Table 2 Comparison of postoperative PTH and serum calcium in CNs and control groups
Results | CN group | Control group | χ2(t/Z) value | P value |
|---|---|---|---|---|
Day one after surgery | ||||
 PTH (n, %) | ||||
  ≥ 15 pg/mL | 177/326 (54.3%) | 31/51 (60.8%) | χ2 = 0.751 | 0.386 |
  < 15 pg/mL | 149/326 (45.7%) | 20/51 (39.2%) | ||
∆PTH(%, \( \overline{x}\pm s \),) | (57.2 ± 28.6)% | (55.7 ± 27.8)% | Z = − 0.372 | 0.710 |
 Serum calcium (n, %) | ||||
  ≥ 2.1 mmol/L | 142/325 (43.7%) | 19/50 (38.0%) | χ2 = 0.573 | 0.449 |
  < 2.1 mmol/L | 183/325 (56.3%) | 31/50 (62.0%) | ||
1 month after surgery | ||||
 PTH (n, %) | ||||
  ≥ 15 pg/mL | 251/271 (92.6%) | 43/45 (95.6%) | χ2 = 0.160 | 0.689 |
  < 15 pg/mL | 20/271 (7.4%) | 2/45 (4.4%) | ||
 Serum calcium (n, %) | ||||
  ≥ 2.1 mmol/L | 275/312 (88.1%) | 32/40 (80.0%) | χ2 = 2.107 | 0.147 |
  < 2.1 mmol/L | 37/312 (11.9%) | 8/40 (20.0%) | ||
Half year after surgery | ||||
 PTH (n, %) | ||||
  ≥ 15 pg/mL | 300/311 (96.5%) | 49/50 (98.0%) | χ2 = 0.019 | 0.890 |
  < 15 pg/mL | 11/311 (3.5%) | 1/50 (2.0%) | ||
 Serum calcium (n, %) | ||||
  ≥ 2.1 mmol/L | 291/314 (92.7%) | 42/47 (89.4%) | χ2 = 0.250 | 0.617 |
  < 2.1 mmol/L | 23/314 (7.3%) | 5/47 (10.6%) | ||
Unintentional parathyroid removal (n, %) | Â | Â | Â | Â |
 No | 291/334 (87.1%) | 45/52 (86.5%) | χ2 = 0.014 | 0.907 |
 Yes | 43/334 (12.9%) | 7/52 (13.5%) | ||