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KMID : 0613620150350040095
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Health Social Welfare Review
2015 Volume.35 No. 4 p.95 ~ p.115
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Effects of Hospital’s Characteristics on the Length of Stay in Middle-aged Gonarthrosis Inpatients
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Lee Geun-Woo
Son Ye-Jin
Lee Kwang-Soo
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Abstract
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This study purposed to analyze the effects of characteristics of hospitals on the length of stay in mid-aged gonarthrosis inpatients after controlling the differences of patients’ risks among hospitals. HIRA-NPS (Health Insurance Review &Assessment Service-National Patient Sample) data in 2011 was used. International classification of Disease-10 (ICD-10) codes, M17.0, M17.1, M17.2, M17.3, M17.4, M17.5, and M17.9 were applied to define gonarthrosis inpatients, and found 7,094 inpatients in 72 of general hospitals and 170 of hospitals. Age, gender, insurance type, Elixhauser comorbidity index, and surgery status of gonarthrosis inpatients were included in the risk-adjustment model. Hospital haracteristics such as number of doctors per 100 beds, bed size, hospital region, internal-herfindahl index, and number of gonarthrosis patients were included in the analysis model. All variables included in the risk-adjustment model were statistically significant and they had positive relationships with the length of stay. Number of beds >=300 (reference:<300) had significant positive relationship with the risk-adjusted hospital length of stay. Number of doctors per 100 beds and number of gonarthrosis patients had significant negative relationship. Study results provided that hospitals had differed length of stay in gonarthrosis inpatients depending on the organizational characteristics. Policy and management interventions will be needed to reduce the size of variation and to reduce the length of stay.
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KEYWORD
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Gonarthrosis, Length of Stay, Risk-Adjustment, Elixhauser Comorbity Index, , Internal Herfindahl Index
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