Study design
Sample size — one proportion
How many participants are needed to estimate a single proportion to a stated precision, with optional finite population…
[Your full name], [MD, PhD]
[Your current position]
[Your institution]
[One or two sentences describing what you study and why it matters. This is the first thing a colleague reads.]
Portrait photograph
Add one in Settings
Research focus
What I work on
[Replace these with your own areas. Two to four is usually right — a longer list reads as unfocused.]
01
[First research area]
[A sentence or two on what you study in this area and why it matters. Be specific: a named condition, population or method says more than a broad field.]
02
[Second research area]
[A sentence or two. If this area connects to the first, say how.]
03
[Third research area]
[A sentence or two.]
Selected publications
No publications have been added yet. Add them in Admin → Publications.
Open resources
Research tools
Free calculators for the statistics that come up most often in clinical research. Each states its formula, assumptions and references.
Study design
Sample size — two proportions
How many participants per group are needed to detect a difference between two independent proportions at a given signif…
Estimation
Confidence interval
Wilson score and Wald intervals for an observed proportion, showing why the two disagree near zero and one.
Epidemiology
2 × 2 table
Odds ratio, risk ratio, risk difference, absolute risk reduction and number needed to treat, each with a confidence int…
Diagnostics
Diagnostic accuracy
Sensitivity, specificity, predictive values and likelihood ratios, with predictive values projected onto any prevalence…
Effect size
Cohen's d
Standardised mean difference between two independent groups, with Hedges' small-sample correction and a confidence inte…
KIMRA
The academy
The Khalifa International Medical Research Academy trains a small number of early-career researchers each year. It is a mentorship, not a course: participants bring a question they genuinely want to answer, and work it through to a manuscript with supervision at every stage.
Places are limited by how many people one supervisor can properly support.
- Small cohorts, selected by application
- One project, carried from question to submission
- Written feedback on every piece of work
Contact
Get in touch
For collaborations, speaking invitations, or questions about the academy.
I read every message, though a reply may take a week during term.