Detailed Instructions: Given a passage with a context and an answer, construct a question on the basis of the information present in the passage. Construct the question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) it answer uses text phrases from the passage. Avoid creating questions that (i) can't be answered correctly without actually understanding the passage and (ii) uses the same words or phrases given in the passage.
Q: Context: Chronic urticaria is one of the perplexing problems faced by clinicians. There are a few reports associating house dust mite sensitivity with chronic urticaria, based upon the patient's history as well as intradermal skin testing and in vitro analysis.", 'To investigate the possible association between house dust mite sensitivity and chronic urticaria.', 'In this case control study three groups of patients were enrolled. Group I: Chronic urticaria (73 subjects). Group II: Chronic urticaria with collateral allergic disorders (49 subjects). Group III: Normal subjects without chronic urticaria or other allergies (25 subjects). All the patients underwent skin prick testing with antigens of the house dust mite, Dermatophagoides pteronyssinus (DP) and Dermatophagoides farinae (DF), with positive and negative controls.', 'Among the patients with chronic urticaria, 78/122 (64%) patients had skin sensitivity to house dust mites. Out of these, 39/73 (53%) had chronic urticaria alone and 39/49 (79%) had chronic urticaria with other associated allergies. Among the normal control subjects, 7/25(28%) reacted positively to house dust mites.
Answer: This study suggests a possible association of house dust mite sensitivity with chronic urticaria.
A:
Is house dust mite sensitivity a factor in chronic urticaria?