19 Questions 57 Answers 0 Followers
Questions related from Fahmi Khan
I have already conducted a study, however, after publication of this study, new question comes to my mind, can I do secondary analysis of this data to answer my new question?
11 November 2017 8,562 4 View
I want to do secondary data analysis of my previous study; Is it important to get ethical approval for secondary data analysis?
11 November 2017 8,839 11 View
I would like to conduct a clinical trial to do a head to head comparison between two drugs for safety and efficacy. How can I estimate the appropriate sample size?
10 October 2017 5,212 10 View
I have been asked this question by my colleagues (residents and physicians) several times. I would like to transmit this question to the experts like you to help them to get the appropriate answer.
03 March 2016 5,109 5 View
The measures of association, such as relative risk and odds ratio, reflect the strength of the relationship between an exposure and a disease. What’s the difference?
01 January 2014 2,929 9 View
Does the assessment of published article depend on the journal impact factor or on the content of the manuscript?
05 May 2013 3,022 11 View
Linear regression and correlation play an important part in the interpretation of quantitative method comparison studies. How to use linear regression and correlation in quantitative method...
05 May 2013 8,849 1 View
Researchers tend to have varying needs for statistical software to perform data analysis and as the market has much statistical software. It is difficult to choose the statistical program. Which...
05 May 2013 8,362 21 View
Regression test is an important test that has been used extensively in data analysis.Can anybody tell me the differences between logistic regression test and linear regression test? When would we...
05 May 2013 6,850 9 View
A patient with deep vein thrombosis under oral anticoagulants and INR of 2.9 wants to travel. How soon can he fly after a DVT?
05 May 2013 633 13 View
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05 May 2013 4,481 10 View
From ethical point of view, Is it necessary to have consent when conducting a retrospective study?
04 April 2013 6,727 39 View
Is it necessary to test the questionnaire before starting the study? and how to do this?
03 March 2013 889 24 View
I am conducting a descriptive study on patients with liver transplantation. My mentor asks me to do survival analysis. What is survival analysis? And what are the statistical methods to estimate...
02 February 2013 6,362 15 View
While I am doing a multivariate analysis, one variable showed odds ratio of 4.2 and P value off 0.01. How should I interpret this result?
02 February 2013 4,389 28 View
If we conducted a control study without determining the sample size and power of study, is it possible to calculate the power of study at the end (after data collection is completed)?
02 February 2013 5,510 40 View
To perform a test of significance between means of two groups is well known. But if I use the medians is it possible to test for significance between medians of two groups?
02 February 2013 7,222 33 View
We are want to conduct a study to identify the risk factors for developing ventilator associated pneumonia in our intensive care unit. After identifying the control group, which test is suitable...
02 February 2013 2,706 15 View
11 November 2012 9,042 1 View
