National Hospital Ambulatory Medical Care Survey, 2001

The NHAMCS provides data from samples of patient records
selected from emergency departments (EDs) and outpatient departments
(OPDs) of a national sample of hospitals. The resulting national
estimates describe the use of hospital ambulatory medical care
services in the United States. For the 2001 survey, data were
collected from 224 OPDs and 364 EDs. Among the variables included are
age, race, and sex of the patient, reason for the visit, physician's
diagnoses, cause of injury (ED only), surgical procedures (OPD only),
medication therapy, and expected source of payment.

国家医院门诊医疗调查（National Hospital Ambulatory Medical Care Survey，NHAMCS）提供了从全国抽样医院的急诊科（Emergency Departments，EDs）与门诊部（Outpatient Departments，OPDs）中选取的患者记录样本数据。由此得到的全国性估算结果，可用于描述美国医院门诊医疗服务的使用情况。在2001年的本次调查中，研究人员共从224家门诊部及364家急诊科采集了数据。本次调查涵盖的变量包括患者年龄、种族与性别、就诊原因、医师诊断结果、受伤原因（仅急诊科适用）、手术操作（仅门诊部适用）、药物治疗方案以及预期支付来源。