Fahmi Khan

22 Questions 53 Answers 0 Followers

Questions related from Fahmi Khan

Is it important to get ethical approval for secondary data analysis?

I want to do secondary data analysis of my previous study; Is it important to get ethical approval for secondary data analysis?

08 November 2017 1,555 10 View

Can I do secondary post hoc analysis of previous study?

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?

03 November 2017 4,656 2 View

What is the appropriate sample size for this clinical trial?

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?

26 October 2017 9,449 9 View

What is best research design to compare two diagnostic modalities, the gold standard is the surgical finding?

I want to compare the accuracy of two diagnostic modalities, which research design is appropriate to accomplish this task?

23 October 2017 2,521 4 View

How soon after an uncomplicated ischemic stroke may a patient undertake air travel safely?

A 65-year-old male patient presents with right sided weakness of one day duration. He is diabetic on oral hypoglycemic agents. On examination, his BP is 150/90 mm Hg; pulse 104/minute and his...

28 June 2016 1,392 6 View

Can P. vivax cause severe malaria?

The lack of a “gold standard” definition for severe malaria has been a longstanding problem for both clinicians and researchers. According to the CDC, severe malaria occurs when P. falciparum...

27 May 2013 702 29 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?

27 May 2013 8,625 9 View

What is the importance of journal clubs for junior doctors and medical students?

What is the importance of journal clubs for junior doctors and medical students? Is it really bridging the gap between medical education and clinical practice?

17 May 2013 2,796 9 View

Is it possible to conduct studies without getting ethical approval in countries, which have no ethical committees or institutions?

Getting ethical approval is essential to conduct a study in any society. Thus establishing ethical committees or institutions are mandatory to approve proposals and to monitor the research...

16 May 2013 2,606 5 View

Can we start anticoagulants in a patient with pulmonary embolism who has massive hemoptysis? If the answer is no, how would we manage this patient?

...

16 May 2013 8,996 10 View

Does accepting gifts from the pharmaceutical industry affect trust in physicians? Is this behavior ethical?

Some studies showed that accepting gifts from the pharmaceutical industry by physicians has implications for the doctor-patient relationship as it affects patients’ intent to adhere to medical...

10 May 2013 5,602 7 View

How to use linear regression and correlation in quantitative method comparison studies?

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...

09 May 2013 5,071 1 View

Do you favor the trend toward health care for profit?

Medicine is essentially a humanitarian profession. Those favoring the trend toward health care for profit claim that an increased role for entrepreneurs and competition in the delivery of health...

09 May 2013 5,746 12 View

Is it necessary to test the questionnaire before starting the study?

Is it necessary to test the questionnaire before starting the study? and how to do this?

01 March 2013 827 28 View

Can patients with liver cirrhosis, who already have a prolonged INR, receive warfarin therapy if needed?

I have a female patient with decompensated liver cirrhosis attributed to hepatitis C virus; presented with right leg deep vein thrombosis including popliteal and iliac veins, her INR was 1.4. Can...

19 February 2013 8,056 12 View

What is the minimum sample size, regardless of total number of population, that can be considered as reliable for performing advanced statistical tests?

I have 32 patients with tuberculous meningitis, if I determined the sensitivity and specificity of cerebrospinal fluid adenosine deaminase and I got significant results, does it mean the result...

11 February 2013 848 23 View

Which statistical test is appropriate to study the risk factor of a disease?

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...

06 February 2013 5,918 15 View

While doing univariate and multivariate analysis, which is more reliable, Odds ratio or P value?

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?

05 February 2013 4,859 27 View

Is it possible to calculate the power of study retrospectively?

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)?

05 February 2013 1,837 46 View

How would you manage a patient with metallic aortic valve and under warfarin who presented with dense left sided hemiplegia?

I have a 65-year-old female with metallic aortic valve on warfarin, presented with dense left sided hemiplegia. Brain CT showed massive right hemisphere infarction. The patient admitted to the...

05 February 2013 3,816 7 View

What is non-resolving pneumonia? And how would you manage this condition?

A 72-year-old male, presented with cough and fever of 20-day duration. Clinical examination of the chest revealed bronchial breathing in the right middle zone. Chest x-ray showed a patchy opacity...

19 January 2013 8,603 1 View

Can anybody tell me the differences between a Case Series Study and Cohort Study?

I am confused about the new term 'case series'.

21 May 2012 4,274 47 View