- Open Access
The rising incidence of severe sepsis based on administrative data — real change or coding-driven bias?
Critical Care volume 19, Article number: 393 (2015)
Rhee and colleagues conclude in their recent study  that a substantial fraction of the administrative data-based rise in the incidence of severe sepsis is due to a decreasing threshold of documentation/coding of several types of organ dysfunction (OD). The conclusion was based mostly on diverging rates of rise in code-based OD versus that based on conservative clinical criteria, being faster among the former, coupled with a slower drop in hospital mortality among the latter.
However, these findings do not preclude an actual rise in the incidence of severe sepsis as a key driver of the observed trends, with reduced peak severity of sepsis-associated OD over time, possibly related to increasingly timely and effective resuscitative interventions. Indeed, the investigators reported a clinical criteria-based rising incidence of shock (+29 %) versus concomitant drop (−27 %) of acute renal failure. The latter finding may indicate that evolving renal failure has become increasingly less severe than the study’s definition threshold, despite the marked rise in shock.
Finally, the slower decrease in hospital mortality among clinical criteria-based OD may alternatively represent a higher likelihood of in-hospital death among patients with more severe OD, while those with relatively less severe OD may be more likely to be discharged to a long-term care facility or hospice, shifting in part their location of death. The later proposition is supported by prior reports  and a recent study by Kumar et al.  showing that the absolute drop in severe sepsis-associated hospital mortality (12.3 %) was matched by a similar rise (11.6 %) in discharge to a long-term care facility or hospice.
Rhee C, Murphy MV, Li L, Platt R, Klompas M. Centers for Disease Control and Prevention Epicenters Program. Improving documentation and coding for acute organ dysfunction biases estimates of changing sepsis severity and burden: a retrospective study. Crit Care. 2015;19:338.
Hall WB, Willis LE, Medvedev S, Carson SS. The implications of long-term acute care hospital transfer practices for measures of in-hospital mortality and length of stay. Am J Respir Crit Care Med. 2012;185:53–7.
Kumar G, Kumar N, Taneja A, Kaleekal T, Tarima S, McGinley E, et al. Nationwide trends of severe sepsis in the 21st century (2000–2007). Chest. 2011;140:1223–31.
The author declares that he has no competing interests.
See related research by Rhee et al., http://www.ccforum.com/content/19/1/338
About this article
Cite this article
Oud, L. The rising incidence of severe sepsis based on administrative data — real change or coding-driven bias?. Crit Care 19, 393 (2015). https://doi.org/10.1186/s13054-015-1113-4
- Severe Sepsis
- Acute Renal Failure
- Organ Dysfunction
- Hospital Mortality
- Administrative Data