Table 2.

Basic statistics

Basic statistics	Group B	Group C	Group A	Significance
Total number of parathyroid glands with	244	188	432
Disease found at surgery	68	52	120
No disease found at surgery	176	136	312
Total number of sides with	122	94	216
Disease found at surgery	65	49	114
No disease found at surgery	57	45	102
Total no. patients	61	47	108
Mean age at diagnosis	59.49	57.47	58.67
Standard deviation from the mean	12.56	12.89	12.69
Male patients	17	11	28
Mean age at diagnosis	59.53	52.55	56.79	n.s
Standard deviation from the mean	11.66	17.25	14.24
Female patients	44	36	80
Mean age at diagnosis	59.61	58.97	59.33	n.s
Standard deviation from the mean	13.03	11.10	12.13