Obesity-related hospitalizations have tripled from 1996 to 2009. In 2009, there were approximately 2.8 million hospital stays for which obesity was either a principal or secondary diagnosis. The share of obesity-related hospitalizations increased from 3% of all stays (excluding infants and maternal) in 1996 to more than 9% of all stays in 2009. Hospitalizations in which obesity was the principal diagnosis increased 13-fold from 10,100 in 1996 to 132,900 in 2009. Hospitalizations in which obesity was the secondary diagnosis increased from 766,600 in 1996 to 2,716,200 in 2009, a 3.5 fold increase.
Mean cost per stay for hospitalizations with obesity as a secondary diagnosis compared to no-obesity relationship was 9% higher in 2009 over 2004. Overall, hospital stays with any mention of obesity accounted for $33.4 billion (10.2%) of aggregate hospital costs in 2009.
The most common procedure for which obesity was the principal diagnosis was bariatric surgery, which was unchanged from 2004.
The most common procedure for which obesity was the secondary diagnosis was osteoarthritis, increasing by 27% from 2004. Coronary atherosclerosis was the most common principal diagnosis accounting for 6.8% of all stays in 2004. It decreased 37% to become the third most common diagnosis in 2009. Chronic obstructive pulmonary disease and bronchiectasis increased 34%, rising from the 14th most common procedure to the eighth.
The report is based on HCUP database, sponsored by the Agency for Healthcare Research and Quality. AHRQ: Adult Obesity Hospitalization Statistical Brief 137