Kunihito Nishikawa1,2, Ken Takahashi3, Ryoji Yamada4, Tsuyoshi Kinaga4, Matsumoto Masato4, Masayuki Yamamoto4. 1. Center of Medical Checkup, Shinko Hospital, 1-4-47 Wakinohamacho, Chuo-ku, Kobe, 651-0072, Japan. nishikawa.kyyh@gmail.com. 2. Department of Environmental Epidemiology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan. nishikawa.kyyh@gmail.com. 3. Department of Environmental Epidemiology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, 807-8555, Japan. 4. Center of Medical Checkup, Shinko Hospital, 1-4-47 Wakinohamacho, Chuo-ku, Kobe, 651-0072, Japan.
Abstract
BACKGROUND: Little is known concerning the risk of hospitalization and the risk of death before receiving dialysis by the stage of chronic kidney disease (CKD) in Japan. METHODS: The subjects comprised a total of 13,911 Japanese men (mean age 49.2 ± 9.9 years). Based on the results of a health checkup performed in 2006, they were divided into 5 groups according to their estimated glomerular filtration rate (GFR) levels and dialysis status: GFR ≥60, 45-59, 30-44, <30 mL/min/1.73 m2, and undergoing dialysis. From 2006 through to 2013, we investigated their hospitalization, dialysis initiation, and cause-specific death. The adjusted hazard ratios (HRs) for each end point were calculated compared with the GFR ≥60 mL/min/1.73 m2 group using a Cox proportional hazard model. RESULTS: A lower GFR was independently associated with higher risks of overall hospitalization, dialysis initiation, and all-cause death. In particular, the HRs for long-term hospitalization (≥1 month a year), dialysis, and cardiovascular disease (CVD) death markedly increased along with a decreased GFR. The rate ratios of dialysis to all-cause death (calculated based on the incidences of dialysis and death per 1000 person-years) were 0.03 (0.11 vs. 3.19), 0.08 (0.29 vs. 3.62), 0.51 (12.5 vs. 24.7), and 4.50 (179.8 vs. 40.0) for GFR ≥60, 45-59, 30-44, and <30 mL/min/1.73 m2, respectively. CONCLUSION: In Japanese men, although the risk of CVD death before dialysis initiation can never be ignored, CKD patients aged <60 years with a GFR of <30 mL/min/1.73 m2 are more likely to undergo dialysis prior to death.
BACKGROUND: Little is known concerning the risk of hospitalization and the risk of death before receiving dialysis by the stage of chronic kidney disease (CKD) in Japan. METHODS: The subjects comprised a total of 13,911 Japanese men (mean age 49.2 ± 9.9 years). Based on the results of a health checkup performed in 2006, they were divided into 5 groups according to their estimated glomerular filtration rate (GFR) levels and dialysis status: GFR ≥60, 45-59, 30-44, <30 mL/min/1.73 m2, and undergoing dialysis. From 2006 through to 2013, we investigated their hospitalization, dialysis initiation, and cause-specific death. The adjusted hazard ratios (HRs) for each end point were calculated compared with the GFR ≥60 mL/min/1.73 m2 group using a Cox proportional hazard model. RESULTS: A lower GFR was independently associated with higher risks of overall hospitalization, dialysis initiation, and all-cause death. In particular, the HRs for long-term hospitalization (≥1 month a year), dialysis, and cardiovascular disease (CVD) death markedly increased along with a decreased GFR. The rate ratios of dialysis to all-cause death (calculated based on the incidences of dialysis and death per 1000 person-years) were 0.03 (0.11 vs. 3.19), 0.08 (0.29 vs. 3.62), 0.51 (12.5 vs. 24.7), and 4.50 (179.8 vs. 40.0) for GFR ≥60, 45-59, 30-44, and <30 mL/min/1.73 m2, respectively. CONCLUSION: In Japanese men, although the risk of CVD death before dialysis initiation can never be ignored, CKDpatients aged <60 years with a GFR of <30 mL/min/1.73 m2 are more likely to undergo dialysis prior to death.
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