The Young Adult Sleep model: an evolving causal loop diagram of mental health dynamics.

The Young Adult Sleep CLD comprises 29 variables and 175 causal connections spanning biological, psychological, behavioral, and social domains.

• The model integrates 'extensively interconnected variables across biological, psychological, behavioral, and social domains'
• The CLD contains 29 variables and 175 causal connections
• The model was developed through five asynchronous questionnaire-based assignments completed by a panel of 14 domain experts
• Two existing CLDs and targeted reviews of the scientific literature were also incorporated into the development process

The CLD was developed using a multi-method approach combining expert panel assignments, existing CLDs, literature reviews, and natural language processing.

• A panel of 14 domain experts completed five asynchronous questionnaire-based assignments
• Natural language processing was used to curate the system variables from questionnaire data
• Two existing CLDs were incorporated into the development process
• Targeted reviews of the scientific literature were conducted to inform the model

The CLD contains numerous reinforcing feedback loops that can drive 'vicious' cycles, including the interplay of sleep disturbances and affective depressive symptoms with addictive behaviors like smoking.

• The model forms 'numerous reinforcing feedback loops that can drive vicious cycles'
• An example vicious cycle identified is 'the interplay of sleep disturbances and affective depressive symptoms with addictive behaviors like smoking'
• Experts also identified balancing loops that may counteract these self-reinforcing dynamics
• Many loops span multiple domains, underscoring the importance of multidomain interventions

Sleep problems and affective depressive symptoms in young adults were identified as the central public health challenge motivating the model.

• The model focuses on 'sleep problems and affective depressive symptoms in young adults'
• These were characterized as 'an urgent public health challenge'
• The model targets young adults specifically as the population of interest

The Young Adult Sleep model is designed as an evolving framework intended for iterative refinement and future computational modeling to simulate intervention strategies.

• The CLD is described as 'an evolving CLD framework that is intended to be further refined as new evidence becomes available'
• It 'supports iterative theory development and hypothesis generation'
• The model 'serves as a foundation for future computational modeling to simulate intervention strategies'
• The interdisciplinary nature of the model underscores 'the importance of interdisciplinary research that synthesizes evidence across scientific fields'