RT Journal Article SR Electronic T1 Clinical accuracy of infrared temperature measurement devices: a comparison against non-invasive core-body temperature JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 157 OP 163 DO 10.7861/clinmed.2022-0252 VO 23 IS 2 A1 Thomas Holder A1 Frances Sophie Woodley Hooper A1 David Yates A1 Zion Tse A1 Samadhan Patil A1 Ahmed Moussa A1 Lucy Batten A1 Vignesh Radhakrishnan A1 Mark Allison A1 Catherine Hewitt A1 Ada Keding A1 Greg Forshaw A1 Vijay Jayagopal YR 2023 UL http://www.rcpjournals.org/content/23/2/157.abstract AB During the coronavirus 2019 (COVID-19) pandemic, the implementation of non-contact infrared thermometry (NCIT) became an increasingly popular method of screening body temperature. However, data on the accuracy of these devices and the standardisation of their use are limited. In the current study, the body temperature of non-febrile volunteers was measured using infrared (IR) thermography, IR tympanic thermometry and IR gun thermometry at different facial feature locations and distances and compared with SpotOn core-body temperature. Poor agreement was found between all IR devices and SpotOn measurements (intra-class correlation coefficient <0.8). Bland–Alman analysis showed the narrowest limits of agreement with the IR gun at 3 cm from the forehead (bias = 0.19°C, limits of agreement (LOA): −0.58°C to 0.97°C) and widest with the IR gun at the nose (bias = 1.40°C, LOA: −1.15°C to 3.94°C). Thus, our findings challenge the established use of IR thermometry devices within hospital settings without adequate standard operating procedures to reduce operator error.