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Combining Ecological Momentary Assessment and Social Network Analysis to Study Youth Physical Activity and Environmental Influences: Protocol for a Mixed Methods Feasibility Study

Combining Ecological Momentary Assessment and Social Network Analysis to Study Youth Physical Activity and Environmental Influences: Protocol for a Mixed Methods Feasibility Study

One promising approach to capturing this variability is through the identification of “phenotypes,” individual-specific webs of links between social and built environmental determinants [14,15]. These phenotypes have the potential to identify overlaps in ILD and salient intervention targets for health behavior [14-16].

Tyler Prochnow, Genevieve F Dunton, Kayla de la Haye, Keshia M Pollack Porter, Chanam Lee

JMIR Res Protoc 2025;14:e68667

Digital Phenotypes of Mobile Keyboard Backspace Rates and Their Associations With Symptoms of Mood Disorder: Algorithm Development and Validation

Digital Phenotypes of Mobile Keyboard Backspace Rates and Their Associations With Symptoms of Mood Disorder: Algorithm Development and Validation

Deriving digital phenotypes can facilitate efficient clinical decision-making. Whereas passive sensing data are continuous (eg, backspace rates can be any value between 0 and 1), clinical decisions are often discrete (eg, treat or not to treat with medication or psychotherapy). Digital phenotypes are ecologically valid, data-driven, and require low patient burden [1,39].

Qimin Liu, Emma Ning, Mindy K Ross, Andrea Cladek, Sarah Kabir, Amruta Barve, Ellyn Kennelly, Faraz Hussain, Jennifer Duffecy, Scott A Langenecker, Theresa M Nguyen, Theja Tulabandhula, John Zulueta, Alexander P Demos, Alex Leow, Olusola Ajilore

J Med Internet Res 2024;26:e51269

Development and Initial Evaluation of a Digital Phenotype Collection System for Adolescents: Proof-of-Concept Study

Development and Initial Evaluation of a Digital Phenotype Collection System for Adolescents: Proof-of-Concept Study

Passive digital phenotypes, which encompass various aspects such as location, activity, sleep, and smartphone use, have shown meaningful correlations with mental health states, facilitating the identification of risk levels and timely interventions [34-37]. However, collecting passive digital phenotypes presents several challenges. One significant issue is the potential for noise due to sensor dysfunction or disconnection, which can introduce inaccuracies in the collected data [38].

Minseo Cho, Doeun Park, Myounglee Choo, Jinwoo Kim, Doug Hyun Han

JMIR Form Res 2024;8:e59623

Assessing the Effect of Electronic Health Record Data Quality on Identifying Patients With Type 2 Diabetes: Cross-Sectional Study

Assessing the Effect of Electronic Health Record Data Quality on Identifying Patients With Type 2 Diabetes: Cross-Sectional Study

The ongoing challenge of understanding the effect of key data quality issues on T2 D phenotypes is further exacerbated by the fact that T2 D phenotypes use multiple data types, such as diagnosis codes, medications, and laboratory results. Additionally, given the variability of key data quality issues of these data types across EHRs [10,11], measuring the effect of key existing data quality issues on T2 D phenotypes in one EHR may not translate into generalizable findings.

Priyanka Dua Sood, Star Liu, Harold Lehmann, Hadi Kharrazi

JMIR Med Inform 2024;12:e56734

Social Determinants of Health Phenotypes and Cardiometabolic Condition Prevalence Among Patients in a Large Academic Health System: Latent Class Analysis

Social Determinants of Health Phenotypes and Cardiometabolic Condition Prevalence Among Patients in a Large Academic Health System: Latent Class Analysis

This approach uses multiple indicators to identify homogeneous subgroups—or phenotypes—with similar characteristics within a heterogeneous population [25]; these phenotypes usually have distinct features that result in divergent outcomes [26,27], such as differential treatment effects by phenotype [28].

Carrie R Howell, Li Zhang, Olivio J Clay, Gareth Dutton, Trudi Horton, Michael J Mugavero, Andrea L Cherrington

JMIR Public Health Surveill 2024;10:e53371

Leveraging Machine Learning to Develop Digital Engagement Phenotypes of Users in a Digital Diabetes Prevention Program: Evaluation Study

Leveraging Machine Learning to Develop Digital Engagement Phenotypes of Users in a Digital Diabetes Prevention Program: Evaluation Study

To expand on the previous investigation, improved features of the next generation of PAMS include an ML-based patient engagement prediction algorithm to identify d DPP digital engagement phenotypes and to guide and further personalize the messaging intervention.

Danissa V Rodriguez, Ji Chen, Ratnalekha V N Viswanadham, Katharine Lawrence, Devin Mann

JMIR AI 2024;3:e47122

Cluster Analysis of Primary Care Physician Phenotypes for Electronic Health Record Use: Retrospective Cohort Study

Cluster Analysis of Primary Care Physician Phenotypes for Electronic Health Record Use: Retrospective Cohort Study

In this study, we propose to use audit log data for the de novo identification of EHR user types (ie, EHR use phenotypes). Phenotype was first introduced by Richesson et al [19] as a biological concept to describe a set of observable biological traits. In the context of EHR use measures, phenotype will be used to describe observable use patterns across gender and specialty differences as defined by an unsupervised clustering approach called affinity propagation.

Allan Fong, Mark Iscoe, Christine A Sinsky, Adrian D Haimovich, Brian Williams, Ryan T O'Connell, Richard Goldstein, Edward Melnick

JMIR Med Inform 2022;10(4):e34954

Enhancing Obstructive Sleep Apnea Diagnosis With Screening Through Disease Phenotypes: Algorithm Development and Validation

Enhancing Obstructive Sleep Apnea Diagnosis With Screening Through Disease Phenotypes: Algorithm Development and Validation

Age strata and BMI were found to be different among clusters (P On the basis of the description of clusters mentioned earlier, the OSA phenotypes can be defined. We classified patients into low (cluster 1), medium (cluster 2), and high (cluster 3) severity phenotypes, as their median AHI corresponded to mild, moderate, and severe levels respectively, defined in PSG for OSA diagnosis.

Daniela Ferreira-Santos, Pedro Pereira Rodrigues

JMIR Med Inform 2021;9(6):e25124

Identifying Principles for the Construction of an Ontology-Based Knowledge Base: A Case Study Approach

Identifying Principles for the Construction of an Ontology-Based Knowledge Base: A Case Study Approach

We use a knowledge base prototype instead of a knowledge base because we include different levels of facts in Onto KBCF, for example, nucleotide changes, amino acid changes, and clinical phenotypes.

Xia Jing, Nicholas R Hardiker, Stephen Kay, Yongsheng Gao

JMIR Med Inform 2018;6(4):e52