Epidemiology Archives • LITFL https://litfl.com/category/medical-specialty/epidemiology/ Emergency medicine education and critical care education blog Mon, 20 Apr 2026 06:37:03 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 https://litfl.com/wp-content/uploads/2018/08/cropped-LITFL-Logo-Square-516-TR-100x100.png Epidemiology Archives • LITFL https://litfl.com/category/medical-specialty/epidemiology/ 32 32 124409178 John Snow https://litfl.com/john-snow/ https://litfl.com/john-snow/#respond Sun, 15 Mar 2026 11:57:00 +0000 https://litfl.com/?p=191336 Mike Cadogan John Snow

John Snow (1813-1858), English physician. Pioneer of anaesthesia and epidemiology. Defined etherization stages and traced cholera outbreaks to contaminated water in London.

]]> https://litfl.com/john-snow/feed/ 0 191336 Medmastery: PPV and Specificity https://litfl.com/medmastery-ppv-specificity/ https://litfl.com/medmastery-ppv-specificity/#respond Mon, 19 Sep 2022 06:36:00 +0000 https://litfl.com/?p=193962 Franz Wiesbauer Medmastery: PPV and Specificity

Franz Wiesbauer looks at the impact of specificity and sensitivity on positive predictive value (and thus validity of a test) and why one has a bigger impact than the other.

]]> https://litfl.com/medmastery-ppv-specificity/feed/ 0 193962 Medmastery: Mortality rate https://litfl.com/medmastery-mortality-rate/ https://litfl.com/medmastery-mortality-rate/#respond Mon, 12 Sep 2022 06:06:00 +0000 https://litfl.com/?p=193957 Franz Wiesbauer Medmastery: Mortality rate

Franz Weisbauer explains how to calculate mortality rates for various subgroups, proportionate mortality, and why proportionate mortality is not a measure of risk.

]]> https://litfl.com/medmastery-mortality-rate/feed/ 0 193957 Benjamin Babington https://litfl.com/benjamin-babington/ https://litfl.com/benjamin-babington/#respond Tue, 02 Aug 2022 10:14:00 +0000 https://litfl.com/?p=257643 Rowan Lo and Mike Cadogan Benjamin Babington

Benjamin Guy Babington (1794-1866) was an English physician and epidemiologist. Inventor of the laryngoscope in 1829

]]> https://litfl.com/benjamin-babington/feed/ 0 257643 John Alfred Ryle https://litfl.com/john-alfred-ryle/ https://litfl.com/john-alfred-ryle/#respond Sat, 05 Mar 2022 14:07:00 +0000 https://litfl.com/?p=194749 Samuel McCarney and Mike Cadogan John Alfred Ryle

John Alfred Ryle (1889–1950) was an English physician and epidemiologist. Coined the phrase angor animi; and the Ryle nasogastric tube bears his name

]]> https://litfl.com/john-alfred-ryle/feed/ 0 194749 Denis Burkitt https://litfl.com/denis-burkitt/ https://litfl.com/denis-burkitt/#comments Sat, 01 Feb 2020 09:17:20 +0000 https://litfl.com/?p=221144 Fergus Jones and Mike Cadogan Denis Burkitt

Denis Parsons Burkitt (1911 - 1993) was an Irish surgeon. Burkitt lymphoma (1958)

]]> https://litfl.com/denis-burkitt/feed/ 2 221144 Medmastery: prognosis and life tables https://litfl.com/medmastery-prognosis-and-life-tables/ https://litfl.com/medmastery-prognosis-and-life-tables/#respond Thu, 26 Sep 2019 14:11:19 +0000 https://litfl.com/?p=193964 Franz Wiesbauer Medmastery: prognosis and life tables

Franz Wiesbauer explains how to express prognosis with the help of life tables and why this is essential to understanding Kaplan Meier curves.

]]> https://litfl.com/medmastery-prognosis-and-life-tables/feed/ 0 193964 Medmastery: PPV and prevalence https://litfl.com/medmastery-ppv-and-prevalence/ https://litfl.com/medmastery-ppv-and-prevalence/#respond Sun, 22 Sep 2019 14:06:32 +0000 https://litfl.com/?p=193963 Franz Wiesbauer Medmastery: PPV and prevalence

Franz Wiesbauer looks at how a doctor can work out the probability of disease when confronted with a positive or a negative test result and how the prevalence of a given disease affects this probability.

]]> https://litfl.com/medmastery-ppv-and-prevalence/feed/ 0 193963 Just Read the Map https://litfl.com/just-read-the-map/ https://litfl.com/just-read-the-map/#respond Sun, 18 Aug 2019 06:23:38 +0000 https://litfl.com/?p=197851 Chris Nickson Just Read the Map

John Snow (1813-1858) was one of the first anaesthetists – he even chloroformed Queen Victoria! – but today he is famous for his investigation of the 1854 Broad Street cholera outbreak in Soho, London. By mapping the cases of cholera he was able to link transmission of the illness to contaminated water consumed from the […]

]]> https://litfl.com/just-read-the-map/feed/ 0 197851 Investigative Epidemiology https://litfl.com/investigative-epidemiology/ https://litfl.com/investigative-epidemiology/#respond Wed, 20 Feb 2019 02:10:50 +0000 https://litfl.com/?p=196078 Neil Long Investigative Epidemiology

Putting your head above the parapet Part of the joys of studying at the Liverpool Tropical School of Medicine is the weekly Wednesday lunchtime lectures. This week we were treated to investigative journalist Deborah Cohen (@deb-cohen), an award winning medically qualified TV, print and radio reporter, as well as being an editor on the British […]

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