Telemed J E Health - Health monitors for chronic disease by gait analysis with mobile phones.

Tópicos

{ monitor(1329) mobil(1314) devic(1160) }
{ cancer(2502) breast(956) screen(824) }
{ patient(2315) diseas(1263) diabet(1191) }
{ model(3480) simul(1196) paramet(876) }
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{ case(1353) use(1143) diagnosi(1136) }
{ health(3367) inform(1360) care(1135) }
{ age(1611) year(1155) adult(843) }
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Resumo

We have developed GaitTrack, a phone application to detect health status while the smartphone is carried normally. GaitTrack software monitors walking patterns, using only accelerometers embedded in phones to record spatiotemporal motion, without the need for sensors external to the phone. Our software transforms smartphones into health monitors, using eight parameters of phone motion transformed into body motion by the gait model. GaitTrack is designed to detect health status while the smartphone is carried during normal activities, namely, free-living walking. The current method for assessing free-living walking is medical accelerometers, so we present evidence that mobile phones running our software are more accurate. We then show our gait model is more accurate than medical pedometers for counting steps of patients with chronic disease. Our gait model was evaluated in a pilot study involving 30 patients with chronic lung disease. The six-minute walk test (6 MWT) is a major assessment for chronic heart and lung disease, including congestive heart failure and especially chronic obstructive pulmonary disease (COPD), affecting millions of persons. The 6 MWT consists of walking back and forth along a measured distance for 6 minutes. The gait model using linear regression performed with 94.13% accuracy in measuring walk distance, compared with the established standard of direct observation. We also evaluated a different statistical model using the same gait parameters to predict health status through lung function. This gait model has high accuracy when applied to demographic cohorts, for example, 89.22% accuracy testing the cohort of 12 female patients with ages 50-64 years.

Resumo Limpo

develop gaittrack phone applic detect health status smartphon carri normal gaittrack softwar monitor walk pattern use acceleromet embed phone record spatiotempor motion without need sensor extern phone softwar transform smartphon health monitor use eight paramet phone motion transform bodi motion gait model gaittrack design detect health status smartphon carri normal activ name freeliv walk current method assess freeliv walk medic acceleromet present evid mobil phone run softwar accur show gait model accur medic pedomet count step patient chronic diseas gait model evalu pilot studi involv patient chronic lung diseas sixminut walk test mwt major assess chronic heart lung diseas includ congest heart failur especi chronic obstruct pulmonari diseas copd affect million person mwt consist walk back forth along measur distanc minut gait model use linear regress perform accuraci measur walk distanc compar establish standard direct observ also evalu differ statist model use gait paramet predict health status lung function gait model high accuraci appli demograph cohort exampl accuraci test cohort femal patient age year

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