Evaluation of UK Integrated Care Pilots: research protocol

[i] The above table contains all conditions and codes listed in Purdy et al. (2009) tables 3 and 4 except the following:

• ‘Failure to thrive’ and ‘low birth weight’ are excluded as they are purely paediatric conditions.

• ‘Angina’ codes R073, R074, Z034, Z035 are generic chest pain codes which are unlikely to indicate ischaemic heart disease.

• E139 and E149 not included in ‘diabetes complications’ as both codes specify ‘...without complications’.

• Mental health admissions (with the exception of ‘dementia’) are excludes as they are not relevant to the evaluation sites that are collecting admission data. The excluded conditions are ‘deliberate self-harm’, ‘neuroses’ and ‘schizophrenia’. ‘Dementia’ is relevant to two pilot sites, and so is retained.

• ‘Stroke’ is excluded because of the substantial change seen in the admission criteria for stroke over the study period.

• O15 is excluded from ‘convulsions and epilepsy’ as the condition—eclampsia (a specific disorder of pregnancy)—is unrelated, except for the common symptom of fits.

• There are also some additional codes included:

  • I129, I139, I132 and A082 are introduced by the process of converting the AHRQ codes from ICD-9CM to ICD-10.

  • All cystitis codes (N30) are included in ‘urinary tract infection’, supplementing N300, N308 and N309.