Sequence variants associated with BMI affect disease risk through BMI itself.

Mendelian Randomization studies indicate that BMI contributes to various diseases, but it's unclear if this is entirely mediated by BMI itself. This study examines whether disease risk from BMI-associated sequence variants is mediated through BMI or other mechanisms, using data from Iceland and the UK Biobank. The associations of BMI genetic risk score with diseases like fatty liver disease, knee replacement, and glucose intolerance were fully attenuated when conditioned on BMI, and largely for type 2 diabetes, heart failure, myocardial infarction, atrial fibrillation, and hip replacement.

Preoperative optimization of modifiable risk factors is associated with decreased superficial surgical site infections after total joint arthroplasty: a prospective case-control study.

Background And Purpose: The aim of our study was to investigate change in modifiable risk factors following preoperative optimization and whether risk of superficial surgical site infection (SSI) after total joint arthroplasty (TJA) could be reduced.

Methods: This is a prospective study of implementation of a preoperative optimization pathway for patients waiting for primary TJA. Information regarding the intervention arm was collected from January 2019 to January 2021, first at decision for operation and then at preoperative assessment 1 week prior to operation.

[Psychedelics and treatment of mental disorders: A survey of attitudes and knowledge among psychiatrists, general practitioners and psychologists in Iceland].

Introduction: Interest in the use of psychedelics has increased following reports of their possible therapeutic potential. However, little is known about the knowledge of and attitudes towards the substances among health care professional who provide treatment for mental disorders in Iceland. An online survey was therefore conducted among members of the Icelandic associations of psychiatrists, general practitioners and psychologists.

[Epidemiology of polypharmacy in primary healthcare in the Reykjavik metropolitan area 2010-2019].

Introduction: Taking medicines can induce risks leading to negative health issues that can grow in accordance with the number of medicines used. Many studies on the prevalence of polypharmacy have been carried out in other countries, but such studies are lacking in Iceland. The aim of this study was to analyse the prevalence of polypharmacy in primary care in the Reykjavik metropolitan area.

Physical and cognitive impact following SARS-CoV-2 infection in a large population-based case-control study.

Background: Persistent symptoms are common after SARS-CoV-2 infection but correlation with objective measures is unclear.

Methods: We invited all 3098 adults who tested SARS-CoV-2 positive in Iceland before October 2020 to the deCODE Health Study. We compared multiple symptoms and physical measures between 1706 Icelanders with confirmed prior infection (cases) who participated, and 619 contemporary and 13,779 historical controls.

Prevalence of modifiable risk factors in primary elective arthroplasty and their association with infections.

Background And Purpose: The aim of this study was to identify the prevalence of modifiable risk factors of surgical site infections (SSI) in patients undergoing primary elective total joint arthroplasty (TJA) receiving conventional preoperative preparation, and to explore their association with infectious outcomes.

Patients And Methods: Information regarding modifiable risk factors (anemia, diabetes, obesity, nutritional status, smoking, physical activity) was prospectively gathered in patients undergoing primary TJA of hip or knee in 2018-2020 at a single institution with 6 weeks' follow-up time.

Results: 738 patients (median age 68 years [IQR 61-73], women 57%) underwent TJA (knee 64%, hip 36%).

[Migraine prevalence, migraine incidence and migraine drug prescriptions in primary care in the capital region of Iceland].

Introduction: The study aim was to describe migraine incidence over the ten-year periods, 2000-2009 and 2010-2019, in individuals aged 10-79 years in primary healthcare centre (PHCC) Sólvangur and Fjörður, Hafnarfirði. Another aim was to estimate migraine prevalence in primary care clinics in the capital area of Iceland over the period 2010-2019 and describe prescriptions for migraine specific drugs and other drugs used for migraine.

Material And Methods: This is a retrospective study based on data from medical records from the primary care clinics of the capital region of Iceland.

Has the COVID-19 Pandemic Led to Changes in the Tasks of the Primary Care Workforce? An International Survey among General Practices in 38 Countries (PRICOV-19).

The COVID-19 pandemic has had a large and varying impact on primary care. This paper studies changes in the tasks of general practitioners (GPs) and associated staff during the COVID-19 pandemic. Data from the PRICOV-19 study of 5093 GPs in 38 countries were used.

Multiomics study of nonalcoholic fatty liver disease.

Nonalcoholic fatty liver (NAFL) and its sequelae are growing health problems. We performed a genome-wide association study of NAFL, cirrhosis and hepatocellular carcinoma, and integrated the findings with expression and proteomic data. For NAFL, we utilized 9,491 clinical cases and proton density fat fraction extracted from 36,116 liver magnetic resonance images.

Co-prescribing of opioids and benzodiazepines/Z-drugs associated with all-cause mortality-A population-based longitudinal study in primary care with weak opioids most commonly prescribed.

The risk of mortality associated with the co-prescribing of benzodiazepines and opioids has been explored in a number of papers mainly focusing on strong opioids. The mortality risk associated with the use of weak opioids has not been dealt with to a similar extent. To assess the mortality risk in primary care patients with consistent 3-year co-prescribing of benzodiazepine/Z-drugs (benzodiazepine receptor modulators) and mainly weak opioids (codeine, tramadol).

[Hypertension Management in Primary Care in the Capital Area of Iceland].

Introduction: High blood pressure (HT) is one of the main risk factors for cardiovascular diseases which in 2010 caused one third of all mortality in the world. Untreated, HT can cause stroke, myocardial infarction, heart failure, dementia, kidney failure, atherosclerosis and eye diseases. The main aim of this study was to find out how HT is treated in primary care in the capital area of Iceland.

[Changes in prescriptions on opioids in primary health care during the years 2008-2017].

Introduction: In recent decades there has been a notable increase in the prescription of opioids in western countries. With this rise in use of opioids the risk of side effects, opioid abuse and deaths linked to opioids have become more apparent. The increase in opioid prescription may partly stem from a change in attitude in relation to pain management.

Artificial intelligence in the GPs office: a retrospective study on diagnostic accuracy.

Objective: Machine learning (ML) is expected to play an increasing role within primary health care (PHC) in coming years. No peer-reviewed studies exist that evaluate the diagnostic accuracy of ML models compared to general practitioners (GPs). The aim of this study was to evaluate the diagnostic accuracy of an ML classifier on primary headache diagnoses in PHC, compare its performance to GPs, and examine the most impactful signs and symptoms when making a prediction.

Genetic variants associated with platelet count are predictive of human disease and physiological markers.

Platelets play an important role in hemostasis and other aspects of vascular biology. We conducted a meta-analysis of platelet count GWAS using data on 536,974 Europeans and identified 577 independent associations. To search for mechanisms through which these variants affect platelets, we applied cis-expression quantitative trait locus, DEPICT and IPA analyses and assessed genetic sharing between platelet count and various traits using polygenic risk scoring.

Large-Scale Screening for Monogenic and Clinically Defined Familial Hypercholesterolemia in Iceland.

Objective: Familial hypercholesterolemia (FH) is traditionally defined as a monogenic disease characterized by severely elevated LDL-C (low-density lipoprotein cholesterol) levels. In practice, FH is commonly a clinical diagnosis without confirmation of a causative mutation. In this study, we sought to characterize and compare monogenic and clinically defined FH in a large sample of Icelanders.

Distinction between the effects of parental and fetal genomes on fetal growth.

Birth weight is a common measure of fetal growth that is associated with a range of health outcomes. It is directly affected by the fetal genome and indirectly by the maternal genome. We performed genome-wide association studies on birth weight in the genomes of the child and parents and further analyzed birth length and ponderal index, yielding a total of 243 fetal growth variants.

How primary healthcare in Iceland swiftly changed its strategy in response to the COVID-19 pandemic.

Objective: To describe how the primary healthcare (PHC) in Iceland changed its strategy to handle the COVID-19 pandemic.

Design: Descriptive observational study.

Setting: Reykjavik, the capital of Iceland.

Discovery of rare variants associated with blood pressure regulation through meta-analysis of 1.3 million individuals.

Genetic studies of blood pressure (BP) to date have mainly analyzed common variants (minor allele frequency > 0.05). In a meta-analysis of up to ~1.

Prescriptions of antibiotics in out-of-hours primary care setting in Reykjavik capital area.

Objective: To describe antibiotic prescriptions in out-of-hour (OOH) service in primary care setting in Iceland and to study the indications for prescriptions.

Design: A population based retrospective study, using electronic data from the OOH registration system.

Setting: OOH primary care setting in Reykjavik capital area in Iceland.

[Vitamin D status of Icelandic children and youngsters: Longitudinal study].

Objective: Vitamin D plays a key role for children's growth and physical developement, not only by promoting bone health but also by its influence on extraskeletal systems. The Icelandic Directorate of Health recommends a vitamin D concentration in blood of at least 50 nmol/l. The object of this study was to evaluate the vitamin D status of Icelandic children and youngsters at four different ages, and furthermore to evaluate changes in vitamin D concentrations over time and connection to parathyroid hormone status (S-PTH).

Association between prescription of hypnotics/anxiolytics and mortality in multimorbid and non-multimorbid patients: a longitudinal cohort study in primary care.

Objectives: To assess the risk of mortality in primary care patients, multimorbid (≥2 chronic conditions) or not, prescribed hypnotics/anxiolytics.

Design: A longitudinal cohort study SETTING: Primary healthcare in the Reykjavik area.

Participants: 114 084 individuals (aged 10-79 years, average 38.