Resources >‏ News >‏ News Details

News Details

QCRI’s Rayyan app a hit with foreign users

Publication Date:
Hossam Hammady and Dr Mourad Ouzzani.jpg
Rayyan, a data analytics system developed by the Qatar Computing Research Institute (QCRI) to automate systematic reviews, has now attracted 1,000 users from 50 countries mostly in Europe.

The system, first launched in September 2014, is being used by medical professionals, researchers, and public health officers to support evidence-based medicine and decide health guidelines.

A systematic review is a literature review that identifies, appraises, selects and synthesizes relevant evidence related to a research question. The kinds of health-related questions asked in systematic reviews have included whether high egg consumption is associated with the increased risk of coronary heart disease; whether evidence supports low-fat dietary recommendations or whether influenza medicines alleviate symptoms.

Rayyan identifies relevant evidence, selects studies for inclusion, assesses the quality of each study and interprets the findings in an unbiased way.

Rayyan’s lead scientist Mourad Ouzzani, who developed the system with Hossam Hammady, said as the amount of medical research exploded to 1.8 million articles in 20,000 journals per year, typical systematic reviews were taking researchers up to two years of work.

Ouzzani said it was becoming almost impossible for clinicians to keep up with the amount of research without using data analytics, particularly as much research was becoming quickly outdated.  A recent survey of Rayyan’s users found the aggregated time saving for respondents was around 40 per cent.

“Rayyan is changing the way systematic reviews are produced and is dramatically reducing the time it takes for producing systematic reviews for a large number of users around the world,” Ouzzani said.

“It is responsive and quintessentially intuitive in use with significant potential to lighten the load of reviewers. By automating the production of systematic reviews, Rayyan is expediting the availability of current best evidence for policy and clinical decision-making.”

Testimonials from Rayyan’s users in the survey included: “It is a great feeling to work online and feel the burn. Some people like to job on their own … Rayyan is a bit like a jogging trainer.”

Another user said : “Can’t imagine a collaborative systematic review without Rayyan any more.”

Ouzzani said Rayyan’s success showed how basic research in data analytics, text mining and machine learning could be turned into a software product “with a proven impact on an important area related to public health, evidence-based medicine”.

Rayyan is available at


Follow Us

  • YouTube
  • Twitter
  • Facebook
  • RSS Feed
  • Linkedin
  • github-web.png
Back to Top

In the Media

Economist story pic.JPG

Improving disaster response efforts through data


Extreme weather events put the most vulnerable communities at high risk. How can data analytics strengthen early warning systems and and support relief efforts for communities in need? The size and ...

Read More

Yazan Wired story pic.jpg

Your sloppy bitcoin drug deals will haunt you for years


Perhaps you bought some illegal narcotics on the Silk Road half a decade ago, back when that digital black market for every contraband imaginable was still online and bustling. You might already ...

Read More

Luis Luque El Correo.jpg

Entrevista con Luis Fernández Luque, cofundador de Salumedia e investigador del Qatar Computing Research Institute


Si quiere buscar un ejemplo de ciudadano del mundo, de los que al cabo del año vive y trabaja desde numerosos países, y a través de internet, esté donde esté, desarrolla en remoto actividades para ...

Read More


Past Events


App Inventor.jpg

QCRI's Creative Space to hold free app inventor workshop

Download ICS File 01/02/2018 ,

QCRI is to offer an introduction to mobile app development workshop for boys and girls aged 13-16. Students will learn the basics of mobile app development using the App Inventor platform. The ...

Read More


after school pic.JPG

QCRI's Creative Space launches free after-school computing courses for teenagers

Download ICS File 01/11/2017  - 20/12/2017 ,

We offer an App Inventor Course in Arabic for students aged 13-15 and an Arduino Programming Course in English for students aged 14-18. Courses are free. Please register quickly as places are limited.

Read More

Summer Camp 2.jpg

QCRI conducts first summer computing camps for kids

Download ICS File 16/07/2017  - 27/07/2017 ,

Children and teenagers have been given a rare chance to develop their computing skills with world-class computing scientists at the first summer computing camp conducted by the Qatar Computing ...

Read More


bioinformatics cancer pic.jpg

QCRI scientists develop algorithm to detect brain cancer markers


Scientists from the Qatar Computing Research Institute have developed a new algorithm that can identify driver genes of several types of gliomas, the most common and aggressive forms of primary brain...

Read More

Jim Jansen pic preferred.jpg

Research by QCRI's Jim Jansen among most influential of decade: top journals


QCRI Social Computing group's principal scientist achieves rare honor.

Read More

yelena pic.JPG

#Halal now a lifestyle definition on Instagram


The word “halal” is no longer being defined only in a religious context but is becoming a lifestyle term associated with health and fashion around the globe, a new study of Instagram posts led by ...

Read More