title: Clinical and aetiological aspects in urticaria and angio-oedema.
abstract: BACKGROUND
  Urticaria is a common disorder that affects as many as 20% of all people at some time during their lifetime.
  
  
  OBJECTIVE
  To analyse the prevalence of various forms of urticaria according to an aetiological and clinical classification, we carried out a 4-year study in an outpatient clinic.
  
  
  METHODS
  The study was carried out on 562 consecutive patients (178 males and 384 females; mean age 35.4 +/- 16), who had been referred to our unit for the study of urticaria and angio-oedema. Baseline investigations included: the patient's family and personal history of allergy; duration of symptoms, presence of associated symptoms and objective signs of the current episode; clinical, laboratory and instrumental investigations; assessment of response to antihistamine treatment.
  
  
  RESULTS
  A family history of atopy was present in 35% of patients and a personal history of allergy in 24%. We subdivided urticaria and angio-oedema into several groups on the basis of their clinical and aetiological aspects. Of the 562 patients, 424 (76%) presented with ordinary urticaria (43 acute urticaria, 311 chronic urticaria, 70 episodic urticaria), 80 (14%) physical urticaria, 49 (9%) angio-oedema without weals, six (1%) IgE-mediated contact urticaria and three (0.5%) urticarial vasculitis. In 64 cases (11%) urticaria/angio-oedema was associated with one or more symptoms. We identified 394 cases (82%) of idiopathic urticaria, 42 (9%) of immunological urticaria, 29 (6%) of non-immunological urticaria and 17 (3%) of urticaria secondary to infections. Of the treated subjects, 54% showed a good response to treatment with antihistamines.
  
  
  CONCLUSIONS
  Our data provide an overview of urticaria/angio-oedema in a large series of patients, based on clinical-aetiological aspects, and related to recent diagnostic guidelines.
authors.affiliation: Department of Medical Clinics, Immunology and Infectious Diseases, University of Bari, Piazza Giulio Cesare 11, Policlinico 70124, Bari, Italy. e.nettis@allergy.uniba.it
authors.forename: E
authors.initials: E
authors.lastname: Nettis
authors.forename: A
authors.initials: A
authors.lastname: Pannofino
authors.forename: C
authors.initials: C
authors.lastname: D'Aprile
authors.forename: A
authors.initials: A
authors.lastname: Ferrannini
authors.forename: A
authors.initials: A
authors.lastname: Tursi
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000799:Angioedema / Q000145:classification / Q000188:drug therapy / Q000209:etiology; D000900:Anti-Bacterial Agents / Q000009:adverse effects; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects; D002908:Chronic Disease; D005192:Family Health; D005260:Female; D006634:Histamine H1 Antagonists / Q000627:therapeutic use; D006801:Humans; D007073:Immunoglobulin E / Q000276:immunology; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome; D014581:Urticaria / Q000145:classification* / Q000188:drug therapy / Q000209:etiology
chemical_list: D000900:Anti-Bacterial Agents; D000894:Anti-Inflammatory Agents, Non-Steroidal; D006634:Histamine H1 Antagonists; D007073:Immunoglobulin E