Frailty and risk
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We appreciate the thoughtful commentary by Dr. Cesari  on our research paper exploring 28-day reattendance prediction tools after emergency department (ED) discharge . We agree with Dr Cesari regarding the counterintuitive nature of the results. However, we are no longer surprised by discovering ED discharge prediction instruments are less than ideal. Decades of research have still failed to identify a tool that has sufficient performance metrics for routine clinical use .
The original nomogram we developed was based on testing each variable in a non-summative fashion . It yielded predictive variables that in themselves are most likely composite measures of vulnerability, e.g. polypharmacy, the need for allied health facilitation of discharge. In our latest paper, we tested the effects of summing those variables not significant in the original nomogram into ordinal measures of frailty and comorbidity. We believe the non-contribution of frailty has three possible explanations. First, that whatever contribution frailty made to reattendance risk was already captured by the existing nomogram. Second, as Dr. Cesari argues, that the methodology we chose was too crude to capture its contribution. Or third, that the relationship between advancing frailty and reattendance is not a simple correlation. This is not impossible and in fact was the exact relationship we found between reattendance and cognitive impairment—the risk for those with no impairment and severe impairment were both lower than for those with moderate impairment. It may be that the high vulnerability of those with advanced frailty has already been recognised and protective community supports are in place for them, whereas those with less severe frailty are “slipping through the cracks”.
Glenn Arendts PhD on behalf of the co-authors.
Compliance with ethical standards
Conflict of interest
I declare no conflicts of interest.
This letter reports no participant data or original research findings that require ethics approval.
For this type of study formal consent is not required.
- 2.Gips E, Spilsbury K, Boecker C, Ng R, Arendts G (2018) Do frailty and comorbidity indices improve risk prediction of 28-day ED reattendance? Reanalysis of an ED discharge nomogram for older people. Aging Clin Exp Res 1:5–9Google Scholar