Table 1.
Postoperative hypocalcemia group and normal calcium level after thyroidectomy.
| Variable | Hypocalcemia (level <8 mg/dL) (n=112, 52.1%) | No hypocalcemia (level ≥8 mg/dL) (n=103, 47.9%) | P value |
|---|---|---|---|
| Age | |||
| <55 years | 87 (77.7) | 73 (70.9) | .253 |
| ≥55 years | 25 (22.3) | 30 (29.1) | |
| Gender | .673 | ||
| Female | 82 (73.2) | 78 (75.7) | |
| Male | 30 (26.8) | 25 (24.3) | |
| Compression symptoms | |||
| Yes | 30 (26.8) | 18 (17.5) | .244 |
| No | 76 (67.9) | 80 (77.7) | |
| PTH (preoperative) | |||
| <10 pg/dL | 1 (.9) | 3 (2.9) | .274 |
| ≥10 pg/dL | 111 (99.1) | 100 (97.1) | |
| Vitamin D level (preoperative) | |||
| <25 ng/dL | 86 (76.8) | 68 (66) | .080 |
| ≥25 ng/dL | 26 (23.2) | 35 (34) | |
| Completion thyroidectomy | |||
| Yes | 8 (7.1) | 17 (16.5) | .032 |
| No | 104 (92.9) | 86 (83.5) | |
| Total thyroidectomy | |||
| Yes | 104 (92.9) | 86 (83.5) | .032 |
| No | 8 (7.1) | 17 (16.5) | |
| Bilateral neck dissection | |||
| Yes | 12 (10.7) | 3 (2.9) | .025 |
| No | 100 (89.3) | 100 (97.1) | |
| Left side neck dissection | |||
| Yes | 5 (4.5) | 2 (1.9) | .298 |
| No | 107 (95.5) | 101 (98.1) | |
| Right side neck dissection | |||
| Yes | 7 (6.3) | 3 (2.9) | .246 |
| No | 105 (93.8) | 100 (97.1) | |
| Malignancy | |||
| Yes | 64 (57.1) | 52 (50.5) | .328 |
| No | 48 (42.9) | 51 (49.5) | |
| Lymphovascular invasion | |||
| Yes | 25 (22.3) | 14 (13.6) | .257 |
| No | 39 (34.8) | 37 (35.9) | |
| Not applicable | 47 (42) | 52 (50.5) | |
| Inadvertent parathyroidectomy | |||
| Yes | 39 (34.8) | 8 (7.8) | .001 |
| No | 73 (65.2) | 95 (92.2) | |
| PTH (Postoperative) | |||
| <10 pg/dL | 77 (68.8) | 24 (23.3) | .001 |
| ≥10 pg/dL | 35 (31.3) | 79 (76.7) | |
| PTH (after 6 months) | |||
| <10 pg/dL (Permanent) | 23 (20.5) | 5 (4.9) | .001 |
| ≥10 pg/dL (Transient) | 89 (79.5) | 98 (95.1) | |
| Calcium (after 6 months) | |||
| <8 mg/dL (Permanent) | 13 (11.6) | 4 (3.9) | .036 |
| ≥8 mg/dL (Transient) | 99 (88.4) | 99 (96.1) | |
| Symptoms of hypocalcemia | |||
| Yes | 66 (58.9) | 4 (3.9) | .001 |
| No | 46 (41.1) | 99 (96.1) | |
| Revision surgery | |||
| Neck dissection | 3 (2.7) | 2 (1.9) | .690 |
| Not applicable | 47 (42) | 49 (47.6) | |
| Not done | 62 (55.4) | 52 (50.5) | |
| Need IV Calcium | |||
| Yes | 24 (21.4) | 2 (1.9) | .001 |
| No | 88 (78.6) | 101 (98.1) | |
| Retrosternal thyroid extension | |||
| Yes | 13 (11.6) | 9 (8.7) | .488 |
| No | 99 (88.4) | 94 (91.3) | |
| Number of parathyroid glands resected | |||
| 0 | 80 (71.4) | 88 (85.4) | .020 |
| 1 | 25 (78.1) | 8 (53.3) | |
| 2 | 7 (21.9) | 6 (40) | |
| 3 | 0 | 1 (6.7) | |
Data are number (percentage).