Calculate the percentage of potentially preventable hospitalisations (PPH) by dividing hospital admissions (number of visits and people admitted) relative to the patient diagnoses codes in hospital admissions data. PPH is reported using the broad categories of chronic, acute and vaccine preventable conditions and using age-standardized hospitalisation rates (the number of potentially preventable hospitalisations per 1 000 or 100 000 population or the number of hospital bed days per patients admitted for a potentially preventable hospitalization).