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10.1371/journal.pone.0248920 http://scihub22266oqcxt.onion/10.1371/journal.pone.0248920 33765050!7993758!33765050     free     free     free Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       PLoS+One 2021 ; 16 (3): e0248920 Nephropedia Template TP {{tp|p=33765050|t=2021. App-based symptom tracking to optimize SARS-CoV-2 testing strategy using machine learning |pdf=|usr=}}{{33765050}} gab.com Text App-based symptom tracking to optimize SARS-CoV-2 testing strategy using machine learning JO: PLoS One http://www.kidney.de/pget.php?&tw=1&pmid=33765050 #FOAvip BACKGROUND: Tests are scarce resources, especially in low and middle-income countries, and the optimization of testing programs during a pandemic is critical for the effectiveness of the disease control. Hence, we aim to use the combination of symptoms to build a predictive model as a screening tool to identify people and areas with a higher risk of SARS-CoV-2 infection to be prioritized for testing. MATERIALS AND METHODS: We performed a retrospective analysis of individuals registered in "Dados do Bem," a Brazilian app-based symptom tracker. We applied machine learning techniques and provided a SARS-CoV-2 infection risk map of Rio de Janeiro city. RESULTS: From April 28 to July 16, 2020, 337,435 individuals registered their symptoms through the app. Of these, 49,721 participants were tested for SARS-CoV-2 infection, being 5,888 (11.8%) positive. Among self-reported symptoms, loss of smell (OR[95%CI]: 4.6 [4.4-4.9]), fever (2.6 [2.5-2.8]), and shortness of breath (2.1 [1.6-2.7]) were independently associated with SARS-CoV-2 infection. Our final model obtained a competitive performance, with only 7% of false-negative users predicted as negatives (NPV = 0.93). The model was incorporated by the "Dados do Bem" app aiming to prioritize users for testing. We developed an external validation in the city of Rio de Janeiro. We found that the proportion of positive results increased significantly from 14.9% (before using our model) to 18.1% (after the model). CONCLUSIONS: Our results showed that the combination of symptoms might predict SARS-Cov-2 infection and, therefore, can be used as a tool by decision-makers to refine testing and disease control strategies. Twit Text FOAVip App-based symptom tracking to optimize SARS-CoV-2 testing strategy using machine learning ????PLoS One http://www.kidney.de/pget.php?&tw=1&pmid=33765050 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=33765050 #FOAvip English Wikipedia <ref>{{Cite pmid|33765050}}</ref> App-based symptom tracking to optimize SARS-CoV-2 testing strategy using machine learning #MMPMID33765050 Dantas LF; Peres IT; Bastos LSL; Marchesi JF; de Souza GFG; Gelli JGM; Baiao FA; Macaira P; Hamacher S; Bozza FA PLoS One 2021[]; 16 (3): e0248920 PMID33765050show ga BACKGROUND: Tests are scarce resources, especially in low and middle-income countries, and the optimization of testing programs during a pandemic is critical for the effectiveness of the disease control. Hence, we aim to use the combination of symptoms to build a predictive model as a screening tool to identify people and areas with a higher risk of SARS-CoV-2 infection to be prioritized for testing. MATERIALS AND METHODS: We performed a retrospective analysis of individuals registered in "Dados do Bem," a Brazilian app-based symptom tracker. We applied machine learning techniques and provided a SARS-CoV-2 infection risk map of Rio de Janeiro city. RESULTS: From April 28 to July 16, 2020, 337,435 individuals registered their symptoms through the app. Of these, 49,721 participants were tested for SARS-CoV-2 infection, being 5,888 (11.8%) positive. Among self-reported symptoms, loss of smell (OR[95%CI]: 4.6 [4.4-4.9]), fever (2.6 [2.5-2.8]), and shortness of breath (2.1 [1.6-2.7]) were independently associated with SARS-CoV-2 infection. Our final model obtained a competitive performance, with only 7% of false-negative users predicted as negatives (NPV = 0.93). The model was incorporated by the "Dados do Bem" app aiming to prioritize users for testing. We developed an external validation in the city of Rio de Janeiro. We found that the proportion of positive results increased significantly from 14.9% (before using our model) to 18.1% (after the model). CONCLUSIONS: Our results showed that the combination of symptoms might predict SARS-Cov-2 infection and, therefore, can be used as a tool by decision-makers to refine testing and disease control strategies. |*Machine Learning[MESH] |Adult[MESH] |Anosmia/etiology[MESH] |Brazil[MESH] |COVID-19 Testing[MESH] |COVID-19/complications/*diagnosis/virology[MESH] |Dyspnea/etiology[MESH] |False Negative Reactions[MESH] |False Positive Reactions[MESH] |Female[MESH] |Fever/etiology[MESH] |Humans[MESH] |Male[MESH] |Middle Aged[MESH] |Mobile Applications[MESH] |Registries[MESH] |Retrospective Studies[MESH] |Risk[MESH] |SARS-CoV-2/isolation & purification[MESH]App-based symptom tracking to optimize SARS-CoV-2 testing strategy usi(epmc).pdf DeepDyve Pubget Overpricing