Department of Emergency Medicine, University of Fukui Hospital, 23-3 Matsuoka Shimoaizuki, Eiheiji-cho, Yoshida-gun, Fukui, 910-1193, Japan.
Department of General Medicine, University of Fukui Hospital, 23-3 Matsuoka Shimoaizuki, Eiheiji-cho, Yoshida-gun, Fukui, 910-1193, Japan.
BMC Emerg Med. 2020 Oct 31;20(1):87. doi: 10.1186/s12873-020-00383-2.
Although the shock index is known to predict mortality and other severe outcomes, deriving it requires complex calculations. Subtracting the systolic blood pressure from the heart rate may produce a simple shock index that would be a clinically useful substitute for the shock index. In this study, we investigated whether the simple shock index was equivalent to the shock index.
This observational cohort study was conducted at 2 tertiary care hospitals. Patients who were transported by ambulance were recruited for this study and were excluded if they were aged < 15 years, had experienced prehospital cardiopulmonary arrest, or had undergone inter-hospital transfer. Pearson's product-moment correlation coefficient and regression equation were calculated, and two one-sided tests were performed to examine their equivalency.
Among 5429 eligible patients, the correlation coefficient between the shock index and simple shock index was extremely high (0.917, 95% confidence interval 0.912 to 0.921, P < .001). The regression equation was estimated as sSI = 258.55 log SI. The two one-sided tests revealed a very strong equivalency between the shock index and the index estimated by the above equation using the simple shock index (mean difference was 0.004, 90% confidence interval 0.003 to 0.005).
The simple shock index strongly correlated with the shock index.
虽然休克指数可用于预测死亡率和其他严重后果，但计算该指数较为复杂。从心率中减去收缩压可能会产生一个简单的休克指数，它可以作为休克指数的临床有用替代品。本研究旨在探讨简单休克指数是否等同于休克指数。
这是一项在 2 家三级护理医院进行的观察性队列研究。该研究纳入了通过救护车转运的患者，但排除了年龄 < 15 岁、经历过院前心肺复苏或进行院内转院的患者。计算了 Pearson 积差相关系数和回归方程，并进行了两次单边检验以检验其等效性。
在 5429 名符合条件的患者中，休克指数与简单休克指数之间的相关系数极高（0.917，95%置信区间为 0.912 至 0.921，P <.001）。回归方程估计为 sSI = 258.55 log SI。两次单边检验显示，休克指数与通过上述简单休克指数方程估计的指数之间具有很强的等效性（平均差值为 0.004，90%置信区间为 0.003 至 0.005）。
简单休克指数与休克指数具有很强的相关性。
