Sample sizes for rare diseases/events?

I want to compare the mortality of cases versus controls for a cohort of patients with a complication of a viral illness. We have just been notified that we have only 5 case fatalities in our...

01 February 2019 5,191 1 View

Funding opportunities to conduct research in the Netherlands?

Hello everyone, I have had preliminary acceptance from a principal investigator for me to join a Master's degree program in Epidemiology, as a first step towards joining a PhD program in a...

09 October 2017 7,517 0 View

Double checking multiple logistic regression results ?

03 April 2017 7,949 2 View

Can we exclude variable groups of very small counts?

I have a potential problem that I may have to answer for within one of my working research projects. I have a variable that I am studying its effect on mortality of cancer patients. This variable...

02 March 2017 4,512 4 View

Are there any opportunities out there for a 40+ year old researcher to apply for PhD in biological sciences?

I am a 40 year old hematologist from Egypt. After spending about 10 years in study and practice, I am beginning to see more meaning and value in basic or clinical research. I started applying for...

10 November 2016 4,946 2 View

Interpretation of Standardized Incidence Ratios (SIR) and Absolute Excess Risks (AER) of developing a second primary cancer

Dear friends, I am conducting a research study about the probability of developing second primary cancers after the diagnosis of a certain index cancer. My primary outcomes are the Standardized...

01 January 1970 4,561 4 View

Is lower torso stage I/II Hodgkin lymphoma excluded by radiotherapists of the German Hodgkin Study Group (GHSG)?

Excuse me. If any of you is following the German Hodgkin Study Group (GHSG) research work, I would really appreciate it if you can confirm or deny the following statement. "In recent trials of...

01 January 1970 2,348 4 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

How can the use of Jolly Phonics improves the quality of reading, speaking and writing in rural disadvantaged communities in Papua New Guinea?

Jolly Phonics reading program is an effective way to teach early reading to young learners. How can lectures at the university prepare early childhood student teachers to teach Jolly Phonics to...

03 March 2021 3,731 3 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

How to calculate average trend in maximum annual NDVI from MODIS?

I am wanting to calculate the average trend in maximum annual NDVI in Iceland from 2010-2020 using MODIS MYD13Q1 V6. How would I do this? I have currently inserted the NDVI bands from the MODIS...

02 March 2021 752 2 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

No title

01 March 2021 3,905 5 View

What test should I use to compare two or three means, if data is not normally distributed but sample size is > 30 in each group?

I personally feel this as a most confusing question. As per my understanding, if sample size is > 30, and sample is skewed, we can still use paramteric approach, as it will follow Z...

01 March 2021 1,587 6 View

Is it necessary to report effect size (ES) in statistics of biomedical research given that we already report p values routinely?

Pls share your thoughts

01 March 2021 7,330 4 View

How can I make stacked bar graph with scatter plot?

I want to make a stacked bar graph with showing each data value as dots. I tried with graph pad prism, version 6, but could not succeed. Does anyone have tried before making such graphs?

01 March 2021 9,383 1 View

How to perform statistical analysis of coefficients extracted from transform techniques?

I am studying the potential of DCT and FFT coefficients extracted from a signal to classify the different objects that emit the signal. I applied the Shapiro-Wilk to confirm that data was not...

01 March 2021 8,079 2 View