Abscess volume as a predictor of surgical intervention in children hospitalized with orbital cellulitis: A multicentre cohort study.

Orbital cellulitis with subperiosteal or orbital abscess can result in serious morbidity and mortality in children. Objective volume criterion measurement on cross-sectional imaging is a useful clinical tool to identify patients with abscess who may require surgical drainage. To determine the predictive value of abscess volume and the optimal volume cut-point for surgical intervention. We conducted an observational cohort study using medical records from children hospitalized between 2009 and 2018. Multicentre study using data from 6 children's hospitals. Children were included if they were between 2 months and 18 years of age and hospitalized for an orbital infection with an abscess confirmed on cross-sectional imaging. Subperiosteal or orbital abscess volume. The primary outcome was surgical intervention, defined as subperiosteal and/or orbital abscess drainage. Multivariable logistic regression was performed to assess the association of abscess volume with surgery. To determine the optimal abscess volume cut-point, receiver operating characteristic (ROC) analysis was performed using the Youden Index to optimize sensitivity and specificity. Of the 150 participants (mean [SD] age, 8.5 [4.5] years), 68 (45.3%) underwent surgical intervention. On multivariable analysis, larger abscess volume and non-medial abscess location were associated with surgical intervention (abscess volume: adjusted odds ratio [aOR], 1.46; 95% CI, 1.11-1.93; abscess location: aOR, 3.46; 95% CI, 1.4-8.58). ROC analysis demonstrated an optimal abscess volume cut-point of 1.18 mL [AUC: 0.75 (95% CI 0.67-0.83) sensitivity: 66%; specificity: 79%]. CONCLUSIONS AND RELEVANCE: In this multicentre cohort study of 150 children with subperiosteal or orbital abscess, larger abscess volume and non-medial abscess location were significant predictors of surgical intervention. Children with abscesses >1.18 mL should be considered for surgery.

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Déclaration de conflit d'intérêts

Declaration of competing interest PJG has received grants from the Canadian Institutes of Health Research (CIHR), the PSI Foundation, and The Hospital for Sick Children. He has received nonfinancial support from the EBMLive Steering Committee (expenses reimbursed to attend conferences) and the CIHRInstitute of Human Development, Child and Youth Health (as a member of the institute advisory board, expenses reimbursed to attend meetings). He is a member of the CMAJ Open and BMJ Evidence Based Medicine Editorial Board. PCP has received grants from the Hospital for Sick ChildrenFoundation (SP05-602), Canadian Institutes of Health Research (FRN # 115059), and non-financial support for an investigator-initiated trial for which Mead Johnson Nutrition provides non-financial support (Fer-In-Sol® liquid iron supplement) (2011–2017). OD was supported by a Chercheur Boursier Clinicien Award, from the Fonds de recherche du Québec – Santé. GW has received grants from the Canadian Institutes of Health Research and the Hamilton Health SciencesFoundation.