Harvey A L, Gerard W C, Rice G F, Finch H
Department of Emergency Medicine, Richland Memorial Hospital, Columbia, South Carolina, USA.
Prehosp Emerg Care. 1999 Jan-Mar;3(1):11-4. doi: 10.1080/10903129908958898.
To compare patients' perceptions of ambulance response times with the actual ambulance response times to aid quality assurance efforts in EMS management.
A convenience sample of patients presenting to an urban ED via EMS were asked a series of four questions pertaining to response time, scene time, time to definitive care, and their expectations of response time. These times were then compared with actual times from the EMS dispatch center. Times were analyzed using multivariate analysis of variance (MANOVA) followed by discriminant analysis.
There was a significant difference between the perceived and actual times for all three questions, by both multivariate analysis and univariate analysis (p < 0.0001). Patients tended to overestimate the actual response times (12.4 min vs 9.1 min) but underestimate the on-scene times (9.1 min vs 12.4 min) and times to definitive care (29.4 min vs 35.0 min).
Patients are inaccurate in their estimations of time. Response times are generally overestimated, while scene times and times to definitive care are underestimated. Actual response times often meet patients' expectations (mean 10.8 min), although the patients may not perceive that they have.
比较患者对救护车响应时间的认知与实际救护车响应时间，以协助紧急医疗服务（EMS）管理中的质量保证工作。
选取通过EMS送至城市急诊室（ED）的患者作为便利样本，询问他们一系列关于响应时间、现场时间、确定性治疗时间以及他们对响应时间期望的四个问题。然后将这些时间与EMS调度中心的实际时间进行比较。使用多变量方差分析（MANOVA），随后进行判别分析对时间进行分析。
通过多变量分析和单变量分析，所有三个问题的感知时间与实际时间之间均存在显著差异（p < 0.0001）。患者往往高估实际响应时间（12.4分钟对9.1分钟），但低估现场时间（9.1分钟对12.4分钟）和确定性治疗时间（29.4分钟对35.0分钟）。
患者对时间的估计不准确。响应时间通常被高估，而现场时间和确定性治疗时间被低估。实际响应时间通常符合患者的期望（平均10.8分钟），尽管患者可能并未意识到这一点。
