Assessment of the value of 6-min walk test to predict the severity of interstitial lung disease among Indian patients
Introduction: The prevalence of interstitial lung disease (ILD) is increasing. High-resolution computerized tomography (HRCT), despite having limitations, remains the choice of method for diagnosis and assessment of severity of ILD. Objective: To determine the efficacy of 6-min walk test to assess t...
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Published in | Journal of Association of Chest Physicians Vol. 12; no. 1; pp. 11 - 19 |
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Abstract | Introduction: The prevalence of interstitial lung disease (ILD) is increasing. High-resolution computerized tomography (HRCT), despite having limitations, remains the choice of method for diagnosis and assessment of severity of ILD. Objective: To determine the efficacy of 6-min walk test to assess the severity of the ILD compared to HRCT. Methodology: A cross-sectional study was done among 40 patients with ILD in a tertiary hospital in Hyderabad. The data included age, gender, smoking, HRCT, 6-min walk test, spirometry, diffusion lung capacity and medical history. Mann–Whitney U test, Kruskal–Wallis test, and ROC curve were used to determine the outcomes. Results: The mean age of participants was 57.18 + 13.01 years. 62.5% never smoked. Overall, 50% had severe ILD, and the rest had mild to moderate. The distance walked per 6-min, SpO 2 before and SpO 2 after, was significantly lower ( p = 0.001; 0.002; <0.001, respectively) among patients with severe ILD than mild or moderate. The sensitivity and 1-specificity of the distance walked in 6-min to detect the severity of ILD was 0.90 and 0.31, respectively; sensitivity and 1-specificity of SpO 2 before the test was 0.81 and 0.34, while that of SpO 2 after the test was 0.90 and 0.17, respectively. Conclusion: This study found that the 6-min walk test is highly sensitive and specific for predicting the severity of ILD among patients. All three components of the 6-min walk test: distance, oxygen saturation before, and oxygen saturation after the test significantly lowered and were independent predictors of severe ILD. |
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AbstractList | Introduction: The prevalence of interstitial lung disease (ILD) is increasing. High-resolution computerized tomography (HRCT), despite having limitations, remains the choice of method for diagnosis and assessment of severity of ILD. Objective: To determine the efficacy of 6-min walk test to assess the severity of the ILD compared to HRCT. Methodology: A cross-sectional study was done among 40 patients with ILD in a tertiary hospital in Hyderabad. The data included age, gender, smoking, HRCT, 6-min walk test, spirometry, diffusion lung capacity and medical history. Mann–Whitney U test, Kruskal–Wallis test, and ROC curve were used to determine the outcomes. Results: The mean age of participants was 57.18 + 13.01 years. 62.5% never smoked. Overall, 50% had severe ILD, and the rest had mild to moderate. The distance walked per 6-min, SpO2 before and SpO2 after, was significantly lower (p = 0.001; 0.002; <0.001, respectively) among patients with severe ILD than mild or moderate. The sensitivity and 1-specificity of the distance walked in 6-min to detect the severity of ILD was 0.90 and 0.31, respectively; sensitivity and 1-specificity of SpO2 before the test was 0.81 and 0.34, while that of SpO2 after the test was 0.90 and 0.17, respectively. Conclusion: This study found that the 6-min walk test is highly sensitive and specific for predicting the severity of ILD among patients. All three components of the 6-min walk test: distance, oxygen saturation before, and oxygen saturation after the test significantly lowered and were independent predictors of severe ILD. Introduction: The prevalence of interstitial lung disease (ILD) is increasing. High-resolution computerized tomography (HRCT), despite having limitations, remains the choice of method for diagnosis and assessment of severity of ILD. Objective: To determine the efficacy of 6-min walk test to assess the severity of the ILD compared to HRCT. Methodology: A cross-sectional study was done among 40 patients with ILD in a tertiary hospital in Hyderabad. The data included age, gender, smoking, HRCT, 6-min walk test, spirometry, diffusion lung capacity and medical history. Mann–Whitney U test, Kruskal–Wallis test, and ROC curve were used to determine the outcomes. Results: The mean age of participants was 57.18 + 13.01 years. 62.5% never smoked. Overall, 50% had severe ILD, and the rest had mild to moderate. The distance walked per 6-min, SpO 2 before and SpO 2 after, was significantly lower ( p = 0.001; 0.002; <0.001, respectively) among patients with severe ILD than mild or moderate. The sensitivity and 1-specificity of the distance walked in 6-min to detect the severity of ILD was 0.90 and 0.31, respectively; sensitivity and 1-specificity of SpO 2 before the test was 0.81 and 0.34, while that of SpO 2 after the test was 0.90 and 0.17, respectively. Conclusion: This study found that the 6-min walk test is highly sensitive and specific for predicting the severity of ILD among patients. All three components of the 6-min walk test: distance, oxygen saturation before, and oxygen saturation after the test significantly lowered and were independent predictors of severe ILD. |
Audience | Academic |
Author | Velisela, Gopala Ansari, Mohammed Soheb Kailasa, Sateesh Pulugundla, Varun Kotha, Naveen Chandra Sompalli, Anantha Sharma, Pawan |
Author_xml | – sequence: 1 fullname: Sompalli, Anantha – sequence: 2 fullname: Kailasa, Sateesh – sequence: 3 fullname: Pulugundla, Varun – sequence: 4 fullname: Kotha, Naveen Chandra – sequence: 5 fullname: Sharma, Pawan – sequence: 6 fullname: Velisela, Gopala – sequence: 7 fullname: Ansari, Mohammed Soheb |
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Title | Assessment of the value of 6-min walk test to predict the severity of interstitial lung disease among Indian patients |
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