Patients classification System

tools for
Cost management

tools for
Quality management

tools for

4 Why to choose US

4 implementation


4 contact

4 Logic

4 diagnoses

4 procedures

4 inpatients

4 outpatients

4 insurance

4 readmissions

4 reoperations

4 complications

4 deaths

4 length of stay

4 day surgery

4 unjustified stays


If a patient is re-operated during the hospital stay for the same anatomical site or for a complication and if this re-operation was not foreseeable at the time of the previous operation, this is an unexpected and undesirable event.

As for any quality indicator (premature deaths, iatrogenic complications, potentially avoidable readmissions, etc.) all undesirable events cannot be avoided even with optimal care. Surgery is always associated to risks, which has to be analyzed with statistical tools. Thus, the quality of the operations is questionable if observed reoperations rate is higher than expected rates, computed in taking into account the case mix of eligible operations (4EXPECTED REoperation RATES). Analyzing the causes of potentially avoidable reoperations is recommended in this case, to understand how to improve the quality of surgical procedures.

Observed rate (RO1) Expected rate: average (RO0), minimal (RO0min), maximal (RO0max)

Rate ratio (RRO): observed rate (RO1) / expected rate (RO0).

If the rate ratio is greater than 1.2, it is recommended to conduct a detailed review of surgical records to analyze the causes of reoperations (4MEDICAL REVIEW)
If the rate ratio is lower than 0.8, it is a good result.

Statistical significance

A significantly lower than expected rate (RO1 < RO0min)
B not significantly different from RO1 (RO0min < RO1 < RO0max)
C significantly higher than expected rate (RO1 > RO0max).

SQLape s..r.l. 2014. Last update: 20.05.2014