Background: Hgb A1c levels may be higher in persons without ... 31st 2011 and one or more Hgb A1c report present in their chart during that time interval. Residential postal codes were used ...

If multiple measurements of Hgb A1c were present, we used the last Hgb A1c; covariates measured concurrent with the last Hgb A1c test or at the closest date were used in the analysis. Family ...