Table 3.

Risk factors for fractures before and after surgery among cases with primary hyperparathyroidism

Risk factor	Before	After
Age (years)	1.02 (1.00 to 1.04)*	1.03 (1.02 to 1.05)*
Diagnosis (hyperplasia/adenoma)	0.90 (0.41 to 1.96)	1.15 (0.49 to 2.68)
Fracture before surgery (yes/no)	—	2.16 (1.34 to 3.48)*
Sex (male/female)	0.62 (0.34 to 1.12)	0.37 (0.21 to 0.64)*
Kidney stones before surgery (yes/no)	0.77 (0.44 to 1.33)	0.63 (0.33 to 1.21)
Weight of removed parathyroid tissue (g)	1.16 (0.73 to 1.85)	0.94 (0.80 to 1.10)

^*P<0.05 by Poisson regression.