Sensitivity analyses indicated that our time-series models were generally robust to model specifications. Significance : The exposure-response relationship between temperature and ambulance dispatches was similar with that between temperature and emergency room visits, suggesting ambulance service might be as a good health indicator as emergency room visit. 敏感性分析发现,本研究所运用的统计学模型较为稳健。意义:温度对救护车出车次数的暴露反应关系近似于医院急诊人次,提示救护车出车次数可能也是一种可靠的健康指标。