Diabetes Mellitus, Healthy
Conditions
Brief summary
A single-site, open label, confirmatory study assessing two biomarkers indicative of levels of glycaemia; glycated keratin in fingernails and glycated haemoglobin (HbA1c). Screening for diabetes
Interventions
both interventions will be applied in both participant groups
Sponsors
Study design
Eligibility
Inclusion criteria
* Apparently healthy adults (≥18 years of age) with known (n=50) or unknown T2DM status (n=50) willing to participate in and provide a written consent for the study * willingness to undertake assisted assessment of glycaemia by both the NIR spectra measurement, and HbA1c by finger prick test * Individuals with at least one visually assessed undamaged, intact (preferably middle) fingernail
Exclusion criteria
* Individuals with any known medical conditions impacting the PoC device assessment methodology for glycaemia, such as * Severe forms of anaemia (diagnosed iron deficiency, sickle cell anaemia or similar) * haemoglobinopathies or atypical haemoglobin subtypes not detectable by the assay * severe renal impairment (CKD stage III-IV) or decompensated hepatic disease * severe Vitamin D deficiency (diagnosed or measured 25(OH)D3 \< 25 nmol/ml) * known severe immunodeficiency such as HIV, malignancy or other chronic condition significantly impacting assessment of glycaemia * eating disorders (as per clinical assessment) * recent (within 28 days) blood donation * known / diagnosed other diabetes such as T1DM, GDM, MODY, etc. * For the Glyconics-DS device / targeted nail: * Mechanical damage or marks on the surface of the nail after removal of nail polish, or * Use of acrylic or gel nail decoration and polish, which cannot be removed.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Specificity (%) meeting the acceptability criteria in identification correct dichotomised output / diabetes screening test result (being above or below HbA1c level of 48 mmol/mol) | 10 minutes | Acceptance criteria for specificity is to demonstrate a result being at least or above 75% |
| Sensitivity (%) meeting the acceptability criteria in identification correct dichotomised output / diabetes screening test result (being above or below HbA1c level of 48 mmol/mol) | 10 minutes | Acceptance criteria for sensitivity is to demonstrate a result being at least or above 30% |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Secondary performance measure and accuracy: False positive / negative rates for the screening test result | 10 minutes | Assessment of sensitivity and specificity -derived false positive / false negative rates in % for chemometric model outcomes for HbA1c cut-off value of 48 mmol/mol (6.5%) in the study cohort n=100, in individuals with and without known T2DM. |
Countries
United Kingdom