The calculator in question is the Diagnostic Criteria for Allergic Rhinitis. This is a set of criteria used to diagnose allergic rhinitis, a common condition characterized by symptoms such as sneezing, itching, nasal congestion, and rhinorrhea. The criteria are applicable to patients of all ages who present with symptoms suggestive of allergic rhinitis.

The clinical utility of this calculator is to aid in the accurate diagnosis of allergic rhinitis, which can help guide appropriate treatment and management strategies. It can also help differentiate allergic rhinitis from other conditions with similar symptoms, such as non-allergic rhinitis or sinusitis.

The diagnostic criteria for allergic rhinitis typically include a history of symptoms, physical examination findings, and may also involve allergy testing. However, the criteria may not be applicable or reliable in patients with non-allergic rhinitis, sinusitis, or other conditions that can mimic the symptoms of allergic rhinitis. Therefore, these conditions may be considered as exclusion criteria for the use of this calculator.

Diagnostic criteria for allergic rhinitis

# Criteria
 A. Presence of >= 1 typical symptoms (sneezing, nasal congestion, discharge or itch)
B. Demonstration of sensitization
C. Congestion of the mucosa and bilateral transparent secretions on anterior rhinoscopy

# Conditions
- A and B and C
- true