Table 3.
Characteristics of the patients in three matched groups: low PTH, SHPT, and medium PTH groups.
| Characteristic | Low PTH group (n = 547) | SHPT group (n = 547) | Medium PTH group (n = 547) | P value |
|---|---|---|---|---|
| Median age | 56.4 | 56,6 | 56.1 | <0.001 |
| (IQR)–year | 48.1–64.5 | 48.3–64.5 | 47.6–64.5 | |
| Male sex – no. (%) | 277 (50.6) | 277 (50.6) | 277 (50.6) | NA |
| Median dialysis vintage (IQR) –month | 51.3 | 50.9 | 49.7 | 0.026 |
| 17.0–86.1 | 21.2–86.1 | 16.1–86.8 | ||
| Diabetes – no. (%) | 131 (23.9) | 131 (23.9) | 131 (23.9) | NA |
| iPTH (pg/mL) | <0.001 | |||
| Mean ± SD | 55.5 ± 28.5 | 997.7 ± 452.6 | 297.1 ± 131.3 | |
| Median | 58.5 | 822.8 | 273.5 | |
| (IQR) | 31.6–79.8 | 693.2–1154.0 | 186.0–389.7 | |
| Calcium (mmol/L)* | 2.26 ± 0.23 | 2.30 ± 0.23 | 2.24 ± 0.22 | <0.001 |
| Phosphate (mmol/L)* | 1.66 ± 0.42 | 2.01 ± 0.41 | 1.77 ± 0.44 | <0.001 |
| Albumin (g/dL)* | 3.92 ± 0.33 | 3.92 ± 0.31 | 3.90 ± 0.37 | 0.498 |
| Hemoglobin (g/dL)* | 11.14 ± 1.12 | 11.10 ± 1.15 | 11.09 ± 1.22 | 0.064 |
* Means ± SD.
Low PTH group (iPTH <100 pg/mL); SHPT group (iPTH ≥600 pg/mL); Medium PTH group (iPTH 100–600 pg/mL).
iPTH, intact parathyroid hormone; IQR, interquartile range; NA, not applicable; SD, standard deviation; SHPT, secondary hyperparathyroidism.