Table 3.

Confusion matrix for patients > 60 years accounting for the agreement of the classification of patients if their PTH values are below, above, or within normal values according to the previously established ranges (10–65 pg/mL) and according to the ranges defined in Table 2

(I)	New classification
	Under	Normal	Above	Total
Old classification
Under	56 (0.1%)	0 (0%)	0 (0%)	56 (0.1%)
Normal	2203 (3.92%)	46,931 (83.5%)	0 (0%)	49,134 (87.42%)
Above	0 (0%)	5357 (9.53%)	1658 (2.95%)	7015 (12.48%)
Total	2259 (4.02%)	52,288 (93.03%)	1658 (2.95%)	56,205 (100%)

(II)	New classification
	Under	Normal	Above	Total
Old classification
Under	45 (0.12%)	0 (0%)	0 (0%)	45 (0.12%)
Normal	1317 (3.47%)	32,513 (85.7%)	(0%)	33,830 (89.17%)
Above	0 (0%)	2976 (7.84%)	1087 (2.87%)	4063 (10.71%)
Total	1362 (3.59%)	35,489 (93.54%)	1087 (2.87%)	37,938 (100%)

(I) Patients over 60 years and 25OHD > 20 ng/mL (II) Patients over 60 years and 25OHD > 30 ng/mL