Infection-related hospitalizations in older patients with ESRD

Lorien Dalrymple, Kirsten L. Johansen, Glenn M. Chertow, Su Chun Cheng, Barbara Grimes, Ellen B Gold, George Kaysen

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

Background: Infection is an important cause of hospitalization and death in patients receiving dialysis. Few studies have examined the full range of infections experienced by dialysis patients. The purpose of this study is to examine types, rates, and risk factors for infection in older persons starting dialysis therapy. Study Design: Retrospective observational cohort study. Setting & Participants: The cohort was assembled from the US Renal Data System and included patients aged 65-100 years who initiated dialysis therapy between January 1, 2000, and December 31, 2002. Exclusions included prior kidney transplant, unknown dialysis modality, or death, loss to follow-up, or transplant during the first 90 days of dialysis therapy. Patients were followed up until death, transplant, or study end on December 31, 2004. Predictors: Baseline demographics, comorbid conditions, and serum albumin and hemoglobin levels. Outcomes & Measurements: Infection-related hospitalizations were ascertained using discharge International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) codes. Hospitalization rates were calculated for each type of infection. The Wei-Lin-Weissfeld model was used to examine risk factors for up to 4 infection-related events. Results: 119,858 patients were included, 7,401 of whom were on peritoneal dialysis therapy. During a median follow-up of 1.9 years, infection-related diagnoses were observed in approximately 35% of all hospitalizations. Approximately 50% of patients had at least 1 infection-related hospitalization. Rates (per 100 person-years) of pulmonary, soft-tissue, and genitourinary infections ranged from 8.3-10.3 in patients on peritoneal dialysis therapy and 10.2-15.3 in patients on hemodialysis therapy. Risk factors for infection included older age, female sex, diabetes, heart failure, pulmonary disease, and low serum albumin level. Limitations: Use of ICD-9-CM codes, reliance on Medicare claims to capture hospitalizations, use of the Medical Evidence Form to ascertain comorbid conditions, and absence of data for dialysis access. Conclusion: Infection-related hospitalization is frequent in older patients on dialysis therapy. A broad range of infections, many unrelated to dialysis access, result in hospitalization in this population.

Original languageEnglish (US)
Pages (from-to)522-530
Number of pages9
JournalAmerican Journal of Kidney Diseases
Volume56
Issue number3
DOIs
StatePublished - Sep 2010

Fingerprint

Chronic Kidney Failure
Hospitalization
Dialysis
Infection
International Classification of Diseases
Peritoneal Dialysis
Transplants
Serum Albumin
Therapeutics
Kidney
Soft Tissue Infections
Medicare
Information Systems
Lung Diseases
Observational Studies
Renal Dialysis
Cause of Death
Hemoglobins
Cohort Studies
Heart Failure

Keywords

  • Dialysis
  • epidemiology
  • infection
  • kidney failure

ASJC Scopus subject areas

  • Nephrology
  • Medicine(all)

Cite this

Infection-related hospitalizations in older patients with ESRD. / Dalrymple, Lorien; Johansen, Kirsten L.; Chertow, Glenn M.; Cheng, Su Chun; Grimes, Barbara; Gold, Ellen B; Kaysen, George.

In: American Journal of Kidney Diseases, Vol. 56, No. 3, 09.2010, p. 522-530.

Research output: Contribution to journalArticle

Dalrymple, Lorien ; Johansen, Kirsten L. ; Chertow, Glenn M. ; Cheng, Su Chun ; Grimes, Barbara ; Gold, Ellen B ; Kaysen, George. / Infection-related hospitalizations in older patients with ESRD. In: American Journal of Kidney Diseases. 2010 ; Vol. 56, No. 3. pp. 522-530.
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abstract = "Background: Infection is an important cause of hospitalization and death in patients receiving dialysis. Few studies have examined the full range of infections experienced by dialysis patients. The purpose of this study is to examine types, rates, and risk factors for infection in older persons starting dialysis therapy. Study Design: Retrospective observational cohort study. Setting & Participants: The cohort was assembled from the US Renal Data System and included patients aged 65-100 years who initiated dialysis therapy between January 1, 2000, and December 31, 2002. Exclusions included prior kidney transplant, unknown dialysis modality, or death, loss to follow-up, or transplant during the first 90 days of dialysis therapy. Patients were followed up until death, transplant, or study end on December 31, 2004. Predictors: Baseline demographics, comorbid conditions, and serum albumin and hemoglobin levels. Outcomes & Measurements: Infection-related hospitalizations were ascertained using discharge International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) codes. Hospitalization rates were calculated for each type of infection. The Wei-Lin-Weissfeld model was used to examine risk factors for up to 4 infection-related events. Results: 119,858 patients were included, 7,401 of whom were on peritoneal dialysis therapy. During a median follow-up of 1.9 years, infection-related diagnoses were observed in approximately 35{\%} of all hospitalizations. Approximately 50{\%} of patients had at least 1 infection-related hospitalization. Rates (per 100 person-years) of pulmonary, soft-tissue, and genitourinary infections ranged from 8.3-10.3 in patients on peritoneal dialysis therapy and 10.2-15.3 in patients on hemodialysis therapy. Risk factors for infection included older age, female sex, diabetes, heart failure, pulmonary disease, and low serum albumin level. Limitations: Use of ICD-9-CM codes, reliance on Medicare claims to capture hospitalizations, use of the Medical Evidence Form to ascertain comorbid conditions, and absence of data for dialysis access. Conclusion: Infection-related hospitalization is frequent in older patients on dialysis therapy. A broad range of infections, many unrelated to dialysis access, result in hospitalization in this population.",
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AU - Dalrymple, Lorien

AU - Johansen, Kirsten L.

AU - Chertow, Glenn M.

AU - Cheng, Su Chun

AU - Grimes, Barbara

AU - Gold, Ellen B

AU - Kaysen, George

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N2 - Background: Infection is an important cause of hospitalization and death in patients receiving dialysis. Few studies have examined the full range of infections experienced by dialysis patients. The purpose of this study is to examine types, rates, and risk factors for infection in older persons starting dialysis therapy. Study Design: Retrospective observational cohort study. Setting & Participants: The cohort was assembled from the US Renal Data System and included patients aged 65-100 years who initiated dialysis therapy between January 1, 2000, and December 31, 2002. Exclusions included prior kidney transplant, unknown dialysis modality, or death, loss to follow-up, or transplant during the first 90 days of dialysis therapy. Patients were followed up until death, transplant, or study end on December 31, 2004. Predictors: Baseline demographics, comorbid conditions, and serum albumin and hemoglobin levels. Outcomes & Measurements: Infection-related hospitalizations were ascertained using discharge International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) codes. Hospitalization rates were calculated for each type of infection. The Wei-Lin-Weissfeld model was used to examine risk factors for up to 4 infection-related events. Results: 119,858 patients were included, 7,401 of whom were on peritoneal dialysis therapy. During a median follow-up of 1.9 years, infection-related diagnoses were observed in approximately 35% of all hospitalizations. Approximately 50% of patients had at least 1 infection-related hospitalization. Rates (per 100 person-years) of pulmonary, soft-tissue, and genitourinary infections ranged from 8.3-10.3 in patients on peritoneal dialysis therapy and 10.2-15.3 in patients on hemodialysis therapy. Risk factors for infection included older age, female sex, diabetes, heart failure, pulmonary disease, and low serum albumin level. Limitations: Use of ICD-9-CM codes, reliance on Medicare claims to capture hospitalizations, use of the Medical Evidence Form to ascertain comorbid conditions, and absence of data for dialysis access. Conclusion: Infection-related hospitalization is frequent in older patients on dialysis therapy. A broad range of infections, many unrelated to dialysis access, result in hospitalization in this population.

AB - Background: Infection is an important cause of hospitalization and death in patients receiving dialysis. Few studies have examined the full range of infections experienced by dialysis patients. The purpose of this study is to examine types, rates, and risk factors for infection in older persons starting dialysis therapy. Study Design: Retrospective observational cohort study. Setting & Participants: The cohort was assembled from the US Renal Data System and included patients aged 65-100 years who initiated dialysis therapy between January 1, 2000, and December 31, 2002. Exclusions included prior kidney transplant, unknown dialysis modality, or death, loss to follow-up, or transplant during the first 90 days of dialysis therapy. Patients were followed up until death, transplant, or study end on December 31, 2004. Predictors: Baseline demographics, comorbid conditions, and serum albumin and hemoglobin levels. Outcomes & Measurements: Infection-related hospitalizations were ascertained using discharge International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) codes. Hospitalization rates were calculated for each type of infection. The Wei-Lin-Weissfeld model was used to examine risk factors for up to 4 infection-related events. Results: 119,858 patients were included, 7,401 of whom were on peritoneal dialysis therapy. During a median follow-up of 1.9 years, infection-related diagnoses were observed in approximately 35% of all hospitalizations. Approximately 50% of patients had at least 1 infection-related hospitalization. Rates (per 100 person-years) of pulmonary, soft-tissue, and genitourinary infections ranged from 8.3-10.3 in patients on peritoneal dialysis therapy and 10.2-15.3 in patients on hemodialysis therapy. Risk factors for infection included older age, female sex, diabetes, heart failure, pulmonary disease, and low serum albumin level. Limitations: Use of ICD-9-CM codes, reliance on Medicare claims to capture hospitalizations, use of the Medical Evidence Form to ascertain comorbid conditions, and absence of data for dialysis access. Conclusion: Infection-related hospitalization is frequent in older patients on dialysis therapy. A broad range of infections, many unrelated to dialysis access, result in hospitalization in this population.

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KW - epidemiology

KW - infection

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