Background: The eosinophil/neutrophil/platelet-to-lymphocyte ratios (ELR, NLR, and PLR) have been used as clinical markers of systemic inflammation. However, they have not yet been tested in various subtypes of immediate hypersensitivity to nonsteroidal anti-inflammatory drugs (NSAIDs).
Objectives: To assess the ELR, NLR, and PLR in various types of hypersensitivity to NSAIDs.
Materials And Methods: A retrospective analysis of complete blood cell count and the ELR, NLR, and PLR was performed. Appropriate types of hypersensitivity to NSAIDs were diagnosed based on the anamnesis and drug provocation tests. The analysis covered 97 patients. Twenty were diagnosed with NERD (NSAID-exacerbated respiratory disease), 20 with NECD (NSAID-exacerbated cutaneous disease), 38 with NIUA (NSAID-inducted urticaria/angioedema), and 19 with SNIUAA (single-NSAID-induced urticaria/angioedema or anaphylaxis). Two controls groups were included: the first covered 15 patients with bronchial asthma and the second 28 patients with chronic spontaneous urticaria without NSAID hypersensitivity.
Results: The NLR did not differ significantly between the NSAID hypersensitivity types. The ELR was significantly higher in NERD patients, and the PLR was significantly lower in NECD patients than in patients with other types of NSAID hypersensitivity and in controls.
Conclusions: The ELR and PLR may be useful in differentiating various types of immediate hypersensitivity to NSAIDs. Moreover, the ELR may be helpful in differentiating patients with bronchial asthma with and without NSAID hypersensitivity and PLR in differentiating patients with chronic spontaneous urticaria from NECD.
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