Victor C. Kok

13 Questions 48 Answers 0 Followers

Questions related from Victor C. Kok

Is there any (validated or not yet) evaluation form available for formally assessing the causal relationship in a treatment-emergent mortality?

Is there any (validated or not yet) evaluation form available for formally assessing the causal relationship between a complex treatment and a subsequent treatment-emergent (or hopefully not)...

06 June 2018 7,658 0 View

Circulating tumor DNA (ctDNA) has a very short half-life in peripheral blood, approximately 1.5 to 2 hours only. How will the ctDNA disappear?

According to the previous decent studies, the half-life of ctDNA has been determined to be less than 2 hours. What are the physiological mechanisms to clean-up these ctDNAs in one's peripheral blood?

12 December 2016 8,944 6 View

Why EMBASE literature database is such unfriendly and not accessible?

I'm so frustrated in accessing EMBASE for scientific research. High expense and poor accessiblity. I don't know how and why the EMBASE leads me into this negative impression?

09 September 2015 7,586 0 View

Any caveats that should be kept in mind beforehand while using the Jointpoint regression model to calculate the trends of certain cancer occurrence?

02 February 2015 2,591 0 View

How can I determine the caliper in a propensity score matching?

A caliper which means the maximum tolerated difference between matched subjects in a "non-perfect" matching intention is frequently set at 0.2 standard deviation as the default such as used in the...

01 January 2015 9,192 4 View

Which type of cancer or solid tumors are strongly associated with CTLA4 aberration causing a state of self-tolerance?

Cytotoxic T-cell antigen-4 gene variants in cancer.

11 November 2014 3,440 3 View

When there are two editors-in-chief, how shall one address them in the Cover Letter?

Shall we just pick one of them to address to? This will not be polite enough, right? But how to write a letter to two persons? Pardon me for this naive question, please.

10 October 2014 8,729 4 View

How to calculate the synergy Index when the measure of risk is hazard ratio?

SAB=(RRAB - 1)/(RRA + RRB - 2)

08 August 2014 9,676 4 View

Is it possible or helpful to establish a ResearchGate Repository collecting all the uploaded full-text articles?

Full-text articles uploaded by ResearchGate researchers are valuable. A repository of these articles can provide better utilization, more efficiently shared amongst us, when the repository...

07 July 2014 9,553 0 View

Can we score (quantitatively evaluate) an observational cohort study using the STROBE checklist?

The Strengthening the Reporting of Observational Studies in Epidemiology (STROBE)statement: guidelines for reporting observational studies.

07 July 2014 5,497 6 View

Which bio-statistical software is particularly good for propensity score matching?

In an administrative database research using retrospective cohort study design, the propensity score matching may be adopted to ensure group A and group B in the cohort will look similar...

06 June 2014 4,992 10 View

SIR versus IRR, which one of them provides higher level of evidence?

Standardized incidence ratio (SIR) uses a general community as the reference population, whereas incidence rate ratio (IRR) uses comparator control group in a cohort study as a reference...

10 October 2013 2,274 1 View

Are there particular clinical questions that shall be better answered using a nested case-control study design?

E.g., using large administrative database as source of data.

04 April 2013 2,302 0 View