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Table 4 Agreement between SI – pT and TNM-pT for under- and over-treatment. Standard of reference: pT.

From: Indicators of breast cancer severity and appropriateness of surgery based on hospital administrative data in the Lazio Region, Italy

		Under treatment
		pT
		yes			no			tot
		n	col%	row%	n	col %	row%
SI	yes	55	*58,5*	*67,1*	27	11,3	32,9	82
	no	39	41,5	47,6	213	*88,8*	84,5	252
	tot	94	100,0		240	100,0		334
		pT
		yes			no			tot
		n	col%	row%	n	col %	row%
TNM	yes	91	*96,8*	*77,8*	26	10,8	22,2	117
	no	3	3,2	1,4	214	*89,2*	98,6	217
	tot	94	100,0		240	100,0		334
		Over treatment
		pT
		yes			no			tot
		n	col%	row%	n	col %	row%
SI	yes	15	*88,2*	*78,9*	4	1,3	21,1	19
	no	2	11,8	0,6	313	*98,7*	99,4	315
	tot	17	100,0		317	100,0		334
		pT
		yes			no			tot
		n	col%	row%	n	col %	row%
TNM	yes	17	*100,0*	*94,4*	1	0,3	5,6	18
	no	0	0,0	0,0	316	*99,7*	100,0	316
	tot	17	100,0		317	100,0		334

In bold are sensitivity (col% of yes), specificity (col% of no) and PPV (row% of yes)

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