About this trial
This cross-sectional observational study validates the concordance of a low-cost thermographic camera (HIKMICRO Mini2 V2, \~200 Euro) against a professional clinical standard (HIKMICRO M60) for diabetic foot assessment. Both cameras simultaneously capture plantar thermographic images from 130 participants with diabetes mellitus. Maximum contralateral thermal asymmetry (Delta T\_max) across 6 plantar regions of interest (ROIs) is the primary endpoint, analyzed by intraclass correlation coefficient (ICC) and Bland-Altman method.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Age 18 years and older.
Diagnosed with Type 1 or Type 2 Diabetes Mellitus.
Ability to understand and sign the informed consent.
Disqualifiers
Active foot ulcers.
Recent surgery on the lower limbs.
Cognitive impairment that prevents following the study protocol.
Trial population
Patients with type 1 or type 2 diabetes mellitus attending the outpatient clinic for diabetic foot screening and assessment.
Trial design
Cohort
Prospective
Treatments tested in this trial
HIKMICRO® Mini2 V2
DeviceLow-cost infrared thermographic camera (256x192 px, NETD \<40mK, cost \~200€)
HIKMICRO® M60
DeviceProfessional infrared thermographic camera used as clinical reference standard
Treatment groups
Trial outcomes
Primary outcomes
Intraclass Correlation Coefficient (ICC) of absolute agreement for maximum contralateral thermal asymmetry (Delta T_max) between HIKMICRO Mini2 V2 and M60
ICC calculated using a two-way mixed-effects model. ICC \> 0.90 defined as excellent agreement. Delta T\_max is the highest contralateral thermal asymmetry value among 6 plantar regions of interest per participant.
Bland-Altman limits of agreement for Delta T_max
Secondary outcomes
Cohen's Kappa for binary classification of clinical risk hot spot (Delta T_max > 2.2 deg C)
Sensitivity and Specificity of HIKMICRO Mini2 V2 for hot spot detection using M60 as reference standard
Sponsors and contacts
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