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?

10 November 2017 8,493 4 View

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?

10 November 2017 8,631 11 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?

09 October 2017 5,154 10 View

What are the minimum skill requirements needed for a person (student or physician) to become a researcher?

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.

02 March 2016 5,049 5 View

No title

31 December 2013 2,860 9 View

Can anybody tell me the differences between logistic regression test and linear regression test? When would we use each?

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...

04 May 2013 6,790 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?

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?

04 May 2013 516 13 View

Which is the best statistical program for data analysis SPSS or SAS?

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...

04 May 2013 8,294 21 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?

...

04 May 2013 4,409 10 View

What is the significance of publishing a manuscript in a journal with high impact factor?

Does the assessment of published article depend on the journal impact factor or on the content of the manuscript?

04 May 2013 2,955 11 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

Sample dilution for quantitative analysis using ELISA?

If the detection range is in ng/ml but the reference range is in ug/ml for a molecule or protein in serum or plasma .how to dilute and what is the initial volume to be taken for quantitative analysis

02 March 2021 7,670 3 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View