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Auricular Acupressure as an Adjuvant Treatment for Wheezing in Stable Chronic Obstructive Pulmonary Disease
Published on: May 10, 2024
Risk factors for recurrent wheezing following acute bronchiolitis: a 12-month follow-up
Lorena Cifuentes1, Solange Caussade, Claudia Villagrán
1Ambulatory Service, Department of Pediatrics, School of Medicine, Catholic University of Chile, Lira 85, Santiago de Chile, 833-0074 Chile. lcifuen@med.puc.cl
Insights
Infants with respiratory syncytial virus (RSV) bronchiolitis, especially those hospitalized, experience more recurrent wheezing episodes. Risk factors for recurrent wheezing differ between RSV-positive and RSV-negative infants.
Area of Science:
- Pediatrics
- Infectious Diseases
- Respiratory Medicine
Background:
- Bronchiolitis is a common respiratory infection in infants.
- Recurrent wheezing after bronchiolitis is a significant concern.
- Respiratory syncytial virus (RSV) is a primary cause of bronchiolitis.
Purpose of the Study:
- To identify wheezing recurrences in infants with RSV-positive and RSV-negative bronchiolitis.
- To determine risk factors associated with recurrent wheezing in these infant groups.
- To compare the incidence and predictors of wheezing episodes post-bronchiolitis.
Main Methods:
- A 1-year prospective cohort study involving infants under 2 years old.
- Monthly follow-up (clinical visits/telephone) to record wheezing episodes and risk factors.
- RSV enzyme immunoassay to categorize infants into RSV+ and RSV- groups.
Main Results:
- RSV+ infants had a higher mean number of wheezing recurrences (3.36/year) compared to RSV- infants (2.34/year).
- Hospitalization during acute RSV bronchiolitis was a significant risk factor for recurrent wheezing in RSV+ infants.
- In RSV- infants, male gender, number of siblings, and daycare attendance were associated with recurrent wheezing.
Conclusions:
- RSV-proven bronchiolitis, particularly when requiring hospitalization, is linked to increased recurrent wheezing in the following 12 months.
- Distinct risk factors contribute to recurrent wheezing in RSV+ and RSV- infant populations.
- Further research may explore underlying mechanisms like airway hyperreactivity in RSV+ infants.
Abstract:
The objective of this study was to identify wheezing recurrences and related risk factors in two groups of infants with bronchiolitis: respiratory syncytial virus (RSV)+ and RSV- as determined by RSV enzyme immunoassay. A 1-year prospective cohort study was conducted with infants younger than 2 years old. Follow-up was made monthly, by a clinical visit and/or by telephone, checking the number of wheezing episodes per month and possible related risk factors. There were 96 subjects enrolled, of whom 77 reached complete follow-up: 36 were RSV+ (46.8%), and 41 were RSV- (53.2%). In the RSV+ group, there were 17 males (47%), vs. RSV- with 30 males (73%) (P < 0.05); 22 RSV+ (61%) were admitted to hospital, vs.14 RSV- (34%) (P < 0.05). Mean age was not significantly different in both groups. The mean number of recurrences was 3.36 episodes/infant/year in the RSV+ and 2.34 in the RSV- group (P = 0.06). Crude relative risk (RR) for a new recurrence of an obstructive episode was 1.33 (95% CI, 0.99-1.79). After adjustment for several potential confounders, the RR was 1.41 (95% CI, 1.03-1.93). Hospitalization stay was longer in the RSV+ than the RSV- group (P < 0.05). In the RSV+ group, patients who had been hospitalized showed more recurrences (4.18) than those with outpatient treatment (2.07) (P < 0.05); this difference did not exist in the RSV- group. The related risk factors for recurrent wheeze in the RSV- group were male gender, number of siblings, and daycare attendance (P < 0.05). In the RSV+ group, the risk of recurrent wheeze was only increased by admission to hospital during the acute bronchiolitis episode (P < 0.05). We speculate that there may be a higher rate of increased airway reactivity and/or preexisting diminished lung function in RSV+ infants requiring hospitalization for their initial illness. In conclusion, RSV-proven bronchiolitis, particularly in those infants who are hospitalized, is associated with a higher recurrence of wheezing episodes in the subsequent 12 months. Other factors appear to account for recurrent wheeze in the RSV- group.
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