Direct medical costs of adverse events in Dutch hospitals

Table 2 Comparison of patients with LMR data and all patients reviewed

Patient data	Total sample reviewed*	Total sample deceased patients**
Number of inpatient admissions	7889	3959
Number of admissions in university hospitals	1378	780
Mean age in years (sd)	57.5 (21.5)	73.0 (13.4)
Sex (% male)	49.0	53.8
Admission in days mean (SD/median)	8.5 (10.5/5.0)	12.4 (14.3/7.0)
Urgent admissions (%)	53.6	87.0
Admission department in %:
Surgery	24.1	11.7
Cardiology	12.9	13.0
Internal medicine	15.8	30.2
Orthopaedics	10.4	1.7
Neurology	7.5	12.3
Pulmonary disease	7.2	13.1
Ear, nose and throat	4.3	0.4
Urology	4.2	1.2
Other	13.6	16.4

* Psychiatric and obstetric patients and patients < 1 year were excluded. Day admissions were only excluded in the discharged patients. Figures were weighted for oversampling of deceased patients and of patients admitted to a university hospital.
** Psychiatric and obstetric patients and patients < 1 year were excluded. Figures were weighted for oversampling of deceased patients admitted to a university hospital.

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