Table 1.
Subject characteristics
| Mean ± SE | Range | |
|---|---|---|
| n (M/F) | 22 (8/14) | |
| Age, yr | 23 ± 1 | 18–28 |
| BMI, kg/m2 | 24 ± 1 | 19–31 |
| Systolic BP, mmHg | 112 ± 2 | 94–120 |
| Diastolic BP, mmHg | 70 ± 2 | 56–88 |
| Heart rate, beats/min | 65 ± 3 | 44–80 |
| M-index, a.u. | ||
| Inner arm | 46 ± 4 | 30–79 |
| Forehead | 52 ± 4 | 32–98 |
| Forearm | 45 ± 4 | 31–83 |
| Blood biochemistry | ||
| HbA1c, % | 5.0 ± 0.1 | 4.2–5.6 |
| Total cholesterol, mg/dl | 154 ± 8 | 83–209 |
| HDL, mg/dl | 60 ± 4 | 37–79 |
| LDL, mg/dl | 79 ± 6 | 21–118 |
n = no. of participants. a.u., arbitrary units; BMI, body mass index; BP, blood pressure; M-index, a skin-reflectance measure of melanization; HbA1c, hemoglobin A1C; HDL, high density lipoprotein; LDL, low density lipoprotein.