Table 5.

Results of the multivariate multilevel analysis of the costs of AEs with clustering on hospital level and hospital department level

	All adverse events β	Preventable adverse events β
Intercept	366	289
Adverse event	4516	3521
Age	-11.2 *	-9.6 *
Sex	-3.3	-7.5
Admission type	-341	-506
Diagnostic groups (ICD9DE)
Endocrine, nutritional and metabolic diseases, and immunity disorders	-584	-568
Nervous system and sense organs	-474	-531
Circulatory system	-1735 *	-1727 *
Respiratory system	-1334 *	-1346 *
Digestive system	-1049 *	-986 *
Genitourinary system	-606	-608
Symptoms, signs and ill-defined conditions	-872 *	-909 *
Injury and poisoning	-1283 *	-1162 *
All other codes	-896 *	-898 *
Charlson index	-81	-81
Speciality	-676 *	-606 *

Dependent variable: costs of admission. Independent variables: age: continuous variable, sex: male as reference, admission type: non urgent as reference, diagnostic groups: neoplasms as reference, Charlson comorbidity index: continuous variable, speciality: non-surgical as reference