Bian John, Morrisey Michael A
Atlanta Veterans Affairs Medical Center, USA.
Inquiry. 2007 Summer;44(2):200-10. doi: 10.5034/inquiryjrnl_44.2.200.
This paper examines the association of free-standing ambulatory surgery centers (ASCs) with hospital surgery volume, using data from the 2002 Medicare Online Survey Certification and Reporting System and the American Hospital Association Annual Surveys of Hospitals. From 1993 to 2001, the number of ASCs per 100,000 population in metropolitan statistical areas (MSAs) increased by 150%. During the same period, hospital outpatient surgeries increased 28%, while inpatient surgeries decreased by 4.5%. MSA and year fixed-effects regression analyses suggest that an increase of one ASC per 100,000 people was associated with a 4.3% reduction in hospital outpatient surgical volume, but was not associated with inpatient surgical volume.
本文利用2002年医疗保险在线调查认证与报告系统以及美国医院协会医院年度调查的数据，研究了独立门诊手术中心（ASC）与医院手术量之间的关联。1993年至2001年期间，大都市统计区（MSA）每10万人口中的ASC数量增加了150%。同期，医院门诊手术量增加了28%，而住院手术量下降了4.5%。MSA和年份固定效应回归分析表明，每10万人中ASC增加一个，与医院门诊手术量减少4.3%相关，但与住院手术量无关。
