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[EARLY IN-HOSPITAL MORTALITY IN INTERNAL MEDICINE WARDS (WITHIN 24 HOURS): A POTENTIAL QUALITY INDICATOR OR A VARIABLE AFFECTED BY MULTIPLE FACTORS?]

Harefuah 2017 April
AIMS: To evaluate in-hospital mortality rate within 24 hours in internal medicine wards and to evaluate if it may be used as quality indicator.

BACKGROUND: In-hospital mortality rate is an outcome measure which apparently reflects quality of care. There are debates on whether it may be considered a quality indicator since it is difficult to compare different case-mixes between hospitals. Research on mortality within 24 hours had not been published.

METHODS: An historical prospective study was conducted including the entire internal wards admissions to the Rabin Medical Center between 1/7/14 and 30/6/15. We evaluated inhospital deaths and 7 days post discharge deaths. We focused on deaths within 24 hours, patients' characteristics, the primary diagnosis (which we assumed is the cause of death) and co-morbidity. The analysis includes descriptive statistics and mortality rates performed with SPSS version 22.

RESULTS: Overall, 25,414 patients were admitted to internal wards during the study period. There were 1,620 in-hospitals deaths (6.37%) among which 164 deaths occurred within 24 hours (0.65%), which is 10.1% of in-hospital deaths. These patients were very old (median 82), many were residents of nursing homes and nearly all were brought to the hospital by ambulance. The most frequent primary diagnoses were sepsis (24%), pneumonia (22%), metastatic cancer (10%) and acute neurologic event (5%).

CONCLUSIONS: The results exclude excessive inhospital mortality within 24 hours. The patients' characteristics enable researchers to assume that these deaths were expected and not preventable.

DISCUSSION: There is no excessive mortality within 24 hours, the deaths were expected and a seasonal modifying effect was evident. All this and the different case mix in between hospitals suggest that early in-hospital mortality seems inadequate as a quality measure.

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