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Article: Institutional risk factors for norovirus outbreaks in Hong Kong elderly homes: A retrospective cohort study

TitleInstitutional risk factors for norovirus outbreaks in Hong Kong elderly homes: A retrospective cohort study
Authors
Issue Date2011
Citation
BMC Public Health, 2011, v. 11 How to Cite?
AbstractBackground: Most of the institutional outbreaks of norovirus in Hong Kong occur in elderly homes, the proportion being 69% in 2006. Residents in elderly homes are a special population seriously affected by norovirus infections, it is necessary to investigate the risk factors of the norovirus outbreaks in Hong Kong elderly homes at the facility level. Methods. A cohort of 748 elderly homes was followed up from January 2005 to December 2007; each elderly home was treated as one observation unit and the outcome event was the norovirus outbreak. Cox regression models were fitted to estimate the rate ratio (RR) and 95% confidence interval (CI) for the potential risk factors. Results: A total of 276 norovirus outbreaks were confirmed during the study period; the outbreak rate was 12.2 (95% CI: 9.9-14.6) per 100 home-years; elderly homes with a larger capacity (RR = 1.4, 95% CI: 1.3-1.5 (per 30-resident increment)), a higher staff-to-resident ratio (RR = 1.2, 95% CI: 1.1-1.3 (per 1/30 increment) and better wheelchair accessibility (RR = 2.0, 95% CI: 1.3-3.2) were found to have an elevated norovirus outbreak rate in Hong Kong elderly homes; Elderly homes with partitions between beds had a lower rate of norovirus outbreaks (RR = 0.6, 95% CI: 0.4-0.8). Conclusions: Elderly home capacity, staff-to-resident ratio and wheelchair accessibility were risk factors for norovirus outbreaks in Hong Kong elderly homes. Partitions between beds were a protective factor of norovirus outbreaks. These results should be considered in the infection control in Hong Kong elderly homes. © 2011 Lin et al; licensee BioMed Central Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/207024

 

DC FieldValueLanguage
dc.contributor.authorLin, Hualiang-
dc.contributor.authorNg, Sammy-
dc.contributor.authorChan, Shelley-
dc.contributor.authorChan, Waiman-
dc.contributor.authorLee, Krystal Chi Kei-
dc.contributor.authorHo, Suzanne-
dc.contributor.authorTian, Linwei-
dc.date.accessioned2014-12-09T04:31:16Z-
dc.date.available2014-12-09T04:31:16Z-
dc.date.issued2011-
dc.identifier.citationBMC Public Health, 2011, v. 11-
dc.identifier.urihttp://hdl.handle.net/10722/207024-
dc.description.abstractBackground: Most of the institutional outbreaks of norovirus in Hong Kong occur in elderly homes, the proportion being 69% in 2006. Residents in elderly homes are a special population seriously affected by norovirus infections, it is necessary to investigate the risk factors of the norovirus outbreaks in Hong Kong elderly homes at the facility level. Methods. A cohort of 748 elderly homes was followed up from January 2005 to December 2007; each elderly home was treated as one observation unit and the outcome event was the norovirus outbreak. Cox regression models were fitted to estimate the rate ratio (RR) and 95% confidence interval (CI) for the potential risk factors. Results: A total of 276 norovirus outbreaks were confirmed during the study period; the outbreak rate was 12.2 (95% CI: 9.9-14.6) per 100 home-years; elderly homes with a larger capacity (RR = 1.4, 95% CI: 1.3-1.5 (per 30-resident increment)), a higher staff-to-resident ratio (RR = 1.2, 95% CI: 1.1-1.3 (per 1/30 increment) and better wheelchair accessibility (RR = 2.0, 95% CI: 1.3-3.2) were found to have an elevated norovirus outbreak rate in Hong Kong elderly homes; Elderly homes with partitions between beds had a lower rate of norovirus outbreaks (RR = 0.6, 95% CI: 0.4-0.8). Conclusions: Elderly home capacity, staff-to-resident ratio and wheelchair accessibility were risk factors for norovirus outbreaks in Hong Kong elderly homes. Partitions between beds were a protective factor of norovirus outbreaks. These results should be considered in the infection control in Hong Kong elderly homes. © 2011 Lin et al; licensee BioMed Central Ltd.-
dc.languageeng-
dc.relation.ispartofBMC Public Health-
dc.titleInstitutional risk factors for norovirus outbreaks in Hong Kong elderly homes: A retrospective cohort study-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1186/1471-2458-11-297-
dc.identifier.pmid21569308-
dc.identifier.scopuseid_2-s2.0-79955767471-
dc.identifier.volume11-
dc.identifier.eissn1471-2458-

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