Table 3.
Correlation of different serum Mg levels with osteoporosis and bone metabolism parameters.
| Variables | Serum Mg (mg/dL) | P | ||
|---|---|---|---|---|
| <1.82 (n = 6) | 1.82–2.31 (n = 33) | >2.31 (n = 17) | ||
| Osteoporosis | ||||
| With | 4 (66.7) | 13 (39.4) | 5 (29.4) | 0.314 |
| Without | 2 (33.3) | 20 (60.6) | 12 (70.6) | |
| Bone metabolism parameters | ||||
| iPTH (pg/mL) | 32.2 (20.0–62.4) | 86.4 (45.9–133.0) | 126.0 (80.8–221.5) | 0.007 |
| Serum Ca (mg/dL) | 9.0 (8.7–9.5) | 8.9 (8.6–9.3) | 8.7 (8.2–8.9) | 0.018 |
| Serum P (mg/dL) | 3.5 (3.1–4.1) | 3.9 (3.4–4.1) | 4.4 (3.7–5.0) | 0.026 |
| ALK-P (U/L) | 88.5 (74.3–102.4) | 79.0 (66.5–89.8) | 87.0 (79.0–116.5) | 0.061 |
| 25(OH)D (ng/mL) | 27.2 (17.7–37.3) | 22.7 (18.5–28.0) | 23.6 (14.6–28.0) | 0.631 |
| 1,25(OH)2D (pg/mL) | 24.0 (15.5–29.4) | 16.6 (11.9–31.2) | 15.4 (11.8–23.9) | 0.516 |
| Serum Ca/Mg ratio | 5.1 (5.0–5.6) | 4.1 (3.8–4.4) | 3.4 (2.8–3.6) | <0.001 |
| Serum Ca × P value | 31.2 (27.8–38.1) | 33.8 (29.5–38.3) | 37.4 (34.6–41.9) | 0.128 |
(1) iPTH, intact parathyroid hormone; ALP, alkaline phosphatase; 25(OH)D, 25-hydroxyvitamin D; 1,25(OH)2D, 1,25-dihydroxyvitamin D.
(2) Comparisons of continuous data between three groups were analyzed by Kruskal Wallis test. Data are median and range (25th pctl–75th pctl).
(3) Comparisons of categorical data between two groups were analyzed by Chi-square test. When cells have expected count less than 5, data were analyzed by Fisher's Exact test. Data are number (n), percent (%).
(4) A P value less than 0.05 was considered statistically significant.