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. Author manuscript; available in PMC: 2015 Mar 16.
Published in final edited form as: Am J Surg. 2014 Dec 17;209(3):483–487. doi: 10.1016/j.amjsurg.2014.09.022

Table 1. Preoperative Demographics.

Preoperative demographics of patients with primary hyperparathyroidism and normal (Creatinine clearance > 60 mL/min) or impaired (Creatinine clearance < 60 mL/min) renal function. Standard error of the mean (SEM).

Normal (±SEM) Impaired (±SEM) P value
Patients 621 329
Age (years) 56 ± 0.4 72 ± 0.6 < 0.001
Female (%) 74 90 < 0.001
Creatinine clearance (mL/min) 88.1 ± 0.9 45.6 ± 0.6 < 0.001
Calcium (mg/dL) 11.0 ± 0.0 11.1 ± 0.0 0.248
Phosphate (mg/dL) 2.9 ± 0.1 2.9 ± 0.0 0.910
PTH(pg/mL) 122 ± 3 131 ± 4 0.082
25(OH)D(ng/mL) 29 ± 0.6 34 ± 1 < 0.001