Table 2 Studied population related to hypocalcemia
Variable | Hypocalcemia (n = 795) | Normocalcemia (n = 1313) | P value |
|---|---|---|---|
Sex | |||
 female | 701 (42%) | 968 (58%) | P < 0.0001 |
 male | 94 (21.4%) | 345 (78,6%) |  |
Age (y) | |||
 mean ± sd | 55.03 (±13,87) | 54.01 (±13.47) | N.S. |
 range |  |  |  |
Age groups | |||
  < 40 | 114 (36.9%) | 195 (63.1%) |  |
 40–50[ | 190 (43.3%) | 249 (56.7%) |  |
 50–60[ | 211 (38.6%) | 336 (61.4%) | N.S. |
  > 60 | 280 (34.5%) | 532 (65.5%) |  |
Post-menopausal age (tot.1669) | |||
 yes | 40.1% | 59.9% | N.S. |
 no | 45.2% | 54.8% |  |
Preoperative diagnosis | |||
 malignant | 301 (36.5%) | 523 (63.5%) | N.S. |
 benign | 494 (38.5%) | 790 (61.5%) |  |
Hyperthyroidism | |||
 yes | 148 (38.8%) | 234 (61.2%) | N.S. |
 no | 647 (37.5%) | 1115 (62.5%) |  |
Thyroiditis | |||
 yes | 272 (37.4%) | 455 (62.6%) | N.S. |
 no | 523 (37.9%) | 858 (62.1%) |  |
Diabetes | |||
 yes | 63 (34.8%) | 118 (65.2%) | N.S. |
 no | 732 (38%) | 1195 (62%) |  |
Hypertension | |||
 yes | 181 (31.3%) | 420 (68.7%) | P < 0.001 |
 no | 607 (40.3%) | 900 (59.7%) |  |
Definitive histological diagnosis (tot. 1914) | |||
 malignant | 270 (40.5%) | 397 (59.5%) | N.S. |
 benign | 458 (36.7%) | 789 (63.7%) |  |
Surgical procedure | |||
 total thyroidectomy | 782 (38.8%) | 1232 (61.2%) | P < 0.001 |
 lobectomy | 13 (13.8%) | 81 (86.2%) |  |
Total number of parathyroid glands identified during operation (tot. 1202) | |||
 0 | 2 (12.5%) |  |  |
 1 | 14 (20.6%) |  | N.S. |
 2 | 125 (32.1%) |  |  |
 3 | 221 (33.7%) |  |  |
 4 | 28 (38.4%) |  |  |
Preoperative calcium levels (mg/dl) | |||
 mean ± sd | 9.172 (±0.38) | 9.35 (±0.43) | N.S. |
Preoperative pth (pg/ml) | |||
 mean ± sd (tot. 813) | 59.03 (±24.336) | 56.78 (±21.195) | N.S. |
Calcium drop from preoperative to postoperative (24 h) | |||
 mean ± sd | 1.67 (±0.49) | 0.920 (±0.47) | P < 0.001 |