Table 2. Comparisons between patients with 3 and 4 identified parathyroid glands.
| Characteristics | 3 identified parathyroid glands (N=212) | 4 identified parathyroid glands (N=1,212) | P value |
|---|---|---|---|
| Age, years | 41.2±12.9 | 41.4±11.4 | 0.800 |
| Sex (male) | 59 | 323 | 0.721 |
| BMI | 23.0±3.5 | 23.1±4.0 | 0.676 |
| NG | 107 | 602 | 0.829 |
| HD | 71/212 (33.5%) | 269/1,212 (22.2%) | <0.001* |
| Hypertension | 24 | 93 | 0.074 |
| Diabetes | 6 | 39 | 0.766 |
| Hypothyroidism | 4 | 22 | 1.000 |
| Hyperthyroidism | 7 | 27 | 0.345 |
| Tumor size (mm) | 14.3±8.2 | 14.1±9.0 | 0.769 |
| Multifocality | 58 | 289 | 0.235 |
| Capsule invasion | 95 | 491 | 0.241 |
| TNM stage | |||
| Tx/T1/T2/T3/T4 | 1/101/10/93/7 | 7/655/82/408/59 | 0.068 |
| Nx/N0/N1a/N1b | 1/69/85/57 | 8/504/399/299 | 0.065 |
| Accidently resection | 30/212 (14.2%) | 64/1,212 (5.3%) | <0.001* |
| Hypoparathyroidism | |||
| Transient | 116/212 (54.7%) | 650/1,212 (53.6%) | 0.770 |
| Permanent | 3/212 (1.4%) | 18/1,212 (1.5%) | 1.000 |
| PTH (pg/mL) | |||
| Preoperative | 43.74±9.90 | 45.09±1.09 | 0.079 |
| 1-day | 15.57±10.08 | 16.02±10.35 | 0.514 |
| 1-month | 29.88±11.43 | 34.65±13.77 | <0.001* |
| 3-month | 32.85±13.59 | 37.71±14.40 | 0.008* |
| 6-month | 34.02±12.78 | 38.25±13.23 | 0.015* |
| 12-month | 35.91±13.95 | 38.61±13.41 | 0.185 |
| 24-month | 33.30±12.69 | 36.00±12.24 | 0.280 |
| PTH <14 pg/mL | |||
| 1-day | 115 (54.5%) | 647 (54.5%) | 0.999 |
| 1-month | 12 (6.5%) | 45 (4.1%) | 0.140 |
| 3-month | 3 (4.3%) | 16 (3.0%) | 0.792 |
| 6-month | 2 (3.0%) | 13 (2.3%) | 1.000 |
| 12-month | 2 (3.8%) | 7 (1.8%) | 0.676 |
| 24-month | 1 (3.7%) | 5 (3.2%) | 1.000 |
| Ca (mg/dL) | |||
| Preoperative | 9.36±0.44 | 9.40±1.28 | 0.188 |
| 1-month | 9.20±0.52 | 9.24±0.56 | 0.529 |
| 3-month | 8.96±0.60 | 9.04±0.56 | 0.072 |
| 6-month | 8.96±0.56 | 9.08±0.56 | 0.050 |
| 12-month | 9.00±0.56 | 9.16±0.52 | 0.031* |
| 24-month | 9.04±0.60 | 9.08±0.56 | 0.778 |
| Ca <8.5 mg/dL | |||
| 1-month | 13 (6.8%) | 74 (6.6%) | 0.936 |
| 3-month | 23 (18.0%) | 85 (10.6%) | 0.016* |
| 6-month | 17 (14.3%) | 53 (7.4%) | 0.011* |
| 12-month | 12 (12.4%) | 33 (6.4%) | 0.040* |
| 24-month | 7 (13.2%) | 17 (8.1%) | 0.375 |
*, significantly statistical differences. BMI, body mass index; HD, Hashimoto’s disease; NG, nodular goiter; TNM, tumor node metastasis; PTH, parathyroid hormone; Ca, calcium.