Medical Diagnostic Tests: A Review of Test Anatomy, Phases, and Statistical Treatment of Data

Table 11

Performances metrics for body mass index (BMI) as an anthropometric marker for breast cancer.

Indicator	Cutoff–BMI (kg/m^2)
	19.5	22.5	25.5	29.5	32.5	35.5	38.5
TP (true positives)	100	96	87	67	43	25	13
FP (false positives)	200	176	117	24	3	1	0
TN (true negatives) off	0	24	83	176	197	199	200
FN (false negatives)	0	4	13	33	57	75	87
Se (sensitivity)	1	1	0.87	0.67	0.43	0.25	0.13
Sp (specificity)	0	0.10	0.42	0.88	0.99	0.99	1
PPV (positive predictive value)	0.33	0.40	0.43	0.74	0.94	0.96	1
NPV (negative predictive value)	n.a.	0.90	0.87	0.84	0.78	0.73	0.70
PLR (positive likelihood ratio)	1.00	1.10	1.49	5.58	28.7	50.0	n.a.
NLR (negative likelihood ratio)	n.a.	0.30	0.31	0.38	0.58	0.75	0.84
AI (accuracy index)	0.33	0.40	0.57	0.81	0.80	0.75	0.71
CUI+ (clinical utility index positive)	0.33	0.30	0.37	0.47	0.40	0.24	0.13
CUI− (clinical utility index negative)	n.a.	10	0.36	0.74	0.76	0.72	0.70