Table 3.
Comparison of postoperative parathyroid hormone, adjusted calcium levels, follow-up period, and recurrence rate between those who had normal PTH level 6 months after parathyroidectomy (group A) and those who had elevated PTH 6 months after parathyroidectomy (group B)
| Group A (n = 98) | Group B (n = 63) | P value | |
|---|---|---|---|
| Postoperative Day 1 PTH (pg/mL) | 19.7 ± 15.3* | 34.7 ± 73.8* | .795 |
| Postoperative 3-month PTH (pg/mL) | 40.2 ± 21.0+ | 91.1 ± 75.8+ | <.001 |
| Postoperative 6-month PTH (pg/mL) | 35.6 ± 13.3 | 90.1 ± 46.3 | <.001 |
| Postoperative 12-month PTH (pg/mL) | 40.1 ± 16.9* | 75.1 ± 53.1* | <.001 |
| Postoperative 24-month PTH (pg/mL) | 39.3 ± 19.0+ | 69.4 ± 48.4* | <.001 |
| Latest postoperative PTH level (pg/mL) | 38.6 ± 20.5+ | 67.8 ± 49.9* | <.001 |
| Postoperative Day 0 Ca level (mmol/L) | 2.56 ± 0.2 | 2.64 ± 0.2 | .011 |
| Postoperative Day 1 Ca level (mmol/L) | 2.35 ± 0.2 | 2.42 ± 0.2 | .021 |
| No. of patients requiring oral Oscal ± Rocaltrol supplements on discharge | 7 (7.1) | 3 (4.8) | .741 |
| Latest postoperative serum Ca level (mmol/L) | 2.25 ± 0.1 | 2.25 ± 0.1 | .486 |
| Drop in serum Ca from the highest preoperative level to 6-month postoperative level (%) | 19.1 ± 6.7 | 20.9 ± 7.5 | .107 |
| Follow-up period (months) | 39.9 ± 24.4 | 36.7 ± 22.6 | .318 |
| Biochemical recurrence (%) | 1 (1.0) | 1 (1.6) | 1.000 |
PTH parathyroid hormone, Ca adjusted Ca
* P value < .05 when compared with the relative postoperative 6-month PTH
+ P value > .05 when compared with the relative postoperative 6-month PTH