Objective  To study the relationship between the changes of short-term health-related life quality and the improvement/deterioration of forced expiratory volume in one second (FEV₁) in patients with chronic obstructive pulmonary disease (COPD), and explore the feasibility of planning the frequency of pulmonary function test by evaluating the changes of life quality of COPD patients. Methods  Based on the change of FEV₁ (△FEV₁), COPD patients from the standardized COPD and asthma management project database and its extended database of the center for chronic airway disease management, from 2020 to now, who completed pulmonary function tests and St. George's Respiratory Questionnaire (SGRQ) twice with an interval of 28 days, were divided into △FEV₁ improvement group, △FEV₁ deterioration group and △FEV₁ maintenance group. The differences of SGRQ scores in different △FEV₁ groups were analyzed, and the high-risk factors of △FEV₁ deterioration group and the importance of influencing factors of △FEV₁ deterioration were analyzed by neural network. Results  A total of 1233 patients were included in the analysis. There were significant differences in △SGRQ total score, △SGRQ symptom, △SGRQ activity and △SGRQ impacts among △FEV₁ groups (P<0.05). Compared with the △FEV₁ maintenance group, the △FEV₁ improvement group showed clinically significant improvement in both the total SGRQ score and each sub score, and the improvement value was more than 4 points. While the △FEV₁ deterioration group showed statistically significant difference in the total SGRQ score and each sub score, but only showed clinically significant deterioration in the SGRQ symptom sub evaluation. Logistic regression model showed that the risk factors of △FEV₁ deterioration included female (OR=2.11, 95%CI 1.23 - 3.59, P=0.006), baseline FEV₁ (OR=2.63, 95%CI 1.92 - 3.60, P<0.001), △SGRQ (OR=1.02, 95%CI 1.01 - 1.03, P<0.001), baseline SGRQ symptom (OR=1.02, 95%CI 1.01 - 1.02, P<0.001) and △SGRQ symptom (OR=1.02, 95%CI 1.01 - 1.03, P<0.001), further neural network analysis showed that the importance orders of the five variables were △SGRQ total score (100.0%), △SGRQ symptom (86.9%), baseline FEV₁ (71.4%), baseline SGRQ symptom (56.6%) and gender (29.6%). Conclusions  The variables of short-term health-related life quality assessment of COPD patients are helpful to predict the changes of pulmonary function improvement, but the ability to predict the changes of pulmonary function deterioration is limited. For patients with no changes or improvement in short-term health-related life quality assessment, it is still recommended to increase the frequency of pulmonary function test in order to detect the deterioration of pulmonary function early.

Citation： ZHANG Qiao, LI Hong, WANG Qinqin, LIU Lingjun, MA Qianli. Relationship of the changes between short-term life quality and forced expiratory volume in one second of pulmonary function in COPD patients. Chinese Journal of Respiratory and Critical Care Medicine, 2022, 21(4): 230-235. doi: 10.7507/1671-6205.202203034 Copy