For patients age 40 and over with chronic obstructive pulmonary disease (COPD), hospital readmissions within 30 days of initial treatment were 30 percent higher among blacks than Hispanics or Asians and Pacific Islanders and about 9 percent higher than whites in 2008, according to the latest News and Numbers from the Agency for Healthcare Research and Quality.

Based on data for patients who were hospitalized with COPD in 15 states during 2008:

-- About 7 percent of patients were readmitted within 30 days principally for COPD, but 21 percent were readmitted for any health condition (all-cause readmission).

-- There were 190,700 initial hospital admissions specifically to treat COPD at an average cost of $7,100. The average readmission cost principally for COPD was 18 percent higher, at $8,400 per stay, but all-cause readmissions were 50 percent more expensive than the initial stay--$11,100.

-- Readmissions were 22 percent higher among patients from the poorest communities than among those from the highest income areas.

-- Readmissions were about 13 percent higher among male patients compared to females.