Table 2.

Comparison of demographics (Groups 1, 2 and 3) and postoperative histopathology of excised parathyroid tissue (Groups 1 and 2 only)

Variable	Group 1 pHPT and SF	Group 2 pHPT and NSF	Group 3 ISF	p value
n	65	65	65
Median age, y (range)*	54(18-89)	57(26-81)	59(19-88)	0.27
M:F ratio**	34F:31M	35F:30M	35F:30M	0.98
Parathyroid
Pathology	58 adenoma
		60 adenoma
	6 hyperplasia	5 hyperplasia
	1 normal

^*Kruskal Wallis ANOVA,

^**X² = 0.041, 2 degrees of freedom