Statistical Analysis in Allergy and Immunology: A Review With Practical Examples.

Statistical analysis plays a critical role in biomedical research, ensuring that data are interpreted appropriately and that conclusions are both valid and reproducible. In allergy and immunology, where studies increasingly rely on complex data structures and analytical approaches, clarity on biostatistical methods is essential to support transparency and scientific rigor. However, inconsistent statistical reporting and misuse of analytical techniques remain persistent challenges in the field.

Correction: Efficacy of index of reactivity-liquid sublingual immunotherapy in allergic rhinoconjunctivitis: a systematic review and meta-analysis of randomized studies.

[This corrects the article DOI: 10.3389/falgy.2025.

Efficacy of index of reactivity-liquid sublingual immunotherapy in allergic rhinoconjunctivitis: a systematic review and meta-analysis of randomized studies.

Introduction: Allergen immunotherapy (AIT) is a well-established treatment with demonstrated efficacy and safety. However, variability in study outcomes remains a challenge, driven by differences in patient characteristics, study designs, and treatment durations. Moreover, disparities in allergen composition and quality of AIT products across manufacturers contribute to significant heterogeneity, complicating the interpretation of efficacy and safety data.

Genetic polymorphisms and cytokine levels in ischemic stroke: associations with subtypes and prognosis.

Introduction: Some genetic polymorphisms are associated with the risk of stroke, although the individual contribution of such polymorphisms is considered modest.

Aims: To evaluate the frequency of single nucleotide polymorphisms (SNPs) in genes encoding proinflammatory cytokines and coagulation factors in stroke patients, the relationships between the serum levels of the cytokines analyzed with stroke subtypes and prognosis.

Material And Methods: A retrospective, cross-sectional, observational, analytical, case-control study.

Real-world effectiveness of mepolizumab in asthma: a systematic review and meta-analysis.

Objective: Exacerbations and suboptimal disease control are common in severe asthma with an eosinophilic phenotype (SAep). Mepolizumab, an anti-interleukin-5 monoclonal antibody, has demonstrated efficacy and safety in randomized controlled trials (RCTs). We aimed to strengthen the real-world evidence base for mepolizumab in SAep.

Two-year follow-up after drug desensitization in mucopolysaccharidosis.

Background: Mucopolysaccharidosis (MPS) type 1 S and type 2 are rare lysosomal storage disorders characterized by impaired enzyme production, resulting in glycosaminoglycans accumulation within lysosomes. Enzyme Replacement Therapy (ERT) with laronidase and idursulfase are first line treatments, respectively. However, infusion-related hypersensitivity reactions (HR) may lead to ERT discontinuation.

A 300 IR 5-grass pollen sublingual immunotherapy tablet-specific systematic review and meta-analysis confirms its clinical benefits for patients with allergic rhinoconjunctivitis with or without asthma.

Background: In the realm of allergen immunotherapy (AIT), the quality of evidence varies across different products, making it unjustifiable to extend overall conclusions to all AIT products, as highlighted by WAO and EAACI.

Objective: To confirm the efficacy of the 300 IR 5-grass pollen sublingual AIT (SLIT)-tablet through a specific meta-analysis of randomized controlled trials (RCTs) involving patients with allergic rhino-conjunctivitis (ARC) with/without mild/intermittent asthma.

Methods: Data from published RCTs on the 300 IR 5-grass SLIT-tablet were gathered from electronic databases (MEDLINE, ISI Web of Science, LILACS, the Cochrane Library and ClinicalTrial.

Long-Term Clinical and Sustained REMIssion in Severe Eosinophilic Asthma Treated With Mepolizumab: The REMI-M Study.

Background: Biological therapies, such as mepolizumab, have transformed the treatment of severe eosinophilic asthma. Although mepolizumab's short-term effectiveness is established, there is limited evidence on its ability to achieve long-term clinical remission.

Objective: To evaluate the long-term effectiveness and safety of mepolizumab, explore its potential to induce clinical and sustained remission, and identify baseline factors associated with the likelihood of achieving remission over 24 months.

An interpretable cluster-based logistic regression model, with application to the characterization of response to therapy in severe eosinophilic asthma.

Asthma is a disease characterized by chronic airway hyperresponsiveness and inflammation, with signs of variable airflow limitation and impaired lung function leading to respiratory symptoms such as shortness of breath, chest tightness and cough. Eosinophilic asthma is a distinct phenotype that affects more than half of patients diagnosed with severe asthma. It can be effectively treated with monoclonal antibodies targeting specific immunological signaling pathways that fuel the inflammation underlying the disease, particularly Interleukin-5 (IL-5), a cytokine that plays a crucial role in asthma.

IR (index of reactivity)-house dust mite sublingual immunotherapy liquid formulation for allergic rhinoconjunctivitis: Systematic review and meta-analysis of randomized and nonrandomized studies.

Background: Although randomized controlled trials (RCT) are the reference standard of evidence in allergen immunotherapy (AIT), nonrandomized studies (NRS) are needed to confirm their results in more representative populations, particularly for treatment duration and persistence. However, when discrepancies are observed between RCT and NRS, NRS reliability decreases because these discrepant results are generally attributed to the methodologic flaws of NRS.

Objective: We compared the benefit of sublingual AIT (SLIT) for allergic rhinoconjunctivitis in NRS versus RCT focusing on a single product/allergen to reduce heterogeneity.

An Update on Nonsteroidal Anti-Inflammatory Drug-Induced Urticaria.

Background: Hypersensitivity reactions to non-steroidal anti-inflammatory drugs (HR-NSAIDs) are common adverse events related to the widespread use of over-the-counter NSAIDs for the treatment of a variety of inflammatory conditions. Urticaria is the most commonly reported immediate cutaneous clinical sign of HR-NSAIDs, but it can be a manifestation of pathophysiologically different clinical entities that require different therapeutic strategies. The aim of this study is to ease the identification of the correct phenotype of HR-NSAIDs in patients reporting urticaria associated with the intake of NSAIDs and provide updated information about their diagnosis and management.

Latex Allergy - From Discovery to Component-resolved Diagnosis.

Latex allergy is a hypersensitivity response to natural rubber latex (NRL) proteins or rubber chemicals used in the manufacture of latex products. An accurate diagnosis is the first step in the effective management of individuals with latex allergy, especially in high-risk groups, such as healthcare workers and those affected by spina bifida. Diagnosis is based on the clinical history and an accurate allergological evaluation.

GM Allotypes and COVID-19. A Pilot Study Performed on Sicilian Patients.

Several studies suggest that genetic variants that influence the onset, maintenance and resolution of the immune response might be fundamental in predicting the evolution of COVID-19. In the present paper, we analysed the distribution of GM allotypes (the genetic markers of immunoglobulin γ chains) in symptomatic and asymptomatic COVID-19 patients and in healthy controls, all born and residing in Sicily. Indeed, the role played by GM allotypes in immune responses and infection control is well known.

Hypersensitivity reaction during enzyme replacement therapy in lysosomal storage disorders. A systematic review of desensitization strategies.

Lysosomal storage diseases (LSDs) are rare genetic metabolic disorders that cause the accumulation of glycosaminoglycans in lysosomes due to enzyme deficiency or reduced function. Enzyme replacement therapy (ERT) represents the gold standard treatment, but hypersensitivity reaction can occur resulting in treatment discontinuation. Thus, desensitization procedures for different culprit recombinant enzymes can be performed to restore ERT.

Comparison of evidence of treatment effects in randomized and nonrandomized studies on allergen immunotherapy.

Nonrandomized studies (NRS) on allergen immunotherapy (AIT) particularly lend themselves to evaluate outcomes that are insufficiently addressed in randomized controlled studies (RCTs). However, NRS are prone to several sources of bias, which limit their validity. We aimed at comparing AIT effects between RCTs and NRS and evaluate the reasons for discrepancies in study results.

Allergic adverse events following immunization: Data from post-marketing surveillance in Apulia region (South of Italy).

Introduction: Among adverse events following immunization (AEFIs), allergic reactions elicit the most concern, as they are often unpredictable and can be life-threatening. Their estimates range from one in 1,000,000 to one in 50,000 vaccine doses. This report describes allergic events following immunization reported from 2020 to 2021 in Puglia, a region in the South-East of Italy with around 4 million inhabitants.