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Predictors for late tolerance development in food protein‐induced allergic proctocolitis

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Background:

Food protein-induced allergic proctocolitis (FPIAP) is a non‐immunoglobulin E (IgE) mediated food allergy that typically presents with blood-mixed mucoid stool.

Objective:

To identify the predictors that affect the tolerance development in infants with FPAIP and laboratory as well as clinical differences between patients with early and with late tolerance.

Methods:

A total of 185 infants with FPIAP were included. The patients were grouped and analyzed based on laboratory tests and clinical characteristics.

Results:

The median (interquartile range [IQR]) age of onset of symptoms was 2.0 months (1.0‐3.0 months). Symptoms began in severe cases in patients (n = 23) at a younger median (IQR) age (1.5 months [0.7‐2.0 months]) than the group with nonsevere presentation (median 2.0 months [IQR 1.5‐3.0 months]) (p < 0.001). The frequency of neutropenia (<1500/mm3) (p = 0.045) and eosinophilia (450 mm3) (p = 0.018) was increased in severe cases. Concomitant IgE-related food allergy (odds ratio [OR] 3.595 [95% confidence interval {CI}, 1.096‐11.788], p = 0.035), non‐IgE-mediated multiple food allergy (OR 3.577 [95% CI, 1.595‐8.018], p = 0.002), feeding with cow's milk‐based formula (at least once during infancy) (OR 2.517 [95% CI, 1.188‐5.333], p = 0.016), and late complementary feeding (OR 5.438 [95% CI, 2.693‐10.981], p < 0.001) were the predictors for late tolerance development. The estimated optimal cutoff value for introduction of complementary foods for the resolution of allergy was 5.5 months, with 69.4% sensitivity, 74.4% specificity, and an area under the curve of 0.737 (95% CI, 0.626‐0.812) (p < 0.001).

Conclusion:

This study showed that the early introduction of complementary feeding accelerates tolerance development in FPAIP. A longer duration of an elimination diet has no impact on the resolution of allergy. Physicians should consider conservative avoidance measures and earlier introduction of complementary feeding in FPIAP.
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Keywords: food protein induced allergic proctocolitis; infants; non‐immunoglobulin E-mediated food allergy; prognosis of food protein induced allergic proctocolitis

Document Type: Research Article

Publication date: January 1, 2020

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  • Allergy and Asthma Proceedings is a peer reviewed publication dedicated to distributing timely scientific research regarding advancements in the knowledge and practice of allergy, asthma and immunology. Its primary readership consists of allergists and pulmonologists.

    The goal of the Proceedings is to publish articles with a predominantly clinical focus which directly impact quality of care for patients with allergic disease and asthma and by having the potential to directly impact the quality of patient care. AAP welcomes the submission of original works including peer-reviewed original research and clinical trial results. Additionally, as the official journal of the Eastern Allergy Conference (EAC), AAP will publish content from EAC poster sessions as well as review articles derived from EAC lectures.

    Featured topics include asthma, rhinitis, sinusitis, food allergies, allergic skin diseases, diagnostic techniques, allergens, and treatment modalities. Published material includes peer-reviewed original research, clinical trials and review articles.

    Articles marked "F" offer free full text for personal noncommercial use only.

    The journal is indexed in Thomson Reuters Web of Science and Science Citation Index Expanded, plus the National Library of Medicine's PubMed service.
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