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Table 3—

Bivariate and adjusted odds of accurately knowing one’s most recent HbA1c value

%Odds ratios (95% CI)
UnadjustedAdjusted for other patient characteristics
Race    
    White 27 Referent Referent 
    Black 19 0.65 (0.37–1.11) 0.51 (0.22–1.18) 
    Latino 0.23 (0.18–0.65) 0.51 (0.14–1.48) 
    Other 37 1.65 (0.84–3.25) 1.21 (0.55–2.67) 
Education    
    Less than high school Referent Referent 
    High school 22 3.49 (1.74–6.99) 2.37 (1.09–5.15) 
    Some college 36 6.91 (3.65–13.1) 3.72 (1.78–7.78) 
Annual income    
    <$10,000 13 Referent Referent 
    $10,001–30,000 20 1.62 (0.90–2.90) 1.11 (0.55–2.23) 
    >$30,000 40 4.39 (2.43–8.02) 1.81 (0.86–3.82) 
Diabetes duration    
    ≤3 years 25 Referent Referent 
    ≥4 years 26 1.10 (0.61–1.52) 1.32 (0.78–2.29) 
Medications    
    Oral only 26 Referent Referent 
    Insulin ± oral 21 0.75 (0.48–1.14) 0.87 (0.50–1.51) 
    No medications 30 1.22 (0.60–2.49) 0.82 (0.34–2.01) 
Health system    
    AMC 36 Referent Referent 
    VA 16 0.35 (0.23–0.53) 0.55 (0.33–0.92) 
    Inner-city 14 0.29 (0.16–0.52) 0.70 (0.26–1.89) 
Whether diabetes doctor answers questions fully    
    Did not strongly agree 21 Referent Referent 
    Strongly agree 30 1.55 (1.05–2.29) 1.60 (1.03–2.48) 
%Odds ratios (95% CI)
UnadjustedAdjusted for other patient characteristics
Race    
    White 27 Referent Referent 
    Black 19 0.65 (0.37–1.11) 0.51 (0.22–1.18) 
    Latino 0.23 (0.18–0.65) 0.51 (0.14–1.48) 
    Other 37 1.65 (0.84–3.25) 1.21 (0.55–2.67) 
Education    
    Less than high school Referent Referent 
    High school 22 3.49 (1.74–6.99) 2.37 (1.09–5.15) 
    Some college 36 6.91 (3.65–13.1) 3.72 (1.78–7.78) 
Annual income    
    <$10,000 13 Referent Referent 
    $10,001–30,000 20 1.62 (0.90–2.90) 1.11 (0.55–2.23) 
    >$30,000 40 4.39 (2.43–8.02) 1.81 (0.86–3.82) 
Diabetes duration    
    ≤3 years 25 Referent Referent 
    ≥4 years 26 1.10 (0.61–1.52) 1.32 (0.78–2.29) 
Medications    
    Oral only 26 Referent Referent 
    Insulin ± oral 21 0.75 (0.48–1.14) 0.87 (0.50–1.51) 
    No medications 30 1.22 (0.60–2.49) 0.82 (0.34–2.01) 
Health system    
    AMC 36 Referent Referent 
    VA 16 0.35 (0.23–0.53) 0.55 (0.33–0.92) 
    Inner-city 14 0.29 (0.16–0.52) 0.70 (0.26–1.89) 
Whether diabetes doctor answers questions fully    
    Did not strongly agree 21 Referent Referent 
    Strongly agree 30 1.55 (1.05–2.29) 1.60 (1.03–2.48) 

The multivariable logistic models included all the variables listed in the table and also adjusted for patients’ age, sex, number of outpatient visits, and having a regular doctor, none of which were associated with knowing one’s most recent HbA1c. Accurately knowing one’s last HbA1c was defined as accurately reporting (within a ±0.5 range) one’s last HbA1c value.

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