title: Risk factors for recurrence after successful treatment of Mycobacterium avium complex lung disease.
abstract: This study analyzed the recurrence rate and risk factors for recurrence of Mycobacterium avium complex (MAC) lung disease in patients successfully treated for this disease. The medical records of 158 patients successfully treated for MAC lung disease at a tertiary referral center in South Korea between March 2000 and December 2009 were retrospectively analyzed. Recurrence was recorded, and factors associated with recurrence were analyzed. The mean age of the 158 patients was 60.7 ± 11.1 years. The etiologic agent was Mycobacterium avium in 77 patients (48.7%) and Mycobacterium intracellulare in 81 patients (51.3%). Radiographic features included nodular bronchiectatic disease in 95 (60.1%), fibrocavitary disease in 49 (31.0%), and an unclassifiable form in 14 (8.9%) patients. Almost all (98.7%, 156/158) patients had been previously treated with a macrolide-containing regimen, and 68 (43.0%) patients had received treatment with an aminoglycoside. During a median follow-up of 43.8 months after completion of therapy, 50 patients (31.6%) experienced recurrence, at a median of 11.9 months after treatment completion. Multivariate analysis showed that only the nodular bronchiectatic form of the disease (hazard ratio, 2.39; 95% confidence interval, 1.19 to 4.81) was independently associated with an increased risk of recurrence. Recurrence after successful treatment is frequent in patients with MAC lung disease. The recurrence rate was significantly higher in patients with the nodular bronchiectatic form than in those with the fibrocavitary form or an unclassifiable form of the disease.
authors.affiliation: Division of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea.
authors.forename: Bo Young
authors.initials: BY
authors.lastname: Lee
authors.affiliation: Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, South Korea.
authors.forename: Sunyoung
authors.initials: S
authors.lastname: Kim
authors.affiliation: Department of Internal Medicine, Kangwon National University Hospital, Chuncheon, South Korea.
authors.forename: YoonKi
authors.initials: Y
authors.lastname: Hong
authors.affiliation: Division of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea.
authors.forename: Sang-Do
authors.initials: SD
authors.lastname: Lee
authors.affiliation: Division of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea.
authors.forename: Woo Sung
authors.initials: WS
authors.lastname: Kim
authors.affiliation: Division of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea.
authors.forename: Dong Soon
authors.initials: DS
authors.lastname: Kim
authors.affiliation: Division of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea.
authors.forename: Tae Sun
authors.initials: TS
authors.lastname: Shim
authors.affiliation: Division of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea heathcliff6800@hanmail.net.
authors.forename: Kyung-Wook
authors.initials: KW
authors.lastname: Jo
mesh_terms: D000368:Aged; D000617:Aminoglycosides / Q000627:therapeutic use; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008171:Lung Diseases / Q000188:drug therapy / Q000453:epidemiology*; D018942:Macrolides / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D015269:Mycobacterium avium Complex / Q000187:drug effects / Q000472:pathogenicity*; D015270:Mycobacterium avium-intracellulare Infection / Q000188:drug therapy / Q000453:epidemiology*; D012008:Recurrence; D012189:Retrospective Studies; D012307:Risk Factors
chemical_list: D000617:Aminoglycosides; D000900:Anti-Bacterial Agents; D018942:Macrolides