Updated Kimura-Takemoto classification of atrophic gastritis

Table 1 Sensitivity and specificity of the Updated Sydney system

Measure	Atrophy class
	Mild	Moderate	Severe
Sensitivity	25%	36%	42%
Specificity	100%	100%	100%
Patients with atrophy by the reference method, n	8	36	121
Patients with atrophy by the Updated Sydney system, n	2	13	51
Pseudo-negative results by the Updated Sydney system, n	6	23	70

Table 2 Structure of atrophic gastritis according to the Updated Sydney system, n (%)

Atrophy class, patients	Biopsy count
	1	2
Mild, n = 2	1 (0.6)	2 (1.2)
Moderate, n = 13	9 (5.5)	13 (7.9)
Severe, n = 51	28 (17.0)	51 (31.0)

Table 3 Structure of atrophic gastritis according to the Updated Kimura-Takemoto classification system, n (%)

	Biopsy count
Atrophy class, patients	1	≤ 2	≤ 3	≤ 4	≤ 5
Mild, n = 8	2 (1.2)	5 (3.0)	6 (3.6)	7 (4.2)	8 (4.8)
Moderate, n = 36	21 (12.7)	27 (16.4)	30 (18.2)	34 (20.6)	36 (21.8)
Severe, n = 121	40 (24.0)	79 (48.0)	96 (58.0)	109 (66.0)	121 (73.4)

Table 4 Structure of the atrophy types according to the Updated Kimura-Takemoto classification system

Type of gastric atrophy	Patients, n	Patients (%)
Sequential uniform type	46	28
Sequential non-uniform type	11	7
Diffuse uniform type	38	23
Diffuse non-uniform type	40	24
"Alternating atrophic – non-atrophic"	30	18
Total	165	100