{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T13:40:36Z","timestamp":1790689236015,"version":"4.1.0"},"reference-count":41,"publisher":"American Medical Association (AMA)","issue":"9","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Psychiatry"],"published-print":{"date-parts":[[2024,9,1]]},"abstract":"<jats:sec id=\"ab-yoi240030-4\"><jats:title>Importance<\/jats:title><jats:p>Studies on polygenic risk for psychiatric traits commonly use a disorder-level approach to phenotyping, implicitly considering disorders as homogeneous constructs; however, symptom heterogeneity is ubiquitous, with many possible combinations of symptoms falling under the same disorder umbrella. Focusing on individual symptoms may shed light on the role of polygenic risk in psychopathology.<\/jats:p><\/jats:sec><jats:sec id=\"ab-yoi240030-5\"><jats:title>Objective<\/jats:title><jats:p>To determine whether polygenic scores are associated with all symptoms of psychiatric disorders or with a subset of indicators and whether polygenic scores are associated with comorbid phenotypes via specific sets of relevant symptoms.<\/jats:p><\/jats:sec><jats:sec id=\"ab-yoi240030-6\"><jats:title>Design, Setting, and Participants<\/jats:title><jats:p>Data from 2 population-based cohort studies were used in this cross-sectional study. Data from children in the Avon Longitudinal Study of Parents and Children (ALSPAC) were included in the primary analysis, and data from children in the Twins Early Development Study (TEDS) were included in confirmatory analyses. Data analysis was conducted from October 2021 to January 2024. Pregnant women based in the Southwest of England due to deliver in 1991 to 1992 were recruited in ALSPAC. Twins born in 1994 to 1996 were recruited in TEDS from population-based records. Participants with available genetic data and whose mothers completed the Short Mood and Feelings Questionnaire and the Strength and Difficulties Questionnaire when children were 11 years of age were included.<\/jats:p><\/jats:sec><jats:sec id=\"ab-yoi240030-7\"><jats:title>Main Outcomes and Measures<\/jats:title><jats:p>Psychopathology relevant symptoms, such as hyperactivity, prosociality, depression, anxiety, and peer and conduct problems at age 11 years. Psychological networks were constructed including individual symptoms and polygenic scores for depression, anxiety, attention-deficit\/hyperactivity disorder (ADHD), body mass index (BMI), and educational attainment in ALSPAC. Following a preregistered confirmatory analysis, network models were cross-validated in TEDS.<\/jats:p><\/jats:sec><jats:sec id=\"ab-yoi240030-8\"><jats:title>Results<\/jats:title><jats:p>Included were 5521 participants from ALSPAC (mean [SD] age, 11.8 [0.14] years; 2777 [50.3%] female) and 4625 participants from TEDS (mean [SD] age, 11.27 [0.69] years; 2460 [53.2%] female). Polygenic scores were preferentially associated with restricted subsets of core symptoms and indirectly associated with other, more distal symptoms of psychopathology (network edges ranged between <jats:italic>r<\/jats:italic>\u2009=\u2009\u22120.074 and <jats:italic>r<\/jats:italic>\u2009=\u20090.073). Psychiatric polygenic scores were associated with specific cross-disorder symptoms, and nonpsychiatric polygenic scores were associated with a variety of indicators across disorders, suggesting a potential contribution of nonpsychiatric traits to comorbidity. For example, the polygenic score for ADHD was associated with a core ADHD symptom, being easily distracted (<jats:italic>r<\/jats:italic>\u2009=\u20090.07), and the polygenic score for BMI was associated with symptoms across disorders, including being bullied (<jats:italic>r<\/jats:italic>\u2009=\u20090.053) and not thinking things out (<jats:italic>r<\/jats:italic>\u2009=\u20090.041).<\/jats:p><\/jats:sec><jats:sec id=\"ab-yoi240030-9\"><jats:title>Conclusions and Relevance<\/jats:title><jats:p>Genetic associations observed at the disorder level may hide symptom-level heterogeneity. A symptom-level approach may enable a better understanding of the role of polygenic risk in shaping psychopathology and comorbidity.<\/jats:p><\/jats:sec>","DOI":"10.1001\/jamapsychiatry.2024.1403","type":"journal-article","created":{"date-parts":[[2024,6,12]],"date-time":"2024-06-12T15:01:25Z","timestamp":1718204485000},"page":"902","source":"Crossref","is-referenced-by-count":20,"title":["Polygenic Scores and Networks of Psychopathology Symptoms"],"prefix":"10.1001","volume":"81","author":[{"given":"Giulia G.","family":"Piazza","sequence":"first","affiliation":[{"name":"Department of Clinical, Educational and Health Psychology, University College London, London, United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrea G.","family":"Allegrini","sequence":"additional","affiliation":[{"name":"Department of Clinical, Educational and Health Psychology, University College London, London, United Kingdom"},{"name":"Social Genetic and Developmental Psychiatry, 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