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Time Series Visualizations of Mobile Phone-Based Daily Diary Reports of Stress, Physical Activity, and Diet Quality in Mostly Ethnic Minority Mothers: Feasibility Study

Time Series Visualizations of Mobile Phone-Based Daily Diary Reports of Stress, Physical Activity, and Diet Quality in Mostly Ethnic Minority Mothers: Feasibility Study

The second analytic method provides a formal statistical algorithm, referred to as changepoint analysis, to locate changepoints. Changepoint analysis formulates a maximum likelihood-based test statistic that rejects a null hypothesis that no changepoints are present in the time series data if the statistic is greater than a specified threshold.

W Scott Comulada, Dallas Swendeman, Roxana Rezai, Nithya Ramanathan

JMIR Form Res 2018;2(2):e11062