TY - JOUR T1 - Respiratory muscle strength: a systematic review with equation testing in Portuguese healthy adults JF - European Respiratory Journal JO - Eur Respir J DO - 10.1183/13993003.congress-2019.PA2193 VL - 54 IS - suppl 63 SP - PA2193 AU - Sara Souto-Miranda AU - Cristina Jácome AU - Ana Alves AU - Ana Machado AU - Cátia Paixão AU - Ana Oliveira AU - Liliana Santos AU - Alda Marques Y1 - 2019/09/28 UR - http://erj.ersjournals.com/content/54/suppl_63/PA2193.abstract N2 - Respiratory muscle weakness is frequent in chronic respiratory diseases. Several equations exist to predict maximum respiratory pressures but there are no recommendations of which should be used and none was developed for Portugal.This study revised predictive equations of maximum inspiratory (MIP) and expiratory (MEP) pressure for healthy adults and explored their suitability for the Portuguese population.A systematic review was conducted. Studies were eligible if they presented at least 1 equation for MIP or MEP developed for healthy adults. For equation testing, MIP/MEP were collected from healthy adults. Predicted values were computed from the equations and compared with actual values using Wilcoxon tests and Bland-Altman plots.19 studies were included. 36 MIP and 30 MEP equations were found but only 32 and 25 were possible to test in 229 subjects (62%♂, 101.8±20.5FEV1pp, 66.7±9.7yrs). 4 MIP equations showed no significant differences between actual and predicted values (p>0.05, rs=0.32-0.47, R2=9-47%). From these, 3 overestimated (bias=0.19-4.06 cmH2O, men) and 1 underestimated (bias=0.99 cmH2O, women) the actual values (Fig. 1). All MEP equations showed significant differences between actual and predicted values.Only 4 MIP equations seem to be useful for the Portuguese population. Future studies should aim to develop an equation for the Portuguese population with higher coefficients of determination.FootnotesCite this article as: European Respiratory Journal 2019; 54: Suppl. 63, PA2193.This is an ERS International Congress abstract. No full-text version is available. Further material to accompany this abstract may be available at www.ers-education.org (ERS member access only). ER -