National Survey of Ambulatory Surgery: 1994, 1995, 1996, and 2006

The National Survey of Ambulatory Surgery (NSAS) was first conducted during the years 1994, 1995, and 1996 in response to the dramatic increase in the number of ambulatory surgery centers during the 1980's and early 1990's. The purpose of the first three years of the NSAS was to collect data on ambulatory (outpatient) surgery procedures performed in hospitals and free-standing ambulatory surgery centers in the United States. General demographic data pertaining to age, sex, and race were collected. Additionally, the 1994-1996 NSAS collected data on hospital diagnoses, outpatient procedures, the type of anesthesia used during the aforementioned outpatient procedures, and the payment methods for the procedures. Following a ten year hiatus, the NSAS was once again conducted in 2006. This iteration of the survey expands on the previous years' data collections. Like the 1994-1996 NSAS, the 2006 NSAS collected general demographic information on age and sex along with data on hospital diagnoses, outpatient procedures, and the type of anesthesia used during outpatient procedures. The 2006 NSAS collected additional data on patient symptoms, types of insurance, various time measures related to the medical procedures, and multiple measures pertaining to the status and health of the patients.

门诊手术全国调查（National Survey of Ambulatory Surgery, NSAS）于1994、1995及1996年首次开展，旨在应对20世纪80年代至90年代初门诊手术中心数量激增的行业现状。NSAS首轮三年的调查旨在收集美国境内医院及独立门诊手术中心开展的门诊（非住院）手术相关数据，采集了与年龄、性别、种族相关的通用人口统计信息。此外，1994-1996年的NSAS还收集了医院诊断、门诊手术操作、上述门诊手术所使用的麻醉类型，以及手术付费方式等相关数据。在经历十年中断后，NSAS于2006年再次启动调查，本轮调查拓展了此前各轮的数据采集范畴。与1994-1996年的NSAS一致，2006年版调查同样收集了年龄、性别相关的通用人口统计信息，以及医院诊断、门诊手术操作、门诊手术所用麻醉类型等数据；同时额外采集了患者症状、保险类型、与医疗操作相关的各类时间指标，以及多项与患者健康及身体状况相关的指标。