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Early-life stressful circumstances (i.e. childhood maltreatment) coupled with stressful events later in life increase the likelihood of subsequent depression. However, very few studies have been conducted to examine the specific and cumulative effects of these stressors in the development of depression. There is also a paucity of research that simultaneously considers the role of biological factors combined with psychosocial stressors in the aetiology of depression. Guided by the biopsychosocial model proposed by Engel, the present study aims to examine to what extent the experience of stressors across the lifespan is associated with depression while taking into account the role of genetic predispositions.
Data analysed were from the Social and Psychiatric Epidemiology Catchment Area of the Southwest of Montreal (ZEPSOM), a large-scale, longitudinal community-based cohort study. A total of 1351 participants with complete information on the lifetime diagnoses of depression over a 10-year follow-up period were included in the study. Stressful events across the lifespan were operationalised as specific, cumulative and latent profiles of stressful experiences. Latent profile analysis (LPA) was used to explore the clustering of studied stressors including childhood maltreatment, poor parent–child relationship, and stressful life events. A polygenetic risk score was calculated for each participant to provide information on genetic liability. Multivariate logistic regression was used to examine the association between specific, cumulative and latent profiles of stressors and subsequent depression.
We found that different subtypes of childhood maltreatment, child–parent bonding and stressful life events predicted subsequent depression. Furthermore, a significant association between combined effects of cumulative stressful experiences and depression was found [odds ratio (OR) = 1.20, 95% confidence interval (CI): 1.12–1.28]. Three latent profiles of lifetime stressors were identified in the present study and named as ‘low-level of stress’ (75.1%), ‘moderate-level of stress’ (6.8%) and ‘high-level of stress’ (18.1%). Individuals with a ‘high-level of stress’ had a substantially higher risk of depression (OR = 1.80, 95% CI: 1.08–3.00) than the other two profiles after adjusting for genetic predispositions, socio-demographic characteristics, and health-related factors.
While controlling for genetic predispositions, the present study provides robust evidence to support the independent and cumulative as well as compositional effects of early- and later-on lifetime psychosocial stressors in the subsequent development of depression. Consequently, mental illness prevention and mental health promotion should target the occurrence of stressful events as well as build resilience in people so they can better cope with stress when it inevitably occurs.
To evaluate the dynamic properties of a coupled structure based on the dynamic properties of its substructures, this paper investigates the dynamic substructuring issue from the perspective of response prediction. The main idea is that the connecting forces at the interface of substructures can be expressed by the unknown coupled structural responses, and the responses can be solved rather easily. Not only rigidly coupled structures but also resiliently coupled structures are investigated. In order to further comprehend and visualize the nature of coupling problems, the Neumann series expansion for a matrix describing the relation between the coupled and uncoupled substructures is also introduced in this paper. Compared with existing response prediction methods, the proposed method does not have to measure any forces, which makes it easier to apply than the others. Clearly, the frequency response function matrix of coupled structures can be derived directly based on the response prediction method. Compared with existing frequency response function synthesis methods, it is more straightforward and comprehensible. Through demonstration of two examples, it is concluded that the proposed method can deal with structural coupling problems very well.
Sensory system information is thought to play an important role in drug addiction related responses. However, how somatic sensory information participates in the drug related behaviors is still unclear. Many studies demonstrated that drug addiction represents a pathological usurpation of neural mechanisms of learning and memory that normally relate to the pursuit of rewards. Thus, elucidate the role of somatic sensory in drug related learning and memory is of particular importance to understand the neurobiological mechanisms of drug addiction.
In the present study, we investigated the role of somatosensory system in reward-related associative learning using the conditioned place preference model. Lesions were made in somatosensory cortices either before or after conditioning training. We found that lesion of somatosensory cortices before, rather than after morphine conditioning impaired the acquisition of place preference.
These results demonstrate that somatosensory cortices are necessary for the acquisition but not retention of morphine induced place preference.
To estimate the heritability of personality of children by using a twin design method of quantitative genetic analysis. To analysis the influences of family environment on children personality.
EPQ(Eysenck Personality questionnaire) applying on twins children aged 6-16years to evaluate the children personality.
The general questionnaire, PSDQ Parenting Style and Dimension Questionnaire, FAD-GFS(The General Functioning Scale of the MacMaster Family Activity Device), SLE(stressful life events), FSQ(Family Stresses Questionnaire), FLQ(Family Life Questionnaire), EFQ(Everyday Feelings) were used to collect information about family environment from parents. Zygosity was determined by the DNA picked up from cheek mucosa of twins children. Holzinger analysis was employed to estimate the heritability of mental health.
122 pairs(244 children) of twins (103 twin pairs DNA were picked up successfully), including 54 MZ twin pairs and 49 DZ twin pairs.The heritability of personality:N(Extrovision-Introvision):0.71,P(Psychoticism):0.56,L(Lie):0.43,E(Neuroticism):0.07.
In twins family educated-year of father was significantly correlated with EPQ-E,EPQ-N(r = 0.167,0.145);educated-year of mather was significantly correlated with EPQ-N(r = -0.145);the score of FAD-GFS was significantly correlated with EPQ-E(r = - 0.235);FLQ was significantly correlated with EPQ-n(r = 0.356);the score of father authoritative parenting style was significantly correlated with EPQ-p r = -0.196 ;the score of mather authoritative parenting style was significantly correlated with EPQ-e r = 0.230. the score of family cohesion was significantly correlated with EPQ-n(r = 0.198).
Emotional problems were influenced by genetic factors most followed by inattention-hyperactivity problems and total difficulties environment factors play a main role in conduct problems and prosocial degree while peer problems were only influenced by environment factors. Each aspect of family environment, influence children personality and mental differently.
To introduce some questionnaires related to family environment such as FAD-GFS (The General Functioning Scale of the MacMaster Family Activity Device), SLE (stressful life events), FSQ (Family Stresses Questionnaire), FLQ (Family Life Questionnaire), EFQ (Everyday Feelings Questionnaire) and evaluate their validity and reliability.
Using cross-sectional design. The general questionnaire, FAD-GFS, SLE, FSQ, FLQ, EFQ were used to collect information about family environment from 504 parents of only children FACESII-CV and Index of General Affect were used as scale of criteria related.
The reliability and validity of FAD-GFS, SLE, FSQ, FLQ, EFQ is: Cronbach coefficient were 0.695 to 0.749; re-test reliability were 0.712 to 0.901; The scores of the scale in those questionnaires were correlated with each factor significantly and the coefficient of correlation is more than those between each factor of those scales. The correlation between the scores of FSQ, EFQ and the scores of Index of General Affect was-0.192, 0.539; The correlation between the scores of FAD-GFS, FLQ the score of total and three factor differently and the scores of family cohesion scores (FACESII-CV) was -0.423, 0.237, 0.514, 0.302, 0.210.
FAD-GFS, SLE, FSQ, FLQ, EFQ has good reliability and validity, in line with requirements of psychometric and is useful as a tool to evaluate the family environment.
Many MRI studies have cited major depression, with or without anti-depressive treatment, associated with structural plasticity changing in several brain regions. Few of these studies researched the effect of the anti-depressive treatment, electroconvulsive therapy (ECT), on depression.
To assess the influence of ECT on the brain structure change during the treatment process by utilizing the voxel-based morphometry (VBM) analysis.
To determine whether ECT alter brain structure.
We performed HAMD ratings and MRI scans on 12 depressive patients during ECT, analyzing the data by VBM with SPM8 software's family-wise error correction (FWE).
The researchers found volumes changes in white matter in 37 regions between pre-ECT and post-ECT1, but only one region changing between pre-ECT and post-ECT8. Seven regions changing in grey matter between pre-ECT and post-ECT 1⌧but none regions changing between pre-ECT and post-ECT8.
The density changes in several brain regions after a single ECT stimuli, but return to the original level after completing the eighth ECT. Our finding supports that ECT may play a temporary role in treating major depression but do not permanently alter the structures of brain.
Excessive use of emergency departments (EDs) for the treatment of mental health complaints (MHCs) suggests alternate interventions are required.
To understand attributes of patients who are high frequent users (HFUs) of EDs for the treatment for MHCs.
Suggest realistic changes that would make the health care system more effectively respond to HFUs needs.
Administrative data were used to analyze the use of all three emergency departments in Saskatoon Health Region by patients presenting with primary MHCs in 2012. A chart review of HFUs for the years 2011 to 2013 was also undertaken.
In 2012 approximately 1.2% (3,824) of the Region’s population made the 6,235 visits for a primary MHC. ED visits exhibit a Pareto distribution with most patients (72.8%) making a single visit however < 0.1 % (34) made 10+ visits. HFUs (10+ visits) used EDs in multiple years, over 3 years making an average of 59 ED visits (R=19 to 194). They were generally, young, male, unemployed, transient or homeless with many unmet social and economic needs. They could be categorized into: 1) suffering from severe alcohol abuse/withdrawal or illicit drug use; 2) chronic mood and anxiety disorders; 3) significant personal and social stressors; and 4) a complex combination of psychiatric disease(s) and cognitive impairment.
Action should be taken to identify ‘High Frequency Users’ early in their patient career and develop appropriate interventions taking into account their unique and diverse needs.
To evaluate the validity and reliability of the Chinese version of PSDQ Parenting Styles And Dimensions Questionnaire, PSDQ.
443 parents whose children aged 6 to 16 who lived in Chongqing were selected. 52 of them were retested 6 weeks later in order to assess the retest reliability. Determination of reliability include:internal consistency: to calculate Cronbach coefficient; coefficient of retest reliability: to calculate Person correlation of results of the results in every subscale in twice measurements of 52 parents. Determination of validity: content validity, structural validity, discriminant validity, confirmatory factor analysis.
For each subscale and factor, the values of kappa for inter - rater reliability were 0.625 to 0.884 (p < 0. 05); retest reliability were 0.537 to 0.832 (p < 0. 05) ; The scores of the subscale in the PSDQ were correlated with each factor significantly (coefficient of correlation: 0.732 to 0.951,p < 0. 05) and the coefficient of correlation is more than those between each factor of this subscale(coefficient of correlation: 0.382-0.834,p < 0. 05). Maker of confirmatory factor analysis show met the criteria standard for adequacy of fit. CMIN/df: 2.218-3.745; TLI: 0.808-0.920; RMSEA: 0.052-0.079; MECVI of default model is very close to that of saturated model, most of proliferation index are more than 0.8.
Parenting Styles And Dimensions Questionnaire (PSDQ) has good reliability and validity, in line with requirements of Psychometric is useful as a tool to evaluate the parenting styles from parents.
To analysis the influences of family environment on only-children personality.
Using cross-sectional design only-children aged 6–16years were recruited. using EPQ applying on children to evaluate the children personality. the general questionnaire▮ PSDQ▮FAD-GFS▮SLE▮FSQ▮FLQ▮EFQ were used to collect information about family environment from parents.
In only-child family, standardized regression equation of family environment influence on children personality and mental health:
EPQ-p = 0.087*sle+0.207*father autocratic parenting+0.131*educational of father + 0.110 *family type -0.110*role of discipline-0.080*parental attitude+0.087* family adaptability; EPQ-e=0.105*EFQ -0.088* SLE- 0.101 * family income; EPQ-n = 0.143*SLE-0.090*family cohesion+0.089* family income +0.117 *the attitude of the old-0.138*the role of child experiments of FLQ-0.101* parents shaping the behavior of children of FLQ▮EPQ - l = - 0.136* SLE - 0.093* relationship between parents -0.155*attitude of the old▮
Each aspect of family environment, influence children personality and mental differently.
To estimate the heritability of mental health of children by using a twin design method of quantitative genetic analysis. To analysis the influences of family environment on children mental health.
Using cross-sectional design twins aged 6–16 years were recruited. Using SDQ(Strengths and Difficulties Questionnaire)which was examined by parents (>=11)to evaluate the children mental health. The general questionnaire, FADGFS (General Functioning Scale of the MacMaster Family Activity Device), SLE (stressful life events), FSQ (Family Stresses Questionnaire), FLQ (Family Life Questionnaire), EFQ (Everyday Feelings Questionnaire) were used to collect information about family environment from parents. Zygosity was determined by the DNA picked up from cheek mucosa of twins children. Holzinger analysis was employed to estimate the heritability of mental health.
122 pairs of twins (103 pairs DNA were picked up successfully, including 54 MZ and 49 DZ twin pairs.Heritability of mental health: emot (emotion): 0.86, hyper (hyperactivity): 0.75, total: 0.61, cond (conduct): 0.4, proso (prosocial): 0.12, peer (peer): −0.97. In twins family the score of FAD-GFS was significantly correlated with proso (r = −0.200), the score of FSQ, EFQ was significantly correlated with total (r = 0.206, −0.304), FLQ(include three factor) was significantly correlated with total, proso (r = − 0.472, 0.389; r = −0.277,.247; r = −0.298,0.364), the score of father authoritative parenting style was significantly correlated with total, proso r = −0.244,0.207 the score of mather authoritative parenting style was significantly correlated with total, proso r = −0.437, 0.342. The score of family cohesion was significantly correlated with total proso (r = −0.315,0.432), the score of family adaptability was significantly correlated with total, proso r = −0.359, 0.357.
Emotional problems were influenced by genetic factors most followed by inattention-hyperactivity problems and total difficulties environment factors play a main role in conduct problems and prosocial degree while peer problems were only influenced by environment factors. Each aspect of family environment influence children mental health differently.
The aim of this study was to develop and externally validate a simple-to-use nomogram for predicting the survival of hospitalised human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) patients (hospitalised person living with HIV/AIDS (PLWHAs)). Hospitalised PLWHAs (n = 3724) between January 2012 and December 2014 were enrolled in the training cohort. HIV-infected inpatients (n = 1987) admitted in 2015 were included as the external-validation cohort. The least absolute shrinkage and selection operator method was used to perform data dimension reduction and select the optimal predictors. The nomogram incorporated 11 independent predictors, including occupation, antiretroviral therapy, pneumonia, tuberculosis, Talaromyces marneffei, hypertension, septicemia, anaemia, respiratory failure, hypoproteinemia and electrolyte disturbances. The Likelihood χ2 statistic of the model was 516.30 (P = 0.000). Integrated Brier Score was 0.076 and Brier scores of the nomogram at the 10-day and 20-day time points were 0.046 and 0.071, respectively. The area under the curves for receiver operating characteristic were 0.819 and 0.828, and precision-recall curves were 0.242 and 0.378 at two time points. Calibration plots and decision curve analysis in the two sets showed good performance and a high net benefit of nomogram. In conclusion, the nomogram developed in the current study has relatively high calibration and is clinically useful. It provides a convenient and useful tool for timely clinical decision-making and the risk management of hospitalised PLWHAs.
In this article, Si nanoparticle (NP) films were prepared by pulsed laser ablation (PLA) in the argon atmosphere of 10 Pa at room temperature under different pulse repetition rates from 1 to 40 Hz without the baffle. Different from the conventional PLA method, the substrates were placed below and parallel to the ablated plume axis. The obtained films containing NPs were characterized by scanning electron microscopy and Raman spectrometer. The experimental results under constant laser fluence demonstrate the strong dependence of the mean size and the area number density of NPs on the repetition rate. Specifically, with the increase of pulse repetition rate, the mean size of the NPs in the film first decreases and reaches its minimum at 20 Hz, and then increases after 20 Hz, and decreases again till 40 Hz. The area number density shows the contrary trend versus mean size. The in situ diagnostic results of Langmuir probe denote the ablated Si ion density increases monotonously with the increase of repetition rate, while the temperature is almost constant. Combining with the nucleation probability, the growth/aggregation duration of NPs in the “nucleation region” and the effect of the baffle, the influence of pulse repetition rate on the formation of NPs is addressed. It is found that the repetition rate impacts the growth modes of NPs (i.e., growth and aggregation). 1–20, 20–30, and 30–40 Hz, respectively, correspond to growth-, aggregation-, and growth-controlled rate ranges without the baffle; however, 1–10, 10–20, and 20–40 Hz, respectively, correspond to growth-controlled, aggregation/growth-coexisted, and aggregation-controlled rate ranges with the baffle.
Superparasitism is an adaptive strategy in solitary parasitoids, yet insufficient evidence confirms this in gregarious ones. We here ask whether the gregarious parasitoid Oomyzus sokolowskii is able to discriminate in attack and progeny allocation between parasitized and unparasitized Plutella xylostella larvae, and how the parasitoid allocates brood size and sex to superparasitized hosts due to some circumstances. We found that female parasitoids preferred unparasitized to parasitized host larvae, and allocated a smaller brood with more males in the later than in the former host. Brood size and sex ratio decreased from superparasitized hosts with a 48 h interval since a previous attack compared with one without an interval; they also declined from the host superparasitized by the parasitoid with oviposition experience compared with one without it. Brood size and sex ratio did not differ between the host superparasitized by the same parasitoid as in the first attack and that by a different one. Our findings suggest that O. sokolowskii females may adjust their oviposition decisions on progeny allocation in response to parasitized P. xylostella larvae to maximize their fitness gains from superparasitism.
In the present study, calcium propionate (CaP) was used as feed additive in the diet of calves to investigate their effects on rumen fermentation and the development of rumen epithelium in calves. To elucidate the mechanism in which CaP improves development of calf rumen epithelium via stimulating the messenger RNA (mRNA) expression of G protein-coupled receptors, a total of 54 male Jersey calves (age=7±1 days, BW=23.1±1.2 kg) were randomly divided into three treatment groups: control without CaP supplementation (Con), 5% CaP supplementation (5% CaP) and 10% CaP supplementation (10% CaP). The experiment lasted 160 days and was divided into three feeding stages: Stage 1 (days 0 to 30), Stage 2 (days 31 to 90) and Stage 3 (days 91 to 160). Calcium propionate supplementation percentages were calculated on a dry matter basis. In total, six calves from each group were randomly selected and slaughtered on days 30, 90 and 160 at the conclusion of each experimental feeding stage. Rumen fermentation was improved with increasing concentration of CaP supplementation in calves through the first 30 days (Stage 1). No effects of CaP supplementation were observed on rumen fermentation in calves during Stage 2 (days 31 to 90). Supplementation with 5% CaP increased propionate concentration, but not acetate and butyrate in calves during Stage 3 (days 91 to 160). The rumen papillae length of calves in the 5% CaP supplementation group was greater than that of Con groups in calves after 160 days feeding. The mRNA expression of G protein-coupled receptor 41 (GPR41) and GPR43 supplemented with 5% CaP were greater than the control group and 10% CaP group in feeding 160 days calves. 5% CaP supplementation increased the mRNA expression of cyclin D1, whereas did not increase the mRNA expression of cyclin-dependent kinase 4 compared with the control group in feeding 160-day calves. These results indicate that propionate may act as a signaling molecule to improve rumen epithelium development through stimulating mRNA expression of GPR41 and GPR43.
Suicide-related behaviours are common in schizophrenia and are significantly associated with premature death. The objective of this meta-analysis study was to estimate the pooled prevalence of suicide-related behaviours in schizophrenia patients in China.
The relevant literature was searched systematically via the relevant electronic databases (PubMed, Embase, PsycINFO, Chinese National Knowledge Infrastructure, Wanfang Databases and Chinese Biological Medical Literature Database) from their inception until 14 September 2016. Only original studies that reported the prevalence of suicide-related behaviours including suicidal ideation (SI), suicide plan, suicide attempt (SA) and completed suicide were selected.
Nineteen articles met the inclusion criteria and were analysed. The pooled lifetime prevalence of SI and SA were 25.8% (95% CI 14.7–41.1%) and 14.6% (95% CI 9.1–22.8%), respectively. The 1-month prevalence of SI was 22.0% (95% CI 18.2–26.4%). Subgroup analyses of lifetime SI and SA showed that gender, sample size, survey year, study location and source of patients have no significant mediating effects on the results.
Suicide-related behaviours are common in Chinese schizophrenia patients. Due to the high mortality risk, regular screening and effective suicide prevention programmes are warranted.
Based on the definition of divisibility of Markovian quantum dynamics, we discuss the Markovianity of tensor products, multiplications and some convex combinations of Markovian quantum dynamics. We prove that the tensor product of two Markovian dynamics is also a Markovian dynamics and propose a new witness of non-Markovianity.
To extrapolate the influence of plant cultivars varying in resistance levels to hosts on parasitoid life history traits, we estimated variation in parasitoid developmental and reproductive performances as a function of resistance in soybean cultivars, which were randomly chosen from a line of resistant genotypes. Our study showed that the parasitoid Meteorus pulchricornis varied widely in offspring survival and lifetime fecundity, but varied slightly in development time and adult body size, in response to the soybean cultivars that varied in resistance to the host Spodoptera litura. Furthermore, the variability in survival and lifetime fecundity was different between attacking the 2nd and the 4th instar host larvae, varying more in survival but less in lifetime fecundity when attacking the 4th than 2nd instar larvae. Our study provides further evidence supporting that plant resistance to herbivorous hosts have variable effects on different life history traits of higher trophic level parasitoids.
Literature supports a strong relationship between childhood maltreatment and mental illness but most studies reviewed are cross-sectional and/or use recall to assess maltreatment and are thus prone to temporality and recall bias. Research on the potential prospective impact of maltreatment reduction on the incidence of psychiatric disorders is scarce.
Electronic databases and grey literature from 1990 to 2014 were searched for English-language cohort studies with criteria for depression and/or anxiety and non-recall measurement of childhood maltreatment. Systematic review with meta-analysis synthesized the results. Study quality, heterogeneity, and publication bias were examined. Initial screening of titles and abstracts resulted in 199 papers being reviewed. Eight high-quality articles met eligibility criteria. Population attributable fractions (PAFs) estimated potential preventive impact.
The pooled odds ratio (OR) between any type of maltreatment and depression was 2.03 [95% confidence interval (CI) 1.37–3.01] and 2.70 (95% CI 2.10–3.47) for anxiety. For specific types of maltreatment and depression or anxiety disorders, the ORs were: physical abuse (OR 2.00, 95% CI 1.25–3.19), sexual abuse (OR 2.66, 95% CI 1.88–3.75), and neglect (OR 1.74, 95% CI 1.35–2.23). PAFs suggest that over one-half of global depression and anxiety cases are potentially attributable to self-reported childhood maltreatment. A 10–25% reduction in maltreatment could potentially prevent 31.4–80.3 million depression and anxiety cases worldwide.
This review provides robust evidence of childhood maltreatment increasing the risk for depression and anxiety, and reinforces the need for effective programs and policies to reduce its occurrence.
Little is understood about of the role of coping strategies in psychological well-being (PWB) and distress for the general population and different physical and psychiatric disease groups. A thorough examination of these relationships may provide evidence for the implementation of public mental health promotion and psychiatric disease prevention strategies aimed at improving the use of positive coping approaches or addressing the causes and maintainers of distress. The present study using a structural equation modelling (SEM) approach and nationally representative data on the Canadian population investigates the relationships among PWB, distress and coping strategies and identifies major factors related to PWB for both the general population and diverse-specific disease groups.
Data examined were from the Canadian Community Health Survey of Mental Health and Well-being (CCHS 1.2), a large national survey (n = 36 984). We applied exploratory factor analysis (EFA), confirmatory factor analysis and SEM to build structural relationships among PWB, distress and coping strategies in the general population.
Both SEM measurement and structure models provided a good fit. Distress was positively related to negative coping and negatively related to positive coping. Positive coping indicated a higher level of PWB, whereas negative coping was associated with a lower level of PWB. PWB was negatively related to distress. These same relationships were also found in the population subgroups. For the population with diseases (both physical and psychiatric diseases, except agoraphobia), distress was the more important factor determining subjective PWB than the person's coping strategies, whereas, negative coping had a major impact on distress in the general population. Strengths and limitations were also discussed.
Our findings have practical implications for public psychiatric disease intervention and mental health promotion. As previously noted positive/adaptive coping increased the level of PWB, whereas negative/maladaptive coping was positively related to distress and negatively related to PWB. Distress decreased the level of PWB. Our findings identified major correlates of PWB in both the general population and population subgroups. Our results provide evidence for the differential use of intervention tactics among different target audiences. In order to improve the mental health of the general population public mental health promotion should focus on strategies that reduce negative coping at a population level, whereas clinicians treating individual clients should make the reduction of distress their primary target to maintain or improve patients’ PWB.