Ensemble averaging for categorical variables: Validation study of imputing lost data in 24-h recorded postures of inpatients.

ABSTRACT: Acceleration sensors are widely used in consumer wearable devices and smartphones. Postures estimated from recorded accelerations are commonly used as features indicating the activities of patients in medical studies. However, recording for over 24 h is more likely to result in data losses than recording for a few hours, especially when consumer-grade wearable devices are used. Here, to impute postures over a period of 24 h, we propose an imputation method that uses ensemble averaging. This method outputs a time series of postures over 24 h with less lost data by calculating the ratios of postures taken at the same time of day during several measurement-session days. Whereas conventional imputation methods are based on approaches with groups of subjects having multiple variables, the propo

SUBMITTER: Ogasawara T 

PROVIDER: S-EPMC9910696 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature