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Each admission included details of date of birth, gender, ethnicity, ICD principal diagnosis code, occupation, place of residence, dates of attendance, admission and discharge and a unique identifier.
Patients with the analysis-relevant complications were identified by a principal diagnosis code (Table 1) using International Classification of Diseases (ICD-9) codes [ 19].
Using the principal diagnosis code (ICD-9-CM codes 250.0 250.9, diabetes mellitus) and the associated census-tract numbers, we mapped 7,727 cases of diabetes.
*** Cost were taken from the 2011 hospitalization rates for Piedmont: DRG 267 with principal diagnosis code 07811 and intervention code 4904.
Hospitalisation due to asthma was coded dichotomously (as occurrence and non-occurrence of event), using the principal diagnosis code for hospitalisation, through 1-year after the index date for both the exposed and unexposed.
Data were also requested on the admitting hospital, patient's age, principal diagnosis code (international classification of diseases (ICD -10) and outcome ICD -10e candgoutcomedincharged alive, died or censored.
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Only principal diagnosis codes were considered.
They are based on ICD-10 principal diagnosis codes [ 36].
Stroke separations may be identified via ICD-10.5-AM principal diagnosis codes and AR-DRG codes.
Data were extracted by their assigned principal diagnosis codes classified according to the International Classification of Diseases (ICD) codes.
21 22 23 We identified hypoglycemia on the basis of ICD-9 principal diagnosis codes of 251.0, 251.1, or 251.2.
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