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2015 ; 19
(66
): 1-130
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Saline in acute bronchiolitis RCT and economic evaluation: hypertonic saline in
acute bronchiolitis - randomised controlled trial and systematic review
#MMPMID26295732
Everard ML
; Hind D
; Ugonna K
; Freeman J
; Bradburn M
; Dixon S
; Maguire C
; Cantrill H
; Alexander J
; Lenney W
; McNamara P
; Elphick H
; Chetcuti PA
; Moya EF
; Powell C
; Garside JP
; Chadha LK
; Kurian M
; Lehal RS
; MacFarlane PI
; Cooper CL
; Cross E
Health Technol Assess
2015[Aug]; 19
(66
): 1-130
PMID26295732
show ga
BACKGROUND: Acute bronchiolitis is the most common cause of hospitalisation in
infancy. Supportive care and oxygen are the cornerstones of management. A
Cochrane review concluded that the use of nebulised 3% hypertonic saline (HS) may
significantly reduce the duration of hospitalisation. OBJECTIVE: To test the
hypothesis that HS reduces the time to when infants were assessed as being fit
for discharge, defined as in air with saturations of >?92% for 6 hours, by 25%.
DESIGN: Parallel-group, pragmatic randomised controlled trial, cost-utility
analysis and systematic review. SETTING: Ten UK hospitals. PARTICIPANTS: Infants
with acute bronchiolitis requiring oxygen therapy were allocated within 4 hours
of admission. INTERVENTIONS: Supportive care with oxygen as required, minimal
handling and fluid administration as appropriate to the severity of the disease,
3% nebulised HS every ±?6 hours. MAIN OUTCOME MEASURES: The trial primary outcome
was time until the infant met objective discharge criteria. Secondary end points
included time to discharge and adverse events. The costs analysed related to
length of stay (LoS), readmissions, nebulised saline and other NHS resource use.
Quality-adjusted life-years (QALYs) were estimated using an existing utility
decrement derived for hospitalisation in children, together with the time spent
in hospital in the trial. DATA SOURCES: We searched MEDLINE, EMBASE, the Cochrane
Central Register of Controlled Trials and other databases from inception or from
2010 onwards, searched ClinicalTrials.gov and other registries and hand-searched
Chest, Paediatrics and Journal of Paediatrics to January 2015. REVIEW METHODS: We
included randomised/quasi-randomised trials which compared HS versus saline
(±?adjunct treatment) or no treatment. We used a fixed-effects model to combine
mean differences for LoS and assessed statistical heterogeneity using the I (2)
statistic. RESULTS: The trial randomised 158 infants to HS (n?=?141 analysed) and
159 to standard care (n?=?149 analysed). There was no difference between the two
arms in the time to being declared fit for discharge [median 76.6 vs. 75.9 hours,
hazard ratio (HR) 0.95, 95% confidence interval (CI) 0.75 to 1.20] or to actual
discharge (median 88.5 vs. 88.7 hours, HR 0.97, 95% CI 0.76 to 1.23). There was
no difference in adverse events. One infant developed bradycardia with
desaturation associated with HS. Mean hospital costs were £2595 and £2727 for the
control and intervention groups, respectively (p?=?0.657). Incremental QALYs were
0.0000175 (p?=?0.757). An incremental cost-effectiveness ratio of £7.6M per QALY
gained was not appreciably altered by sensitivity analyses. The systematic review
comprised 15 trials (n?=?1922) including our own. HS reduced the mean LoS by
-0.36 days (95% CI -0.50 to -0.22 days). High levels of heterogeneity (I
(2)?=?78%) indicate that the result should be treated cautiously. CONCLUSIONS: In
this trial, HS had no clinical benefit on LoS or readiness for discharge and was
not a cost-effective treatment for acute bronchiolitis. Claims that HS achieves
small reductions in LoS must be treated with scepticism. FUTURE WORK:
Well-powered randomised controlled trials of high-flow oxygen are needed. STUDY
REGISTRATION: This study is registered as NCT01469845 and CRD42014007569. FUNDING
DETAILS: This project was funded by the NIHR Health Technology Assessment (HTA)
programme and will be published in full in Health Technology Assessment; Vol. 19,
No. 66. See the HTA programme website for further project information.
|*Bronchiolitis/drug therapy/therapy
[MESH]
|*Oxygen Inhalation Therapy/methods
[MESH]
|*Saline Solution, Hypertonic/administration & dosage/economics/therapeutic use
[MESH]