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Table 6 Confusion Matrix for Dichotomized traditional Tönnis Classification System

From: Binary Tönnis classification: simplified modification demonstrates better inter- and intra-observer reliability as well as agreement in surgical management of hip pathology

Surgeon-Recommended Treatment

Observer 1

Observer 2

Observer 3

Observer 4

Observer 5

Preservation

Replacement

Preservation

Replacement

Preservation

Replacement

Preservation

Replacement

Preservation

Replacement

A: First Round of Reads

 Preservation

19

0

19

0

10

9

17

2

19

0

 Replacement

4

17

5

16

2

19

5

16

5

16

B: Second Round of Reads

 Preservation

19

0

18

1

14

5

19

0

18

1

 Replacement

3

18

5

16

3

18

4

17

5

16