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- Li, Lin, 1989-
(author)
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Somatic and occupational outcomes in adult ADHD : epidemiology studies based on real-world data
- 2022
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Doctoral thesis (other academic/artistic)abstract
- Attention-deficit/hyperactivity disorder (ADHD) is one of the most common neurodevelopmental disorders, characterized by inattention or hyperactivity–impulsivity, or both. ADHD is a multifactorial disorder influenced by the complex interplay between genetic and environmental risk factors, but a detailed understanding of the causal status of these factors is lacking. ADHD is associated with many psychiatric disorders, but somatic comorbidity in ADHD has received less attention in the research literature. Pharmacological treatment is effective in reducing the core symptoms of ADHD, but the effects on occupational outcomes remain unclear. The overarching aim of this thesis is to extend previous knowledge on the early risk factors of ADHD, and to increase the awareness and the understanding on somatic and occupational outcomes of ADHD in adults.In Study I, we combined a systematic review and mate-analysis with a population based cohort of 971,501 individuals born between 1992 and 2004 in Sweden. The meta-analysis revealed a positive association between maternal pre-pregnancy overweight/obesity and risk of ADHD in offspring. However, these associations gradually attenuated toward the null when adjusted for measured confounders,unmeasured factors shared by cousins and unmeasured factors shared by siblings. In Study II, by using a Swedish population-based twin study with 17,999 individuals aged 20–47 years, we found both inattention and hyperactivity/impulsivity was associated with higher consumption of high-sugar food and unhealthy dietary habits, although these associations were generally weak. Further, the observed associations was explained by both genetic and non-shared environmental factors.In Study III, we explored the prospective associations between ADHD and a broad range of cardiovascular diseases in 5,389,519 adults from Sweden, and found that ADHD may be a novel and independent risk factor for cardiovascular diseases. In Study IV, based on the longitudinal cohort of 12,875 middle-aged adults with ADHD, we found the use of ADHD medications during the previous two years was associated with a 10% reduction in the risk of long-term unemployment in the following year.Taken together, findings from the thesis highlight the need of future studies with various study designs, to fully understand the aetiology and long-term health outcomes of ADHD across the lifespan.
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| 2. |
- van de Vegte, Yordi, et al.
(author)
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Genetic insights into resting heart rate and its role in cardiovascular disease
- 2023
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In: Nature Communications. - : Springer Nature. - 2041-1723. ; 14:1
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Journal article (peer-reviewed)abstract
- The genetics and clinical consequences of resting heart rate (RHR) remain incompletely understood. Here, the authors discover new genetic variants associated with RHR and find that higher genetically predicted RHR decreases risk of atrial fibrillation and ischemic stroke. Resting heart rate is associated with cardiovascular diseases and mortality in observational and Mendelian randomization studies. The aims of this study are to extend the number of resting heart rate associated genetic variants and to obtain further insights in resting heart rate biology and its clinical consequences. A genome-wide meta-analysis of 100 studies in up to 835,465 individuals reveals 493 independent genetic variants in 352 loci, including 68 genetic variants outside previously identified resting heart rate associated loci. We prioritize 670 genes and in silico annotations point to their enrichment in cardiomyocytes and provide insights in their ECG signature. Two-sample Mendelian randomization analyses indicate that higher genetically predicted resting heart rate increases risk of dilated cardiomyopathy, but decreases risk of developing atrial fibrillation, ischemic stroke, and cardio-embolic stroke. We do not find evidence for a linear or non-linear genetic association between resting heart rate and all-cause mortality in contrast to our previous Mendelian randomization study. Systematic alteration of key differences between the current and previous Mendelian randomization study indicates that the most likely cause of the discrepancy between these studies arises from false positive findings in previous one-sample MR analyses caused by weak-instrument bias at lower P-value thresholds. The results extend our understanding of resting heart rate biology and give additional insights in its role in cardiovascular disease development.
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