[Changes in the average interval since last visit and the number of repeat outpatients in the Patient Survey of Japan].
[Changes in the average interval since last visit and the number of repeat outpatients in the Patient Survey of Japan].
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DOI：
10.11236/jph.64.10_619
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发表时间：
2017-01-01
期刊：
影响因子：
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通讯作者：
Imamura, Tomoaki
中科院分区：
文献类型：
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作者：
Kubo, Shinichiro;Noda, Tatsuya;Imamura, Tomoaki
目的患者调查提供了日本患者疾病和伤害统计的基本信息，并且可以使用该调查对疾病和伤害的患者人数进行估计。在本次调查中，重复就诊的门诊患者数量影响调查结果。自上次访视以来的平均间隔（AILV）和校正因子用于估计重复门诊患者的数量。AILV > 30天的患者不包括在调查中。然而，在过去几年中，AILV在许多情况下超过了30天，这表明目前的30天门槛不再合适。方法采用1996-2011年的患者调查数据，分析AILV阈值变化对患者重复门诊量的影响。结果大多数疾病和损伤患者的AILV增加。使用当前的30天阈值，总体门诊覆盖率从1996年的91%下降到2011年的78%。一个更高的AILV阈值是必要的，以保持整体门诊覆盖率。例如，90天的门槛使2011年的覆盖率提高到96%。然而，提高阈值显著增加了重复门诊患者的数量。例如，2011年重复门诊患者总数从目前30天阈值的4301万增加到90天阈值的7103万。结论AILV随时间的推移而增加，改变AILV阈值可明显增加复诊患者数和总患者数，提示有必要提高AILV阈值。
Objectives The Patient Survey provides basic information on disease and injury statistics of patients in Japan, and an estimation of the number of patients by disease and injury can be made using this survey. In this survey, the number of outpatients with repeat visits affects the survey results. The average interval since last visit (AILV) and a correction factor are used to estimate the number of repeat outpatients. Patients with AILV > 30 days are not included in the survey. However, in the last years, AILV exceeded 30 days in many cases, suggesting that the current 30-day threshold is no longer suitable. Thus, this study investigated the AILV in the current patient population and the effect of the increase in AILV on the number of repeat outpatients.Methods Patients Survey data of 1996-2011 were used to estimate the effect of changing the AILV threshold on the number of repeat outpatients.Results AILV increased for patients with most diseases and injuries. Using the current 30-day threshold, the overall outpatient coverage rate decreased from 91% in 1996 to 78% in 2011. A higher AILV threshold was necessary to maintain the overall outpatient coverage rate. For example, a threshold of 90 days increased the coverage rate in 2011 to 96%. However, raising the threshold markedly increased the number of repeat outpatients. For example, the overall number of repeat outpatients in 2011 increased from 43.01 million with the current 30-day threshold to 71.03 million using the 90-day threshold. The peak of the AILV of outpatients was observed on the next day after the first visit and the peak of the AILV of outpatients was observed every other week.Conclusion AILV increased over time and changing the AILV threshold markedly increased the number of repeat outpatients and total patients, indicating that there is a need to raise the AILV threshold.