Table 1.
Baseline variables for all patients and for those normocalcemic and hypocalcemic.
| Variable | All patients | Normocalcaemic (n = 420) |
Hypocalcaemic (n = 539) |
P value |
|---|---|---|---|---|
| Age (years) | 61 (48-73) | 63 (47-73) | 61 (49.5-72) | 0.83 |
| Male sex | 590 (56.8) | 246 (58.6) | 298 (55.3) | 0.31 |
| APACHE II score | 18 (13-23) | 18 (13-23) | 19 (14-23) | 0.18 |
| Septic during first 3 days | 531 (51.2) | 199 (47.4) | 308 (57.2) | 0.002 |
| Alive at 28 days | 848 (81.7) | 347 (82.6) | 432 (80.1) | 0.33 |
| Length of stay (days) | 8 (4-16) | 8 (4-15.5) | 9 (4-19) | 0.04 |
| pH | 7.38 (7.3-7.44) | 7.38 (7.31-7.44) | 7.37 (7.3-7.44) | 0.54 |
| Sodium | 138 (134-141) | 138 (135-144) | 137 (133-141) | 0.015 |
| Potassium | 4.2 (3.8-4.6) | 4.2 (3.8-4.6) | 4.2 (3.8-4.7) | 0.6 |
| Phosphate | 1.19 (0.91-1.53) | 1.14 (0.91-1.44) | 1.27 (0.91-1.61) | 0.003 |
| Magnesium | 0.78 (0.66-0.89) | 0.8 (0.69-0.89) | 0.75 (0.64-0.89) | 0.002 |
| Lactate | 1.5 (1-2.5) | 1.4 (1-2.3) | 1.7 (1.1-2.8) | <0.001 |
| Albumin | 24 (18-30) | 26 (20-33) | 21 (21-26) | <0.001 |
Values represent total (%) for categorical variables and median (interquartile range) for continuous variables. Mann-Whitney U test used for continuous variables, chi-squared test for categorical.
APACHE2, Acute Physiology and Chronic Health Evaluation II score.