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Table 4 Hemoglobin A1c estimates by self-report and chronic condition warehouse diabetes status

From: Identifying diabetics in Medicare claims and survey data: implications for health services research

Clinical measures

Self-report, yes; Claims, yes

Self-report, yes; Claims, no

Self-report, no; Claims, yes

Self-report, no; Claims, no

Hemoglobin A1c (mean)

6.60 (0.05)

6.32 (0.03)

5.86 (0.04)

5.64 (0.02)

Hemoglobin A1cā€‰ā‰„ā€‰6.5 (%)

45.7 (2.4)

30.5 (0.5)

12.4 (2.2)

3.5 (0.6)

Hemoglobin A1cā€‰<ā€‰6.0 (%)

24.8 (2.5)

42.8 (2.9)

63.6 (2.6)

80.8 (1.4)

Sample size

406

34

162

1426

  1. Parenthetical entries are standard errors.
  2. Source: 2006 Health and Retirement Study; 2006 Medicare Beneficiary Annual Summary File.