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Causal inference

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https://www.readbyqxmd.com/read/28651366/combining-fixed-effects-and-instrumental-variable-approaches-for-estimating-the-effect-of-psychosocial-job-quality-on-mental-health-evidence-from-13-waves-of-a-nationally-representative-cohort-study
#1
Allison Milner, Zoe Aitken, Anne Kavanagh, Anthony D LaMontagne, Frank Pega, Dennis Petrie
Background: Previous studies suggest that poor psychosocial job quality is a risk factor for mental health problems, but they use conventional regression analytic methods that cannot rule out reverse causation, unmeasured time-invariant confounding and reporting bias. Methods: This study combines two quasi-experimental approaches to improve causal inference by better accounting for these biases: (i) linear fixed effects regression analysis and (ii) linear instrumental variable analysis...
June 23, 2017: Journal of Public Health
https://www.readbyqxmd.com/read/28647570/young-children-s-attributions-of-causal-power-to-novel-invisible-entities
#2
Jonathan D Lane, Patrick Shafto
In two studies, we investigated the development of children's reasoning about potent invisible entities. In Study 1, children aged 2.2-5.5years (N=48) were briefly told about a novel invisible substance that could produce a novel outcome-make a novel box turn green. During this introduction, children watched as one container was inverted over a box and the box lit up green, and then another identical container was inverted over the box and the box did not light up. On test trials, the experimenter inserted a spoon in novel (actually empty) containers and inverted the spoon over the box, which turned green in one trial and did not light up in the other trial...
June 22, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/28641760/heeding-the-call-for-less-casual-causal-inferences-the-utility-of-realized-quantitative-causal-effects
#3
Sharon Schwartz, Nicolle M Gatto, Ulka B Campbell
No abstract text is available yet for this article.
June 2017: Annals of Epidemiology
https://www.readbyqxmd.com/read/28641148/non-suicidal-self-injury-and-suicide-attempts-in-a-new-zealand-birth-cohort
#4
Daniel D L Coppersmith, Shyamala Nada-Raja, Annette L Beautrais
BACKGROUND: Non-suicidal self-injury (NSSI) and suicide attempts are related, but distinct behaviors. The primary aim of the current study was to identify factors that distinguish those with different lifetime histories of self-injury. A secondary aim was to test whether lifetime history of self-injury at age 26 predicted current suicide ideation at age 32. METHODS: Participants were 26 year olds from a large birth cohort with a lifetime history of no self-injury (n = 466), a lifetime history of NSSI (n = 191), or a lifetime history of NSSI and a suicide attempt (NSSI+SA; n = 52)...
June 15, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28639206/are-associations-between-sexist-video-games-and-decreased-empathy-toward-women-robust-a-reanalysis-of-gabbiadini-et-al-2016
#5
Christopher J Ferguson, M Brent Donnellan
Gabbiadini, A., Riva, P., Andrighetto, L., Volpato, C., & Bushman, B, (PloS ONE, 2016) provided evidence for a connection between "sexist" video games and decreased empathy toward girls using an experimental paradigm. These claims are based on a moderated mediation model. They reported a three-way interaction between game condition, gender, and avatar identification when predicting masculine ideology in their original study. Masculine ideology was associated, in turn, with decreased empathy. However, there were no main experimental effects for video game condition on empathy...
June 21, 2017: Journal of Youth and Adolescence
https://www.readbyqxmd.com/read/28637861/epidemic-and-endemic-pathogen-dynamics-correspond-to-distinct-host-population-microbiomes-at-a-landscape-scale
#6
Andrea J Jani, Roland A Knapp, Cheryl J Briggs
Infectious diseases have serious impacts on human and wildlife populations, but the effects of a disease can vary, even among individuals or populations of the same host species. Identifying the reasons for this variation is key to understanding disease dynamics and mitigating infectious disease impacts, but disentangling cause and correlation during natural outbreaks is extremely challenging. This study aims to understand associations between symbiotic bacterial communities and an infectious disease, and examines multiple host populations before or after pathogen invasion to infer likely causal links...
June 28, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28637811/bayesian-networks-illustrate-genomic-and-residual-trait-connections-in-maize-zea-mays-l
#7
Katrin Töpner, Guilherme J M Rosa, Daniel Gianola, Chris-Carolin Schön
Relationships among traits were investigated on the genomic and residual levels using novel methodology. This included inference on these relationships via Bayesian networks and an assessment of the networks with structural equation models. The methodology employed three steps. First, a Bayesian multiple-trait Gaussian model was fitted to the data to decompose phenotypic values into their genomic and residual components. Second, genomic and residual network structures among traits were learned from estimates of these two components...
June 21, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28635950/genetically-predicted-high-body-mass-index-was-associated-with-increased-gastric-cancer-risk
#8
Yingying Mao, Caiwang Yan, Qun Lu, Meng Zhu, Fei Yu, Cheng Wang, Juncheng Dai, Hongxia Ma, Zhibin Hu, Hongbing Shen, Guangfu Jin
Epidemiological studies have linked body mass index (BMI) with risk of gastrointestinal cancers. However, for gastric cancer, the relationship is more controversial. In particular, it is unclear whether the observed association is due to confounding or bias inherent in conventional observational studies. To investigate whether BMI is causally associated with gastric cancer risk, we applied Mendelian randomization using individual-level data from 2631 gastric cancer cases and 4373 cancer-free controls. We derived a weighted genetic risk score (wGRS) using 37 BMI-associated genetic variants as an instrumental variable...
June 21, 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28634307/prefrontal-neurons-encode-a-solution-to-the-credit-assignment-problem
#9
Wael F Asaad, Peter M Lauro, János A Perge, Emad N Eskandar
To adapt successfully to our environments, we must use the outcomes of our choices to guide future behavior. Critically, we must be able to correctly assign credit for any particular outcome to the causal features which preceded it. In some cases, the causal features may be immediately evident, whereas in others they may be separated in time or intermingled with irrelevant environmental stimuli, creating a potentially nontrivial credit assignment problem. We examined the neuronal representation of information relevant for credit assignment in the dorsolateral prefrontal cortex (dPFC) of two male rhesus macaques performing a task that elicited key aspects of this problem...
June 20, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28633867/review-of-a-causal-role-of-fructose-containing-sugars-in-myocardial-susceptibility-to-ischemia-reperfusion-injury
#10
REVIEW
Gerald J Maarman, Amy E Mendham, Kim Lamont, Cindy George
In 2012, the World Health Organization Global Status Report on noncommunicable diseases showed that 7.4 million deaths were due to ischemic heart disease. Consequently, cardiovascular disease is a significant health burden, especially when partnered with comorbidities such as obesity, metabolic syndrome, and type 2 diabetes mellitus. Of note, these diseases can all be induced or exacerbated by diet. Carbohydrates, in particular, fructose and glucose, generally form the largest part of the human diet. Accumulating evidence from animal studies suggests that if large amounts of fructose are consumed either in isolation or in combination with glucose (fructose-containing sugars), myocardial susceptibility to ischemia/reperfusion (I/R) injury increases...
June 2017: Nutrition Research
https://www.readbyqxmd.com/read/28629758/implications-of-the-gut-microbiota-in-vulnerability-to-the-social-avoidance-effects-of-chronic-social-defeat-in-male-mice
#11
Joanna Kasia Szyszkowicz, Alex Wong, Hymie Anisman, Zul Merali, Marie-Claude Audet
Appreciable evidence suggests that perturbations within the gut microbiome and the immune system may play a key role in the pathogenesis of depression stemming from earlier stressful experiences. In the present investigation we examined whether microbial changes in cecum contents were associated with social avoidance behaviors, a feature of depression, and pro-inflammatory variations among socially stressed mice. Male C57BL/6 mice experienced social defeat or a control condition once a day for 10 consecutive days...
June 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28628498/earlier-physical-therapy-input-is-associated-with-a-reduced-length-of-hospital-stay-and-reduced-care-needs-on-discharge-in-frail-older-inpatients-an-observational-study
#12
Peter J Hartley, Victoria L Keevil, Ledia Alushi, Rebecca L Charles, Eimear B Conroy, Patricia M Costello, Becki Dixon, Aida M Dolinska-Grzybek, Diana Vajda, Roman Romero-Ortuno
BACKGROUND AND PURPOSE: Pressures on hospital bed occupancy in the English National Health Service have focused attention on enhanced service delivery models and methods by which physical therapists might contribute to effective cost savings, while retaining a patient-centered approach. Earlier access to physical therapy may lead to better outcomes in frail older inpatients, but this has not been well studied in acute National Health Service hospitals. Our aim was to retrospectively study the associations between early physical therapy input and length of hospital stay (LOS), functional outcomes, and care needs on discharge...
June 16, 2017: Journal of Geriatric Physical Therapy
https://www.readbyqxmd.com/read/28627143/-causal-inference-in-epidemiology-a-fruitful-debate
#13
Lorenzo Richiardi, Daniela Zugna, Rino Bellocco, Costanza Pizzi
No abstract text is available yet for this article.
January 2017: Epidemiologia e Prevenzione
https://www.readbyqxmd.com/read/28625322/effect-of-b-vitamins-from-diet-on-hypertension
#14
Ruru Liu, Baibing Mi, Yaling Zhao, Qiang Li, Hong Yan, Shaonong Dang
BACKGROUND: In western populations, a higher level of dietary B vitamins intake has been associated with a lower risk of hypertension. However, data in Chinese is limited, whose B vitamins consumption is low and rates of hypertension are high. AIM OF THE STUDY: To investigate whether the three B vitamins are associated with hypertension in rural Chinese. METHODS: Cross-sectional survey among 2241 rural Chinese aged 18-80 years was conducted in northwestern China in 2010...
February 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/28623726/diagnostic-causal-reasoning-with-verbal-information
#15
Björn Meder, Ralf Mayrhofer
In diagnostic causal reasoning, the goal is to infer the probability of causes from one or multiple observed effects. Typically, studies investigating such tasks provide subjects with precise quantitative information regarding the strength of the relations between causes and effects or sample data from which the relevant quantities can be learned. By contrast, we sought to examine people's inferences when causal information is communicated through qualitative, rather vague verbal expressions (e.g., "X occasionally causes A")...
June 14, 2017: Cognitive Psychology
https://www.readbyqxmd.com/read/28618513/recurrence-measure-of-conditional-dependence-and-applications
#16
Antônio M T Ramos, Alejandro Builes-Jaramillo, Germán Poveda, Bedartha Goswami, Elbert E N Macau, Jürgen Kurths, Norbert Marwan
Identifying causal relations from observational data sets has posed great challenges in data-driven causality inference studies. One of the successful approaches to detect direct coupling in the information theory framework is transfer entropy. However, the core of entropy-based tools lies on the probability estimation of the underlying variables. Here we propose a data-driven approach for causality inference that incorporates recurrence plot features into the framework of information theory. We define it as the recurrence measure of conditional dependence (RMCD), and we present some applications...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28615260/predictors-of-anemia-in-preschool-children-biomarkers-reflecting-inflammation-and-nutritional-determinants-of-anemia-brinda-project
#17
REVIEW
Reina Engle-Stone, Grant J Aaron, Jin Huang, James P Wirth, Sorrel Ml Namaste, Anne M Williams, Janet M Peerson, Fabian Rohner, Ravi Varadhan, O Yaw Addo, Victor Temple, Pura Rayco-Solon, Barbara Macdonald, Parminder S Suchdev
Background: A lack of information on the etiology of anemia has hampered the design and monitoring of anemia-control efforts.Objective: We aimed to evaluate predictors of anemia in preschool children (PSC) (age range: 6-59 mo) by country and infection-burden category.Design: Cross-sectional data from 16 surveys (n = 29,293) from the Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia (BRINDA) project were analyzed separately and pooled by category of infection burden. We assessed relations between anemia (hemoglobin concentration <110 g/L) and severe anemia (hemoglobin concentration <70 g/L) and individual-level (age, anthropometric measures, micronutrient deficiencies, malaria, and inflammation) and household-level predictors; we also examined the proportion of anemia with concomitant iron deficiency (defined as an inflammation-adjusted ferritin concentration <12 μg/L)...
June 14, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28612081/betting-on-transitivity-in-probabilistic-causal-chains
#18
Dennis Hebbelmann, Momme von Sydow
Causal reasoning is crucial to people's decision making in probabilistic environments. It may rely directly on data about covariation between variables (correspondence) or on inferences based on reasonable constraints if larger causal models are constructed based on local relations (coherence). For causal chains an often assumed constraint is transitivity. For probabilistic causal relations, mismatches between such transitive inferences and direct empirical evidence may lead to distortions of empirical evidence...
June 13, 2017: Cognitive Processing
https://www.readbyqxmd.com/read/28608786/new-human-immunodeficiency-virus-diagnosis-independently-associated-with-rectal-gonorrhea-and-chlamydia-in-men-who-have-sex-with-men
#19
Lindley A Barbee, Christine M Khosropour, Julia C Dombrowksi, Matthew R Golden
BACKGROUND: Rectal sexually transmitted infections (STI) have been associated with human immunodeficiency virus (HIV) diagnosis, but inferring a causal association requires disentangling them from receptive anal intercourse (RAI). METHODS: We conducted a stratified case-control study by frequency matching 4 controls to each case within year using clinical data from men who have sex with men (MSM) attending the Seattle STD Clinic 2001 to 2014. Cases were MSM with a new HIV diagnosis and negative HIV test at 12 months or less...
July 2017: Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/28606350/genetic-analysis-reveals-efficient-sexual-spore-dispersal-at-a-fine-spatial-scale-in-armillaria-ostoyae-the-causal-agent-of-root-rot-disease-in-conifers
#20
Cyril Dutech, Frédéric Labbé, Xavier Capdevielle, Brigitte Lung-Escarmant
Armillaria ostoyae (sometimes named Armillaria solidipes) is a fungal species causing root diseases in numerous coniferous forests of the northern hemisphere. The importance of sexual spores for the establishment of new disease centres remains unclear, particularly in the large maritime pine plantations of southwestern France. An analysis of the genetic diversity of a local fungal population distributed over 500 ha in this French forest showed genetic recombination between genotypes to be frequent, consistent with regular sexual reproduction within the population...
June 2017: Fungal Biology
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