Table 2 Baseline characteristics of diabetic patients.

From: Why NHS hospital co-morbidity research may be wrong: how clinical coding fails to identify the impact of diabetes mellitus on cancer survival

Cohort

Variable

Uniquely Identified by HbA1c

Uniquely Identified by Coding

Universally Identified

All

Median Age (Years)

70–74

70–74

70–74

Median IMD

3

2

2

Percentage Female

41.45%

37.79%

41.51%

Breast

Median Age (Years)

65-69

75–79

70–74

Median IMD

2

2

2

Percentage Female

99.24%

98.21%

99.35%

Prostate

Median Age (Years)

70–74

75–79

70–74

Median IMD

3

3

3

  1. Comparison is made between the different manner in which they could be included in the hybrid diabetic defined cohort. Patients might be identified by coding but not HbA1c, HbA1c but not coding or identified universally (by both). Note that average age is represented as a range as per the source data.
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