Table 1.
Participant Characteristics.
| Total Group |
Younger Adults | Older Adults |
P * | |
|---|---|---|---|---|
| Sex (M/F) | 11/19 | 9/9 | 2/10 | — |
| Age (years) | 38.4 ± 10.4 (20–69) |
25.1 ± 4.8 (20–37) |
58.3 ± 5.1 (50–69) |
0.0001 * |
| Skin Type (II/III) | 3/27 | 3/15 | 0/12 | — |
| Hair (Bl/Br/R) | 7/21/2 | 5/12/1 | 2/9/1 | — |
| Mass (kg) | 71.2 ± 15.2 (50.1–106.1 |
71.8 ± 13.4 (54.2–102.1) |
70.4 ± 18.2 (50.1–106) |
0.816 |
| Height (cm) | 170.4 ± 7.9 (156.5–186.0) |
173.3 ± 7.4 (156.5–186) |
166.2 ± 6.8 (159.0–179) |
0.013 * |
| BMI (kg/m2) | 24.4 ± 4.5 (18.7–39.4) |
23.8 ± 3.2 (20.0–30.0) |
25.4 ± 6.1 (18.7–39.4) |
0.34 |
| Body Fat (%) | 30.3 ± 10.3 (11.9–54.0) |
28.8 ± 9.4 11.9–47.7) |
32.5 ± 11.5 (12.7–54.0) |
0.35 |
| Vitamin D Intake (IU) | 187 ± 182 (20–828) |
183.5 ± 167.4 (20–828) |
151.3 ± 96.2 (64–385) |
0.64 |
| Sun Exposure (h/month) | 14.5 ± 15.2 (0–60) |
13.4 ± 17.4 (0–60) |
16.2 ± 16.9 (2–60) |
0.63 |
| Baseline Serum D3 (nmol/L) | 15.0 ± 19.5 (3.7–110.1) |
18.0 ± 24.2 (3.7–110.1) |
10.7 ± 8.2 (3.7–30.0) |
0.33 |
| Baseline Serum D2 (nmol/L) | <3.7 | <3.7 | <3.7 | — |
| Baseline Serum 25(OH)D (nmol/L) | 84.9 ± 26.0 (42.4–166.5) |
86.6 ± 6.3 (56.7–166.5) |
82.6 ± 7.5 (42.4–123.5) |
0.69 |
Data are mean ± SD with ranges shown in parentheses. Bl, blond; Br, brown; R, red BMI, body mass index. * Difference between older and younger cohorts via Independent Samples t-tests.