Relationship between 6-minute Walk Distance and Risk of Hospitalization from Exacerbation of COPD in One Year at Trang Hospital
Keywords:โรคปอดอุดกั้นเรื้อรัง, การนอนโรงพยาบาล, ความเสี่ยง
Objectives: To investigate a relationship between a 6-minute walk distance (6MWD) and a risk of hospitalization in patients with chronic obstructive pulmonary disease (COPD) in one year.
Study design: Retrospective chart review
Setting: Department of Rehabilitation Medicine, Trang Hospital, Trang province
Subjects: Patients with COPD who had a 6-minute walk test (6MWT) done at outpatient rehabilitation clinic between 1st July 2017- 30th April 2018.
Methods: Demographic data, 6MWD and number of admission for acute COPD exacerbation were extracted from the selected medical records. The patients were subsequently divided into two groups: 6MWD < 350 meters and ≥ 350 meters. The risk of hospitalization for exacerbation in one year was calculated and compared between the two groups.
Results: Of the 123 patients, 90.2% were male. The mean age was 70.5 (SD 9.8) years. The mean 6MWD was 381.4 (SD 113.7) meters. During the one year follow up period 31.7% of patients experienced hospitalization from exacerbation of COPD. The mean of hospitalization in group of 6MWD < 350 meters and ≥ 350 meters was 1.2 (SD 1.3) and 0.3 (SD 0.7) times respectively. The group with 6MWD < 350 meters had a higher risk of being admitted to the hospital due to acute exacerbation of COPD than that of the group with 6MWD ≥ 350 meters. The calculated odds ratio was 6.6 at p < 0.001.
Conclusion: Patients with COPD and the 6MWD < 350 meters had 6.6 times risk of hospitalization for treatment of acute COPD exacerbation in one year more than those with the 6MWD at least 350 meters.
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