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Title: Predictive value of the respiratory syncytial virus risk-scoring tool in the term infant in Canada.
Author: Paes B, Cole M, Latchman A, Pinelli J.
Journal: Curr Med Res Opin; 2009 Sep; 25(9):2191-6. PubMed ID: 19604126.
Abstract:
BACKGROUND: Palivizumab prophylaxis against respiratory syncytial virus (RSV) infection has been widely adopted for high-risk infants during the RSV season, based on country-specific guidelines. OBJECTIVE: To determine if a validated, risk-scoring tool (RST), can be applied to term, RSV-positive infants seen in the emergency room (ER) to predict need for hospitalization, in order to target prophylaxis cost effectively at a selected group of children. DESIGN: Retrospective, descriptive study. SETTING: McMaster Children's Hospital in Hamilton, Ontario, Canada. PARTICIPANTS: A total of 72, consecutive, term, RSV-positive cases were identified retrospectively, from November through April during the 2006-2007 RSV season. METHODS: A questionnaire/chart review was conducted on 68 of 72 cases, to determine risk categories based on the RST. Four, trained abstractors, extracted pertinent data from the medical records of RSV-positive patients. Means, standard deviations (SD), and percents were used to describe the study variables for hospitalized and ER patients discharged home. Chi-square tests were used to compare infants' risk factors to hospitalization. ANOVA was used for comparisons within and between risk groups and RST scores. A p-value of <0.05 was considered statistically significant. RESULTS: The majority of infants scored in the low-risk category (n = 44), versus moderate (n = 16) or high risk (n = 8). Within the low-risk category, 27 (61%) of children were admitted to hospital compared to 17 (39%) who were treated in the ER and discharged home. The mean RST scores for those admitted to the pediatric intensive care unit/ward, the ward only, or those discharged home from the ER were 48.3 (n = 10), 41.0 (n = 36), and 36.5 (n = 22), respectively (p = 0.17). The mean number of risk factors for those discharged home versus hospitalized patients was 2.5 (1.3) and 2.97 (1.13), respectively (p = 0.15). Only two of eight cases in the high-risk group required intensive care. CONCLUSIONS: Overall, the risk-scoring tool did not discriminate between low versus moderate- to high-risk RSV-positive term infants who require hospitalization which has cost implications, since universal prophylaxis of this cohort would be financially prohibitive. A larger study is necessary to establish risk factors that more accurately determine RSV hospitalization among term infants.

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