{"doi":"10.1002/oby.23281","title":"Longitudinal associations between facets of sleep and adiposity in youth","abstract":"OBJECTIVE: Beyond sleep duration, other facets of sleep such as variability and timing may be associated with obesity risk in youth. However, data are limited. Using a longitudinal design, this study tested whether multiple facets of sleep were associated with fat mass gain over 1 year. METHODS: A convenience sample of non-treatment-seeking youth (age 8-17 years) wore actigraphy monitors for 14 days. Average weekly sleep duration, within-person sleep duration variability, weekend catch-up sleep, bedtime and wake time shift, social jet lag, bedtime, wake time, and sleep midpoint were calculated. The association of each facet of baseline sleep with 1-year fat mass, adjusting for baseline fat mass and height, was examined. RESULTS: A total of 137 youths (54.0% female; mean [SD], age 12.5 [2.6] years; 28.4% non-Hispanic Black or African American; baseline fat mass = 15.3 [8.9] kg; 1-year fat mass = 17.0 [10.0] kg; 28.5% with baseline overweight or obesity) were studied. Wake time (p = 0.03) and sleep midpoint (p = 0.02) were inversely associated with 1-year fat mass, such that earlier wake time and midpoint were associated with higher 1-year fat mass. No other facet of sleep was significantly associated with 1-year fat mass (p > 0.09). CONCLUSIONS: Using objective measures, youth with earlier wake times and sleep midpoints had greater gains in fat mass. Additional research is needed to determine whether sleep timing may be a modifiable target to prevent pediatric obesity.","journal":"Obesity","year":2021,"id":178884,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":19,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9137,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2021-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":276850,"name":"Natasha A. Schvey","orcid":"0000-0002-3136-6713","position":1,"is_corresponding":false},{"id":422627,"name":"Nichole R. Kelly","orcid":"0000-0003-0812-4182","position":2,"is_corresponding":false},{"id":422628,"name":"Megan N. Parker","orcid":"0000-0003-2511-199X","position":3,"is_corresponding":false},{"id":422624,"name":"Eliana María Hernández Ramírez","orcid":"0000-0001-8620-6496","position":4,"is_corresponding":false},{"id":422622,"name":"Lisa M. Shank","orcid":"0000-0002-6922-7946","position":5,"is_corresponding":false},{"id":402282,"name":"Meghan E. Byrne","orcid":"0000-0002-4745-649X","position":6,"is_corresponding":false},{"id":422623,"name":"Taylor N. Swanson","orcid":"0000-0001-7161-4980","position":7,"is_corresponding":false},{"id":717514,"name":"Esther A. Kwarteng","orcid":null,"position":8,"is_corresponding":false},{"id":716956,"name":"Loie M. Faulkner","orcid":"0009-0001-8494-3617","position":9,"is_corresponding":false},{"id":717513,"name":"Kweku G. Djan","orcid":null,"position":10,"is_corresponding":false},{"id":434576,"name":"Anna Zenno","orcid":"0000-0001-7502-6422","position":11,"is_corresponding":false},{"id":402284,"name":"Sheila M. Brady","orcid":"0000-0002-2333-3575","position":12,"is_corresponding":false},{"id":272693,"name":"Shanna Yang","orcid":null,"position":13,"is_corresponding":false},{"id":367546,"name":"Susan Z. Yanovski","orcid":"0000-0002-6843-1670","position":14,"is_corresponding":false},{"id":276849,"name":"Marian Tanofsky‐Kraff","orcid":"0000-0003-3871-2233","position":15,"is_corresponding":false},{"id":402285,"name":"Jack A. Yanovski","orcid":"0000-0001-8542-1637","position":16,"is_corresponding":false},{"id":422626,"name":"Sarah LeMay‐Russell","orcid":"0000-0002-8033-657X","position":0,"is_corresponding":true}],"reference_count":47,"raw_metadata":null,"created_at":"2026-07-18T23:47:44.875897Z","pmid":"34734495","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}