Postoperative outcomes for sensitivity analysis of patients who had 25-hydroxyvitamin D levels obtained within 90 days of surgery (n=594)
| n | VDD (≤20 ng/mL) (n=277) Mean (95% CI) or n (%) | n | Non-VDD (>20 ng/mL) (n=317) Mean (95% CI) or n (%) | P value | |
| Total calcium (mg/dL) | 134 | 8.0 (7.8 to 8.2) | 267 | 8.4 (8.3 to 8.5) | <0.01 |
| Corrected calcium (mg/dL) | 96 | 8.3 (8.1 to 8.4) | 205 | 8.4 (8.3 to 8.5) | 0.10 |
| Ionized calcium (mmol/L) | 72 | 1.1 (1.1 to 1.1) | 112 | 1.1 (1.1 to 1.2) | 0.27 |
| Phosphorus (mg/dL) | 97 | 3.2 (3.0 to 3.4) | 144 | 3.4 (3.3 to 3.5) | 0.15 |
| PTH (pg/mL) | 97 | 36.4 (30.1 to 44.9) | 217 | 29.8 (26.2 to 34.2) | 0.04* |
| Magnesium (mg/dL) | 144 | 1.7 (1.6 to 1.7) | 207 | 1.8 (1.7 to 1.8) | <0.01 |
| Creatinine (mg/dL) | 83 | 0.7 (0.6 to 0.7) | 193 | 0.8 (0.8 to 0.8) | <0.01 |
| Albumin (g/dL) | 176 | 3.7 (3.6 to 3.8) | 217 | 3.8 (3.7 to 3.9) | 0.59 |
| Length of stay, hours | 168 | 34.0 (29.4 to 39.8) | 169 | 30.7 (26.5 to 35.9) | 0.21* |
| Same-day discharge | 109 (39.4) | 148 (46.7) | 0.07 | ||
| Intravenous calcium therapy | 2 (0.7) | 6 (1.9) | 0.29 | ||
| Calcium and/or vitamin D supplement on discharge | 120 (43.3) | 187 (59.0) | <0.01 |
χ2 test for categorical variables, ANOVA for normally distributed variables and likelihood ratio test for exponentially distributed variables.
*Likelihood ratio test.
ANOVA, analysis of variance; PTH, parathyroid hormone; VDD, vitamin D deficiency.