
Patients
classification System 
tools for 
tools for 
tools for 
4 ANECDOTE 4 contact 
4 Logic 
4 deaths 

IATROGENIC COMPLICATIONS 
INTERPRETATION As for any quality indicator
all undesirable events cannot be avoided even with optimal care. Hospital
medicine is always associated to risks, which has to be analyzed with
statistical tools. Thus, the quality is questionable if observed
complications rate is higher than expected rates, computed in taking into
account the case mix of eligible discharges Complication excess (d_{CP}) is given by the difference between observed (CP_{1})
and expected complication rates (CP_{0}): d_{CP} = CP_{1}CP_{0.
} An excess of complication might
reflect a greater propensity to code them all, including mild complications
such as redness of the skin. In such cases, we should not observe a
lengthening of the stay. A length of stay excess is observed when lengths of
stay exceed expected ones more among complicated cases than uncomplicated
ones. with
complications without
complications Observed length of stay LS_{1C} LS_{1}_{Æ} Expected length of stay LS_{0C} LS_{0}_{Æ} Length of stay excess d_{LS} = (LS_{1C} – LS_{0C})  (LS_{1}_{Æ} – LS_{0}_{Æ}). All excess are expressed in
positive values; if negative, they are equalized to zero. Observed rate (CP_{1}) Expected rate (average (CP_{0}),
minimal (CP_{0min}), maximal (CP_{0max}) Rate ratio (R_{CP}):
observed rate (CP_{1}) / expected rate (CP_{0}) Results A (good) rate ratio < 0.8
and significantly lower than expected rate (CP_{1} < CP_{0min})
and no length of stay excess (d_{LS}= 0) 

© SQLape s.à.r.l. and Yves Eggli, 2014. Last update: 20.05.2014 