Intra-Rater Reliability of Desktop Spirometry in Adults with Type 2 Diabetes Mellitus

Abstract

Objective: To evaluate the inter-rater reliability of desktop spirometry in adult patients with type 2 diabetes mellitus (T2DM) attending public sector hospital in Panchkula, India. Methods: Thirty eligible participants with T2DM completed study at government hospital, Panchkula from February 2019 to August 2019. The study was having co-relational design. Pulmonary function test (PFT) was performed twice by each participant through desktop spirometer. T2DM patients aged between 40-64 years with diabetes duration ≥ 1 year were included into the study. Statistical analysis was done using SPSS version 21 and Microsoft excel.Results: Of 30 participants, the mean age of the participants was 51.537.5 ± years. There were 19 (63.33%) females and 11 (36.7%) males. Mean difference between test-retest came out to be 0.08, 0.035, and -0.93 for Forced Vital Capacity (FVC), Forced expiratory volume in 1st second (FEV1) and % FEV1/FVC respectively. The difference was not significant for FEV1 and % FEV1/FVC with p-value=0.270 & 0.340 respectively. However, it was significant for FVC with p-value=0.030. Intraclass correlation was 0.959, 0.94, and 0.89 for FVC, FEV1 and % FEV1/FVC respectively. Minimal detectable change was 0.3, 0.3, and 8 for FVC, FEV1, FEV1/FVC respectively. Conclusion: This can be concluded from the results that desktop spirometer has good absolute and relative reliability. Therefore, it can be used at the primary health care setting for the evaluation of pulmonary functions of adult patients with T2DM.