Hosp study of 2809 admissions, found 1+adverse events (AE) in 24%. Among 978 AE, 23% (222) were preventable; 32% (316) serious. Preventable AE occurred in 1/15 admissions (serious 1/100). Drug AE were most common (39%) https://t.co/gqty53ccyH https://t.co/GxDBoEhxeM