Table 4 Serum vitamin D quartiles in relation to biochemical parameters and dietary intake
| Â | Serum vitamin D quartile [nmol/L] | ||||
|---|---|---|---|---|---|
1 [18–69] n = 179 | 2 [70–86] n = 187 | 3 [87–104] n = 177 | 4 [105–173] n = 184 | All n = 727 | |
Column percent* | |||||
Albumin | |||||
 1 (30.0–39.0) | 30.2 | 25.7 | 26.0 | 23.4 | 26.3 |
 2 (39.1–40.9) | 21.2 | 24.6 | 20.3 | 23.9 | 22.6 |
 3 (41.0–42.2) | 22.9 | 26.7 | 31.6 | 20.1 | 25.3 |
 4 (42.3–50.3) | 22.9 | 22.5 | 21.5 | 32.1 | 24.8 |
Creatinine | |||||
 1 (42–58) | 30.2 | 27.8 | 26.0 | 20.1 | 26.0 |
 2 (59–64) | 22.3 | 24.6 | 24.3 | 21.2 | 23.1 |
 3 (65–71) | 28.5 | 24.6 | 23.2 | 24.5 | 25.2 |
 4 (72–130) | 16.2 | 22.5 | 26.0 | 33.7 | 24.6 |
Phosphate | |||||
 1 (0.66–1.07) | 29.6 | 21.4 | 24.9 | 23.9 | 24.9 |
 2 (1.08–1.19) | 29.6 | 26.7 | 24.9 | 19.0 | 25.0 |
 3 (1.20–1.32) | 23.5 | 20.3 | 28.8 | 24.5 | 24.2 |
 4 (1.33–2.00) | 14.5 | 31.0 | 20.9 | 32.1 | 24.8 |
PTH | |||||
 1 (0.38–2.63) | 22.3 | 17.6 | 26.0 | 33.7 | 24.9 |
 2 (2.64–3.55) | 18.4 | 27.3 | 29.9 | 22.3 | 24.5 |
 3 (3.56–4.89) | 23.5 | 28.3 | 21.5 | 25.0 | 24.6 |
 4 (4.90–30.60) | 34.1 | 25.1 | 22.6 | 18.5 | 25.0 |
Calcium | |||||
 1 (2.18–2.34) | 35.8 | 26.2 | 22.6 | 24.5 | 27.2 |
 2 (2.35–2.38) | 19.6 | 24.6 | 23.2 | 17.4 | 21.2 |
 3 (2.39–2.44) | 26.8 | 23.5 | 27.7 | 26.1 | 26.0 |
 4 (2.45–2.77) | 15.1 | 24.6 | 26.0 | 32.1 | 24.5 |
Vitamin D– dietary | |||||
 1 (0.83–7.19) | 30.2 | 16.6 | 15.8 | 17.4 | 19.9 |
 2 (2.67–10.17) | 21.8 | 21.4 | 16.9 | 20.1 | 20.1 |
 3 (2.66–11.86) | 15.6 | 25.1 | 21.5 | 17.4 | 19.9 |
 4 (3.54–12.57) | 19.0 | 17.1 | 21.5 | 22.8 | 20.1 |
 5 (5.14–22.83) | 13.4 | 19.8 | 24.3 | 22.3 | 19.9 |
Calcium– dietary | |||||
 1 (275.8–1203.8) | 21.8 | 19.3 | 16.9 | 21.7 | 19.9 |
 2 (435.5–1712.1) | 19.0 | 23.0 | 19.2 | 19.0 | 20.1 |
 3 (460.7–1669.4) | 17.3 | 18.7 | 23.7 | 20.1 | 19.9 |
 4 (636.6–2399.4) | 21.2 | 16.6 | 22.6 | 20.1 | 20.1 |
 5 (779.5–2791.5) | 20.7 | 22.5 | 17.5 | 19.0 | 19.9 |
Vitamin D–total** | |||||
 1 (0.83–9.31) | 31.8 | 16.0 | 16.9 | 15.2 | 19.9 |
 2 (2.66–11.86) | 20.7 | 25.7 | 12.4 | 21.2 | 20.1 |
 3 (3.97–12.57) | 18.4 | 18.2 | 23.2 | 20.1 | 19.9 |
 4 (4.84–16.55) | 12.8 | 20.9 | 24.3 | 22.3 | 20.1 |
 5 (6.47–37.01) | 16.2 | 19.3 | 23.2 | 21.2 | 19.9 |
Calcium–total** | |||||
 1 (275.8–1203.8) | 22.9 | 18.7 | 15.8 | 22.3 | 19.9 |
 2 (435.5–1712.1) | 17.9 | 23.0 | 23.2 | 16.3 | 20.1 |
 3 (532.6–2089.9) | 18.4 | 19.8 | 20.9 | 20.7 | 19.9 |
 4 (723.5–2399.4) | 22.3 | 17.1 | 19.8 | 21.2 | 20.1 |
 5 (782.7–2986.8) | 18.4 | 21.4 | 20.3 | 19.6 | 19.9 |