Survey and Questionnaire Data: Demographics, Center for Epidemiological Studies Depression Scale, Problem Areas in Diabetes questionnaire, Diabetes Score (self-care assessment), dietary assessment, ophthalmic survey, smoking/alcohol/vaping/marijuana use history, general health history, Social Determinants of Health surveys (food and job insecurity, educational attainment, health insurance, access to healthcare, housing, neighborhood environment, perceptions of discrimination in medical settings, racial/ethnic discrimination), and current medications with RxNorm codes. Collected via REDCap database.
| subset-001 |
Physical Measurements and Vitals: Height, weight, waist and hip circumference, waist-hip ratio, body mass index, systolic and diastolic blood pressure, heart rate. Measured during single visit lasting 2.5-4 hours.
| subset-002 |
Retinal Imaging Data: Multidevice retinal imaging including Aurora IQ (undilated fundus photos), EIDON widefield truecolor confocal fundus system, Spectralis OCT/OCTA, Maestro2 3D OCT-1, Triton DRI OCT, Cirrus 5000, and Fluorescence Lifetime Imaging Ophthalmoscopy. Both eyes imaged per participant. Images exported in raw formats and converted to DICOM standard. Total of 44 images per participant across multiple devices capturing color fundus photos, optical coherence tomography, optical coherence tomography angiography, infrared imaging, and fundus autofluorescence.
| subset-003 |
Electrocardiogram Data: 12-lead ECG performed using Philips Pagewriter TC30 Cardiograph while participant sits in reclining chair or lies supine. Position recorded (0°, 30°, 60°, or 90° relative to supine). Data exported in XML format.
| subset-004 |
Cognitive Function Testing: Montreal Cognitive Assessment (MoCA) administered electronically on iPad using MoCA Duo Application. Total possible score is 30, with higher numbers representing better performance. Generates total score, section subscores, Memory Index Score, and task completion times in CSV format.
| subset-005 |
Peripheral Neuropathy Assessment: Monofilament test assessing touch perception on both feet using 10g filament in three locations per foot (10 times per location). Participants respond yes/no whether they feel the filament with eyes closed and shoes/socks removed.
| subset-006 |
Visual Function Testing: Photopic and mesopic visual acuity measured with Electronic Visual Acuity tester (right and left eyes tested separately). Photopic and mesopic letter contrast sensitivity measured with Mars chart. Mesopic conditions achieved by viewing through 2.0 neutral density filter. Autorefraction data (spherical and cylindrical components expressed as diopter with cylindrical axis) obtained using Topcon KR 800 autorefractor for each eye.
| subset-007 |
Clinical Laboratory Tests: Comprehensive blood and urine testing including HbA1c, complete blood count, EDTA plasma tests (NT-proBNP, troponin-T, C-peptide, insulin), serum tests (CRP-HS, total cholesterol, triglycerides, HDL/LDL cholesterol, glucose, blood urea nitrogen, creatinine, electrolytes, calcium, protein, albumin, globulin, bilirubin, alkaline phosphatase, AST, ALT), and urine tests (creatinine, albumin). Testing performed by CLIA-certified local laboratories (CBC on fresh samples) and University of Washington Nutrition and Obesity Research Center (NORC) testing facility (frozen samples). Results provided in CSV format.
| subset-008 |
Continuous Glucose Monitoring: Dexcom G6 Continuous Glucose Monitor worn for 10 days at home, measuring blood glucose (mg/dL) every 5 minutes. Participants masked to results during monitoring period. Data exported in CSV format. Participants receive Dexcom report with average blood glucose levels (hourly, daily, overall) and Glucose Management Indicator after 10-day period.
| subset-009 |
Physical Activity Monitoring: Garmin VivoSmart 5 fitness tracker worn for 10 days at home, collecting number of steps, heart rate, sleep duration (circadian and diurnal rhythm), and oxygen saturation. Device chosen for privacy (no video/audio, no GPS, not synced with participant devices). Data exported in FIT file format and converted to mHealth standard. Participants indicate which wrist worn and dominant hand.
| subset-010 |
Home Environmental Monitoring: Custom-designed environmental sensor placed in home for 10 days, collecting ambient temperature, relative humidity, nitrogen oxides (NO and NO2), volatile organic compounds, particulate matter (PM1.0, PM2.5, PM4, PM10), and multi-spectral light intensity measurements (11 channels). Device designed with privacy as primary concern (no video/audio, no GPS). Data exported in CSV format. Participants indicate sensor placement location in home.
| subset-011 |
Biorepository Specimens: Blood derivatives including buffy coats (for DNA extractions and future genomics), genomic DNA, EDTA plasma (for future proteomics and metabolomics), serum (for future proteomics and metabolomics), PAXgene vacutainers (for future RNA isolations and gene expression studies), and peripheral blood mononuclear cells (for future immunological studies and generation of induced pluripotent stem cells). Biospecimens stored at UAB Center for Clinical and Translational Science (CCTS) biorepository at -70°C. Samples batch-shipped from UCSD and UW to UAB on dry ice approximately quarterly. Standardized operating procedures ensure consistent handling.
| subset-012 |