Luz María Sánchez-Romero, Francisco Canto-Osorio, Romina González-Morales, M Arantxa Colchero, Shu-Wen Ng, Paula Ramírez-Palacios, Jorge Salmerón, Tonatiuh Barrientos-Gutiérrez
Association between tax on sugar sweetened beverages and soft drink consumption in adults in Mexico: open cohort longitudinal analysis of Health Workers Cohort Study
BMJ (Clinical research ed.)
evaluate possibility using spectral analysis cough sounds diagnosis new coronavirus infection covid19 spectral toussophonobarography performed 218 patients covid19 4856 men 5144 women average age 402 324 510 60 healthy individuals 50 men 50 women average age 417 322 530 induced cough inhalation citric acid solution concentration 20 gl nebulizer recording made using contact microphone located special tripod distance 1520 cm face subject resulting recordings processed computer program spectral analysis cough sounds performed using fourier transform algorithms following parameters cough sounds evaluated duration cough act ms ratio energy low frequencies 60600 hz energy high frequencies 6006000 hz frequency maximum energy cough sound hz statistical processing found parameters cough sound covid19 patients differ cough healthy individuals obtained data substituted developed regression equation rounded integers resulting number following interpretation 0 covid19 1 covid19 technique showed high levels sensitivity specificity addition method characterized sufficient ease use require expensive equipment therefore used practice timely diagnosis covid19