BACKGROUND: Patients with severe and difficult-to-treat asthma represent a small percentage of asthma patients, yet they account for much of the morbidity, mortality, and cost of disease. The goal of The Epidemiology and Natural History of Asthma: Outcomes and Treatment Regimens (TENOR) study is to better understand the natural history of asthma in these patients. OBJECTIVE: To describe the methods and baseline characteristics of the TENOR study cohort. METHODS: The TENOR study is a 3-year, multicenter, observational study of patients with severe or difficult-to-treat asthma. From January through October 2001, more than 400 US pulmonologists and allergists enrolled patients. Patients 6 years or older who were considered to have severe or difficult-to-treat asthma by their physicians were eligible. Patients have been receiving care for 1 year or more, have a smoking history of 30 pack-years or less, and have current high medication or health care utilization in the past year. Data are collected semiannually. RESULTS: A total of 4,756 patients enrolled and completed a baseline visit. Overall, 73% of the TENOR study patients are adults, 10% are adolescents, and 16% are children. According to physician evaluation, 48% of patients have severe asthma, 48% have moderate asthma, 3% have mild asthma, and 96% have difficult-to-treat asthma. Severe asthmatic patients have the highest health care utilization in the past 3 months (P < .001). CONCLUSIONS: The TENOR study is the largest cohort of patients with severe or difficult-to-treat asthma. Although patients are equally divided into moderate or severe asthma categories, most are considered difficult-to-treat. The TENOR study highlights the lack of control in moderate-to-severe asthma and provides a unique opportunity to examine factors related to health outcomes in this understudied population.
BACKGROUND:Patients with severe and difficult-to-treat asthma represent a small percentage of asthma patients, yet they account for much of the morbidity, mortality, and cost of disease. The goal of The Epidemiology and Natural History of Asthma: Outcomes and Treatment Regimens (TENOR) study is to better understand the natural history of asthma in these patients. OBJECTIVE: To describe the methods and baseline characteristics of the TENOR study cohort. METHODS: The TENOR study is a 3-year, multicenter, observational study of patients with severe or difficult-to-treat asthma. From January through October 2001, more than 400 US pulmonologists and allergists enrolled patients. Patients 6 years or older who were considered to have severe or difficult-to-treat asthma by their physicians were eligible. Patients have been receiving care for 1 year or more, have a smoking history of 30 pack-years or less, and have current high medication or health care utilization in the past year. Data are collected semiannually. RESULTS: A total of 4,756 patients enrolled and completed a baseline visit. Overall, 73% of the TENOR study patients are adults, 10% are adolescents, and 16% are children. According to physician evaluation, 48% of patients have severe asthma, 48% have moderate asthma, 3% have mild asthma, and 96% have difficult-to-treat asthma. Severe asthmatic patients have the highest health care utilization in the past 3 months (P < .001). CONCLUSIONS: The TENOR study is the largest cohort of patients with severe or difficult-to-treat asthma. Although patients are equally divided into moderate or severe asthma categories, most are considered difficult-to-treat. The TENOR study highlights the lack of control in moderate-to-severe asthma and provides a unique opportunity to examine factors related to health outcomes in this understudied population.
Authors: Wendy C Moore; Eugene R Bleecker; Douglas Curran-Everett; Serpil C Erzurum; Bill T Ameredes; Leonard Bacharier; William J Calhoun; Mario Castro; Kian Fan Chung; Melissa P Clark; Raed A Dweik; Anne M Fitzpatrick; Benjamin Gaston; Mark Hew; Iftikhar Hussain; Nizar N Jarjour; Elliot Israel; Bruce D Levy; James R Murphy; Stephen P Peters; W Gerald Teague; Deborah A Meyers; William W Busse; Sally E Wenzel Journal: J Allergy Clin Immunol Date: 2007-02 Impact factor: 10.793
Authors: Wilson Quezada; Eun Soo Kwak; Joan Reibman; Linda Rogers; John Mastronarde; William G Teague; Christine Wei; Janet T Holbrook; Emily DiMango Journal: Ann Allergy Asthma Immunol Date: 2015-12-19 Impact factor: 6.347
Authors: Xingnan Li; Gregory A Hawkins; Elizabeth J Ampleford; Wendy C Moore; Huashi Li; Annette T Hastie; Timothy D Howard; Homer A Boushey; William W Busse; William J Calhoun; Mario Castro; Serpil C Erzurum; Elliot Israel; Robert F Lemanske; Stanley J Szefler; Stephen I Wasserman; Sally E Wenzel; Stephen P Peters; Deborah A Meyers; Eugene R Bleecker Journal: J Allergy Clin Immunol Date: 2013-03-28 Impact factor: 10.793
Authors: Anikó Bohács; Eva Pállinger; Lilla Tamási; János Rigó; Zsolt Komlósi; Veronika Müller; Yang Dong; Pál Magyar; András Falus; György Losonczy Journal: Inflamm Res Date: 2010-01 Impact factor: 4.575