{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,22]],"date-time":"2026-06-22T13:40:08Z","timestamp":1782135608245,"version":"3.54.5"},"reference-count":29,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2021,5,24]],"date-time":"2021-05-24T00:00:00Z","timestamp":1621814400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>At-home foot temperature monitoring may be useful in the early recognition of imminent foot ulcers that occur through biomechanical loading in people with diabetes. We assessed the concurrent validity, test\u2013retest reliability, and usability of a new plantar foot temperature monitoring device in 50 people with diabetes and peripheral neuropathy. We compared plantar foot temperature measurements with a platform system that consists of embedded temperature sensors with those from a handheld infrared thermometer that was used as a reference. Repeated platform assessments were compared for test\u2013retest reliability. Usability was assessed in 15 participants who used both devices daily for two weeks at home, after which they completed a questionnaire. Agreement between devices was excellent for the metatarsal heads and heel (ICCs \u2265 0.98, LOA: \u22120.89 \u00b0C; 1.16 \u00b0C) and hallux and lateral midfoot (0.93 \u2264 ICC \u2264 0.96, LOA: \u22122.87 \u00b0C; 2.2 \u00b0C), good for digits 2\u20135 (0.75 \u2264 ICC \u2264 0.88, LOA: \u22125.04 \u00b0C; 2.76 \u00b0C), and poor for the medial midfoot (ICC = 0.19, LOA: \u22128.21 \u00b0C; \u22120.05 \u00b0C). Test\u2013retest reliability was high (ICC = 0.99, LOA: \u22120.59 \u00b0C; 1.35 \u00b0C). Participants scored between 3.8 and 4.3 on a 5-point Likert scale for willingness to measure, ease of use, measurement comfort, and duration. In conclusion, the platform shows good concurrent validity in foot regions where most ulcers occur, good test\u2013retest reliability, and good usability for measuring plantar foot temperature. Further research should assess the clinical validity of the platform to help prevent plantar diabetic foot ulcers.<\/jats:p>","DOI":"10.3390\/s21113645","type":"journal-article","created":{"date-parts":[[2021,5,24]],"date-time":"2021-05-24T23:35:05Z","timestamp":1621899305000},"page":"3645","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["The Concurrent Validity, Test\u2013Retest Reliability and Usability of a New Foot Temperature Monitoring System for Persons with Diabetes at High Risk of Foot Ulceration"],"prefix":"10.3390","volume":"21","author":[{"given":"Tim","family":"Veneman","sequence":"first","affiliation":[{"name":"Department of Rehabilitation Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam Movement Sciences, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2128-8029","authenticated-orcid":false,"given":"Nicolaas C.","family":"Schaper","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Division of Endocrinology, Maastricht UMC, Maastricht University, P. Debyelaan 25, 6229 HX Maastricht, The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8357-9163","authenticated-orcid":false,"given":"Sicco A.","family":"Bus","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam Movement Sciences, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,5,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2367","DOI":"10.1056\/NEJMra1615439","article-title":"Diabetic foot ulcers and their recurrence","volume":"376","author":"Armstrong","year":"2017","journal-title":"N. Engl. J. Med."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"574","DOI":"10.1002\/dmrr.2319","article-title":"Predictive factors for diabetic foot ulceration: A systematic review","volume":"28","author":"Boyko","year":"2012","journal-title":"Diabetes Metab. Res. Rev."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"e3275","DOI":"10.1002\/dmrr.3275","article-title":"Effectiveness of offloading interventions to heal foot ulcers in persons with diabetes: A systematic review","volume":"36","author":"Lazzarini","year":"2020","journal-title":"Diabetes Metab. Res. Rev."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"513","DOI":"10.2337\/diacare.13.5.513","article-title":"Pathways to diabetic limb amputation: Basis for prevention","volume":"13","author":"Pecoraro","year":"1990","journal-title":"Diabetes Care"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1305","DOI":"10.2337\/diab.40.10.1305","article-title":"Chronology and determinants of tissue repair in diabetic lower-extremity ulcers","volume":"40","author":"Pecoraro","year":"1991","journal-title":"Diabetes"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"17S","DOI":"10.1016\/j.jvs.2010.06.003","article-title":"The costs of diabetic foot: The economic case for the limb salvage team","volume":"52","author":"Driver","year":"2010","journal-title":"J. Vasc. Surg."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"179S","DOI":"10.1097\/PRS.0000000000002686","article-title":"The role of pressure offloading on diabetic foot ulcer healing and prevention of recurrence","volume":"138","author":"Bus","year":"2016","journal-title":"Plast. Reconstr. Surg."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1002\/dmrr.2696","article-title":"IWGDF guidance on the prevention of foot ulcers in at-risk patients with diabetes","volume":"32","author":"Bus","year":"2016","journal-title":"Diabetes Metab. Res. Rev."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1002\/dmrr.2701","article-title":"Prevention of foot ulcers in the at-risk patient with diabetes: A systematic review","volume":"32","author":"Price","year":"2016","journal-title":"Diabetes Metab. Res. Rev."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"169","DOI":"10.1093\/ptj\/77.2.169","article-title":"Infrared dermal thermometry for the high-risk diabetic foot","volume":"77","author":"Armstrong","year":"1997","journal-title":"Phys. Ther."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"335","DOI":"10.1016\/S1067-2516(96)80083-4","article-title":"Monitoring neuropathic ulcer healing with infrared dermal thermometry","volume":"35","author":"Armstrong","year":"1996","journal-title":"J. Foot Ankle Surg."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"443","DOI":"10.7547\/87507315-93-6-443","article-title":"Skin temperatures as a one-time screening tool do not predict future diabetic foot complications","volume":"93","author":"Armstrong","year":"2003","journal-title":"J. Am. Podiatr. Med. Assoc."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"302","DOI":"10.1111\/j.1742-481X.2006.00269.x","article-title":"Does dermal thermometry predict clinical outcome in diabetic foot infection? Analysis of data from the SIDESTEP* trial","volume":"3","author":"Armstrong","year":"2006","journal-title":"Int. Wound J."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1042","DOI":"10.1016\/j.amjmed.2007.06.028","article-title":"Skin temperature monitoring reduces the risk for diabetic foot ulceration in high-risk patients","volume":"120","author":"Armstrong","year":"2007","journal-title":"Am. J. Med."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"2642","DOI":"10.2337\/diacare.27.11.2642","article-title":"Home monitoring of foot skin temperatures to prevent ulceration","volume":"27","author":"Lavery","year":"2004","journal-title":"Diabetes Care"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"14","DOI":"10.2337\/dc06-1600","article-title":"Preventing diabetic foot ulcer recurrence in high-risk patients: Use of temperature monitoring as a self-assessment tool","volume":"30","author":"Lavery","year":"2007","journal-title":"Diabetes Care"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"12","DOI":"10.2196\/12460","article-title":"Continuous temperature-monitoring socks for home use in patients with diabetes: Observational study","volume":"20","author":"Reyzelman","year":"2018","journal-title":"J. Med. Internet Res."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"973","DOI":"10.2337\/dc16-2294","article-title":"Feasibility and efficacy of a smart mat technology to predict development of diabetic plantar ulcers","volume":"40","author":"Frykberg","year":"2017","journal-title":"Diabetes Care"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"407","DOI":"10.14423\/SMJ.0000000000000131","article-title":"Declaration of Helsinki-the world\u2019s document of conscience and responsibility","volume":"107","author":"Holt","year":"2014","journal-title":"South. Med. J."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"307","DOI":"10.1016\/S0140-6736(86)90837-8","article-title":"Statistical methods for assessing agreement between two methods of clinical measurement","volume":"327","author":"Bland","year":"1986","journal-title":"Lancet"},{"key":"ref_21","unstructured":"Portney, L.G., and Watkins, M.P. (2009). Foundations of Clinical Research: Applications to Practice, Pearson\/Prentice Hall."},{"key":"ref_22","first-page":"35","article-title":"Prevalence of foot pathology and lower extremity complications in a diabetic outpatient clinic","volume":"26","author":"Holewski","year":"1989","journal-title":"J. Rehabil. Res. Dev."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"342","DOI":"10.1177\/107110079701800606","article-title":"Prevalence of radiographic foot abnormalities in patients with diabetes","volume":"18","author":"Smith","year":"1997","journal-title":"Foot Ankle Int."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1063","DOI":"10.2337\/dc08-2174","article-title":"Role of intrinsic muscle atrophy in the etiology of claw toe deformity in diabetic neuropathy may not be as straightforward as widely believed","volume":"32","author":"Bus","year":"2009","journal-title":"Diabetes Care"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1697","DOI":"10.2337\/dc13-2470","article-title":"Risk factors for plantar foot ulcer recurrence in neuropathic diabetic patients","volume":"37","author":"Waaijman","year":"2014","journal-title":"Diabetes Care"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"621","DOI":"10.1016\/j.jdiacomp.2013.07.004","article-title":"Diabetic foot ulcer incidence in relation to plantar pressure magnitude and measurement location","volume":"27","author":"Ledoux","year":"2013","journal-title":"J. Diabetes Complicat."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"132","DOI":"10.1016\/j.diabres.2019.01.032","article-title":"Validation of low-cost smartphone-based thermal camera for diabetic foot assessment","volume":"149","year":"2019","journal-title":"Diabetes Res. Clin. Pract."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1186\/s13047-018-0266-1","article-title":"Reliability of a novel thermal imaging system for temperature assessment of healthy feet","volume":"11","author":"Petrova","year":"2018","journal-title":"J. Foot Ankle Res."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1080\/03091902.2017.1409818","article-title":"Comparison of non-contact infrared skin thermometers","volume":"42","author":"Fletcher","year":"2018","journal-title":"J. Med. Eng. Technol."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/11\/3645\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T06:06:51Z","timestamp":1760162811000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/11\/3645"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,5,24]]},"references-count":29,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2021,6]]}},"alternative-id":["s21113645"],"URL":"https:\/\/doi.org\/10.3390\/s21113645","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,5,24]]}}}