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Cristina Rebordosa, 1 Estel Plana, 1 Annalisa Rubino, 2 Jaume Aguado, 1 Alejhandra Lei, 3 Sami Daoud, 4 Nuria Saigi-Morgui, 1 Susana Perez-Gutthann, 1 Elena Rivero-Ferrer 1 1RTI Health Solutions, Barcelona, Spain; 2Epidemiology, Respiratory and Immunology, AstraZeneca, Cambridge, UK; 3Patient Safety Biopharma, AstraZeneca, Barcelona, Spain; 4BioPharmaceuticals Research and Development, Late-Stage Development Research and Innovation, AstraZeneca, Gaithersburg, MD, USACorrespondence: Cristina RebordosaRTI Health Solutions, Av. Diagonal, 605, 9-1, Barcelona, 08028, SpainTel +34 93 241 7766Fax +34 93 760 8507Email crebordosa@rti.orgBackground: The long-acting anticholinergic (LAMA) aclidinium was approved in Europe in 2012 to relieve symptoms in adults with chronic obstructive pulmonary disease (COPD). A Post-Authorisation Safety Study (PASS) was initiated to assess potential cardiovascular safety concerns for aclidinium.Objective: To estimate the adjusted incidence rate ratio (IRR) for hospitalisation for heart failure in patients with COPD who were new users of aclidinium, tiotropium, other LAMA, long-acting beta-agonists/inhaled corticosteroids (LABA/ICS), and LAMA/LABA were compared with initiators of LABA.Methods: This population-based cohort study included patients with COPD aged ≥ 40 years initiating COPD medications in the Clinical Practice Research Datalink (CPRD) GOLD in the United Kingdom from 2012 to 2017. Medications were identified via general practice prescriptions. The first-ever hospitalisations for heart failure were identified in the Hospital Episode Statistics, and general practitioner records from the CPRD. Poisson regression models were used to estimate the IRR for hospitalisation for heart failure in users of COPD medications versus LABA, adjusting for clinically relevant covariates.Results: The study included 4350 new users of aclidinium, 23,405 of tiotropium, 6977 of other LAMAs, 3122 of LAMA/LABA, 26,093 of LABA/ICS, and 5678 of LABA. Mean age was 69– 70 years across medication groups. Aclidinium users had the highest proportion of severe COPD, and LABA users had the lowest (35% vs 19%, respectively). Crude incidence rates per 1000 person-years for the first-ever hospitalisation for heart failure ranged from 6.9 in LABA to 9.5 in aclidinium. Using LABA as reference, adjusted IRRs (95% confidence interval) for first-ever hospitalisation for heart failure were 0.90 (0.53– 1.53) for aclidinium, 1.02 (0.69– 1.51) for tiotropium, 0.86 (0.50– 1.47) for other LAMAs, 1.09 (0.41– 2.92) for LAMA/LABA, and 1.01 (0.69, 1.48) for LABA/ICS.Conclusion: The study did not find increased risks of hospitalisations for heart failure in new users of aclidinium, tiotropium, other LAMAs, LAMA/LABA, and LABA/ICS compared with LABA.Keywords: aclidinium, LAMA, heart failure, United Kingdom

Background: Acetaminophen is extensively used during pregnancy. But there is a lack of population-representative cohort studies evaluating its effects on a range of neuropsychological and behavioural endpoints. We aimed to assess whether prenatal exposure to acetaminophen is adversely associated with neurodevelopmental outcomes at 1 and 5 years of age. Methods: This Spanish birth cohort study included 2644 mother-child pairs recruited during pregnancy. The proportion of liveborn participants evaluated at 1 and 5 years was 88.8% and 79.9%, respectively. Use of acetaminophen was evaluated prospectively in two structured interviews. Ever/never use and frequency of use (never, sporadic, persistent) were measured. Main neurodevelopment outcomes were assessed using Childhood Autism Spectrum Test (CAST), Conner's Kiddie Continuous Performance Test (K-CPT) and ADHD-DSM-IV form list. Regression models were adjusted for social determinants and co-morbidities. Results: Over 40% of mothers reported using acetaminophen. Ever-exposed offspring had higher risks of presenting more hyperactivity/impulsivity symptoms [ incidence rate ratio (IRR) = 1.41, 95% confidence interval (CI) 1.01-1.98), K-CPT commission errors (IRR = 1.10,1.03-1.17), and lower detectability scores (coefficient beta = -0.75, -0.13--0.02). CAST scores were increased in ever-exposed males (beta = 0.63, 0.09-1.18). Increased effect sizes of risks by frequency of use were observed for hyperactivity/impulsivity symptoms (IRR = 2.01, 0.95-4.24) in all children, K-CPT commission errors (IRR = 1.32, 1.05-1.66) and detectability (beta = -0.18, -0.36-0.00) in females, and CAST scores inmales (beta = 1.91, 0.44-3.38). Conclusions: Prenatal acetaminophen exposure was associated with a greater number of autism spectrum symptoms in males and showed adverse effects on attention-related outcomes for both genders. These associations seem to be dependent on the frequency of exposure.