the low level of preventable hospital admissions for asthma and chronic obstructive pulmonary diseases copd also tends to show that proper prevention and primary care interventions are in place panel c however some preventive practices are lagging avoidable hospital admissions for diabetes are comparatively high and vaccination rates for risky populations have declined oecdeu agesex standardised rate of adults aged years and over based on admission data defined daily doses are the assumed average doses per day for drugs used for its main indication in adults eg grams for oral aspirin they are constant across countries