Comparative accuracy testing of non-contact infrared thermometers and temporal artery thermometers in an adult hospital setting

Khan, Dr Shahrukh; Saultry, Ms Bridey; Adams, Dr Scott; Kouzani, Dr Abbas Z.; Decker, Ms Kelly; Digby, Dr Robin; Bucknall, Alfred Deakin Professor Tracey

BACKGROUND: NCIT are non-invasive devices for fever screening in children. However, evidence of their accuracy for fever screening in adults is lacking. This study aimed to compare the accuracy of non-contact infrared thermometers (NCIT) with temporal artery thermometers (TAT) in an adult hospital. METHODS: A prospective observational study was conducted on a convenience sample of non-infectious inpatients in two Australian hospitals. NCIT and TAT devices were used to collect body temperature recordings. Participant characteristics included age, gender, skin colour, highest temperature and antipyretic medications recorded in last 24-hours. RESULTS: In 265 patients, a mean difference of ±0.26°C was recorded between the NCIT (36.64°C) and the reference TAT (36.90°C) temperature devices. Bland-Altman analysis showed that NCIT and TAT temperatures were closely aligned at temperatures <37.5°C, but not at temperatures >37.5°C. NCIT had low sensitivity (16.13%) at temperatures ≥37.5°C. An AUROC score of 0.67 (SD 0.05) demonstrated poor accuracy of the NCIT device at temperatures ≥37.5°C. CONCLUSION: This is the first study to compare accuracy of NCIT thermometers to TAT in adult patients. Although mass fever screening is currently underway using NCIT, these results indicate that the NCIT may not be the most accurate device for fever mass screening during a pandemic.