{"id":"W2890784705","doi":"10.1093/aje/kwy195","title":"Invited Commentary: Promise and Pitfalls of the Sibling Comparison Design in Studies of Optimal Birth Spacing","year":2018,"lang":"en","type":"letter","venue":"American Journal of Epidemiology","topic":"Reproductive Health and Contraception","field":"Medicine","cited_by":13,"is_retracted":false,"has_abstract":true,"ca_institutions":"McGill University; University of British Columbia","funders":"Faculty of Medicine, University of British Columbia; Faculty of Medicine, McGill University; McGill University","keywords":"Observational study; Sibling; Confounding; Medicine; Confidence interval; Pregnancy; Socioeconomic status; Demography; Pediatrics; Population; Psychology; Developmental psychology; Environmental health","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.005238859,0.0002109512,0.002592215,0.0004155118,0.00003823375,0.00000123709,0.0001508007,0.0001589258,0.000003997049],"category_scores_gemma":[0.005842078,0.000128663,0.0001604011,0.0003191804,0.001665981,0.00004514273,0.00006013387,0.001435051,1.731982e-7],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0001213519,"about_ca_system_score_gemma":0.00009211044,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0003071785,"about_ca_topic_score_gemma":0.00001006787,"domain_scores_codex":[0.9944316,0.002944915,0.001847332,0.0002574194,0.0001741774,0.0003445456],"domain_scores_gemma":[0.9912575,0.003656334,0.004270223,0.0003004444,0.0004400329,0.00007538834],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"not_applicable","study_design_gemma":"observational","study_design_scores_codex":[0.001765945,0.00009952387,0.4464983,0.000540832,0.0005702628,0.00003059262,0.001790114,0.000312598,0.001080408,0.000001734555,0.5409355,0.006374225],"study_design_scores_gemma":[0.01446869,0.0580487,0.6240973,0.01700721,0.003027689,0.002770393,0.02023898,0.003523541,0.00315282,0.002303766,0.2500424,0.001318503],"study_design_candidate":"observational","study_design_consensus":null,"genre_codex":"commentary","genre_gemma":"commentary","genre_scores_codex":[0.4503143,0.003876072,0.001101278,0.5442032,0.0001780072,0.0003200462,0.000003194734,0.000001850128,0.000002022277],"genre_scores_gemma":[0.2799012,0.003251824,0.02322481,0.690951,0.002611924,0.00001015641,0.000006521514,0.00003348726,0.000009019893],"genre_candidate":"commentary","genre_consensus":"commentary","teacher_disagreement_score":0.2908931,"threshold_uncertainty_score":0.6993935,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.1348447217893822,"score_gpt":0.4131488187763322,"score_spread":0.27830409698695,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}