PTH and hyperparathyroidism: On examining possible differences in functional performance and normal parathyroid function or hyperparathyroidism (Table 2), differences were only observed in the mean SPPB score (8 ± 2.5 pg/mL in patients with normal PTH versus 7.2 ± 2.4 pg/mL in patients with hyperparathyroidism; p = 0.019).