Clinical Effectiveness and Economical Impact of Medical Indoor Environment Counselors Visiting Homes of Asthma Patients

Methodology/Study schedule : A prospective multicenter randomised, open label, controlled trial with blind evaluation of the primary evaluation criterion on three parallel groups of patients. Procedures : Home intervention of MIECs that comprise diagnostic of allergen/irritant exposure (after sampling), advices for allergen/irritant avoidance and follow up of advice compliance. After randomisation and agreement of the patient and the family, the " intervention group " will benefit from a first home intervention of a MIEC during the 4 weeks following inclusion, then a final visit at the end of the study after 12 months. Two comparative groups will be identified : * the " control group " who will benefit from a first home intervention of a MIEC but without advices (only audit + sampling), then a final and a complete visit at the end of the study * a " non intervention " group with no initial visit, but who will benefit from a complete home intervention of a MIEC at the end of the study. Substantial modification of the 20th of June, 2016 : Modification of the design : change into a 2 parallel groups evaluation Justification: At its meeting of June 1, 2016, considering the inclusion difficulties, the Scientific Council decided to give up the "Control" group. The study design is then : a prospective multicenter randomised, open label, controlled trial with blind evaluation of the primary evaluation criterion on three parallel groups of patients. The objective is to recruit 50 to 70 patients by arm. Expected findings and impact : If our hypothesis that home intervention of MIECs are cost-effective on asthma control, then it is relevant to include such service in the medical care during the management of asthma patients with a reimbursement by the social security.