Kleijnen Systematic Reviews (KSR) Ltd is an independent research company that prepares systematic reviews, meta-analyses, and clinical guidelines.

We pride ourselves in consistently delivering reviews of excellent quality to support and inform healthcare decisions. This was first acknowledged by the National Institute for Health Research (NIHR) in 2011 when it declared KSR Ltd a “Centre of Excellence” for Technology Assessment Reviews (TARs), a coveted title which we have held for over a decade – the only commercial company in the UK to do so.

At KSR we work for a variety of commissioners that include governmental and other publicly funded bodies, health insurance associations, pharmaceutical companies and organisations that deliver health services. We have been awarded three subsequent five-year contracts from NIHR to provide TARs for the National Institute for Health and Care Excellence (NICE) since 2011, with our current contract running from 2022 to 2027.

Committed to high-quality independent research since 2005

We could not have achieved our level of success without our highly skilled team of systematic reviewers, information specialists, health economists and administrators, who share a passion for what they do and are all dedicated to deliver the high-quality work KSR is renowned for.

Meet the Team

Our history

Kleijnen Systematic Reviews KSR Independent research company systematic reviews analyses health technology assessments

2022

KSR becomes an Employee Owned Trust (EOT)

Robert Wolff - Kleijnen Systematic Reviews KSR Independent research company

2021

Robert Wolff is appointed Managing Director

Kleijnen Systematic Reviews KSR Independent research company systematic reviews analyses health technology assessments

2020

KSR awarded a third five-year contract with NIHR

Kleijnen Systematic Reviews KSR Independent research company systematic reviews analyses health technology assessments

2017

Launch of KSR Evidence at the Global Evidence Summit in Cape Town

Kleijnen Systematic Reviews KSR Independent research company systematic reviews analyses health technology assessments

2011

NIHR acknowledges KSR as a "Centre of Excellence" for TARs

Kleijnen Systematic Reviews KSR Independent research company systematic reviews analyses health technology assessments

2010

KSR moves its offices to Escrick

Jos Kleijnen - Kleijnen Systematic Reviews KSR Independent research company

2005

KSR Ltd is established by founder Professor Jos Kleijnen