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Table 3 Cross tabulation between two examinations in single observer

From: An office-based fix-and-follow grading system assessing visual function in preverbal children

  Exam2 Total
2 3 4 5 6 7
Exam1
2 1 0 0 0 0 0 1
3 0 2 0 0 0 0 2
4 0 0 3 0 0 0 3
5 0 0 0 4 2 0 6
6 0 0 0 0 4 0 4
7 0 0 0 0 1 4 5
Total 1 2 3 4 7 4 21