Late Breaking Abstract - Changes in spirometry interpretative strategies. Knowledge and perception in health care workers of LATAM

<bold>Introduction:</bold> In 2021, ATS/ERS updated interpretative strategies for PFT, introducing notable changes in previous algorithms. <bold>Aim:</bold> Determine the knowledge and perceptions of 2005 and 2021 spirometry standards among Latin American healthcare workers and the risk of non-pulmonologists not recognizing the changes. <bold>Methods:</bold> We conducted a cross-sectional study with a survey among Latin-American healthcare workers who attended spirometry certifications in 2023-2024. We included questions on spirometry expertise, ATS/ERS standards knowledge, and personal opinions on the changes. We used logistic regression for analysis. <bold>Results:</bold> Among 405 respondents, 56.3% were female, and 50.9% were 26-35 years (Table 1). 14.3% and 32.1% of those performing more than 25 spirometries per month were unaware of the 2005 and 2022 standards, respectively. 66.2% use the LLN of the FEV1/FVC ratio for diagnosis. However, only 59.3% identified the disadvantages of a fixed cutoff point, and non-pulmonologists had a higher risk of not identifying it (OR 3.04) and not understanding z-scores (OR 5.01). 50.62% had a favorable opinion of the changes. <bold>Conclusion:</bold> More knowledge and understanding of updated spirometry standards are needed, especially among non-pulmonologists. Table 1. Respondent´s traits <table-wrap><object-id>erj;64/suppl_68/PA2610/TB1</object-id><object-id>T1</object-id><object-id>TB1</object-id><table><colgroup><col></col><col></col><col></col></colgroup><tbody><tr><td>Variables</td><td>N=405</td><td>%</td></tr><tr><td>Mexico</td><td>248</td><td>61.2</td></tr><tr><td>Other LATAM countries</td><td>157</td><td>38.8</td></tr><tr><td>Profession</td><td></td><td></td></tr><tr><td>Pulmonologist</td><td>170</td><td>42</td></tr><tr><td>Non-pulmonologist</td><td>235</td><td>58</td></tr><tr><td>Monthly spirometry test</td><td></td><td></td></tr><tr><td><25</td><td>257</td><td>63.5</td></tr><tr><td>>25</td><td>112</td><td>27.7</td></tr><tr><td>Knowledge of the ATS/ERS interpretative standardization</td><td></td><td></td></tr><tr><td>Yes (2005)</td><td>258</td><td>63.7</td></tr><tr><td>Yes (2021)</td><td>202</td><td>49.9</td></tr><tr><td>Identifies new patterns</td><td></td><td></td></tr><tr><td>Restrictive</td><td>333</td><td>82.2</td></tr><tr><td>Non-specific</td><td>203</td><td>50.1</td></tr><tr><td>Dysanapsis</td><td>246</td><td>60.7</td></tr><tr><td>Identifies changes in:</td><td></td><td></td></tr><tr><td>BD response</td><td>263</td><td>65</td></tr><tr><td>Z-score concept</td><td>271</td><td>67</td></tr></tbody></table></table-wrap>