 View
can we calculate sample size in clinical trials based on history by using the mean data (mean improvement and mean SD) for a number of studies ? or it must be obtained from one study? Please if...
08 October 2019 7,735 1 View
If previous studies showed a reduction of 0.71% in Hba1c (SD = 0.55) in inetrvention group and 0.25% (SD=0.47) in control group what will be the required sample size for this study to achieve 0.05...
25 July 2018 9,067 14 View
How to calculate sample size if the study is proposed to be done in multiple phases, phase 1 qualitative study, phase 2 cross sectional study and phase 3 clinical trial? can we take 1 sample size...
07 August 2017 2,108 5 View
Is there any formula or calculator for measuring sample size in rare disease? especially if the researcher work in a medical center for this rare disease with nearly half of country cases
12 April 2017 6,566 17 View
Is there any encouragement for the patient to participate in the decision making process about his/her treatment? Do physicians act in a faith of concordance with their patients?
19 March 2015 6,407 5 View
Any comparative studies between warfarin and the new anticoagulants
18 December 2014 6,245 28 View
