National Hospital Ambulatory Medical Care Survey, 2003

The National Hospital Ambulatory Medical Care Survey
(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 2003 survey, data were collected from 236 OPDs
and 475 EDs. Among the variables included are age, race, and sex of
the patient, reason for the visit, physician's diagnoses, cause of
injury (EDs only), surgical procedures (OPDs only), medication
therapy, and expected source of payment. For 2003, additional updates
and revisions have been made to the drug characteristics data. The
variables CSTRATM and CPSUM have been added to assist in the
computation of variances.

美国国家医院门诊医疗护理调查（NHAMCS）提供的数据取自全国抽样医院中急诊科（EDs）和门诊部（OPDs）的患者记录样本。由此得出的全国估计值描述了美国医院门诊医疗服务的使用情况。2003年调查的数据来自236个门诊部和475个急诊科。纳入的变量包括患者的年龄、种族、性别、就诊原因、医生诊断、受伤原因（仅限急诊科）、外科手术（仅限门诊部）、药物治疗以及预期支付来源。2003年，对药物特征数据进行了额外更新与修订，并新增CSTRATM和CPSUM变量以辅助方差计算。