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Table 1 Grades of (sub)optimal care given by the expert panel (in both groups allpatients are hypertensive)

From: The role of 'confounding by indication' in assessing the effect of quality of care on disease outcomes in general practice: results of a case-control study

    Cases Controls
    n % n %
Grading: 0 No sub-optimal factors have been identified 12 43 18 31
  1 Sub-optimal factor(s) have been identified, but are unlikely to be related to the occurrence of stroke in this patient 8 29 18 31
  2 Sub-optimal factor(s) have been identified, and possibly have failed to prevent the stroke in this patient 4 14 18 31
  3 Sub-optimal factor(s) have been identified, and are likely to have failed to prevent the stroke in this patient 4 14 4 7
Sub-optimal care   Grading 1, 2, 3 16 57 40 69
Total   Grading 0, 1, 2, 3 28 100 58 100
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