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Common psychiatric disorders (CPDs) and depression contribute significantly to the global epidemic of type 2 diabetes (T2D). We postulated a possible pathophysiological mechanism that through Bridge-Symptoms present in depression and CPDs, promotes the establishment of emotional eating, activation of the reward system, onset of overweight and obesity and, ultimately the increased risk of developing T2D. The plausibility of the proposed pathophysiological mechanism is supported by the mechanism of action of drugs such as naltrexone-bupropion currently approved for the treatment of both obesity/overweight with T2D and as separate active pharmaceutical ingredients in drug addiction, but also from initial evidence that is emerging regarding glucagon-like peptide 1 receptor agonists that appear to be effective in the treatment of drug addiction. We hope that our hypothesis may be useful in interpreting the higher prevalence of CPDs and depression in patients with T2D compared with the general population and may help refine the integrated psychiatric-diabetic therapy approach to improve the treatment and or remission of T2D.
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BACKGROUND: Suicide attempts (SA) are a public health concern because of increasing prevalence and clinical implications. Childhood trauma (CT) and emotion dysregulation (ED) have been proposed as predictors of SA, but few data are available in patients with Substance Use Disorder (SUD). OBJECTIVE: Our study aims to investigate the association of sociodemographic/clinical variables, CT typologies, and ED features with SA in SUD patients. PARTICIPANTS AND SETTING: Subjects with SUD were screened in an outpatient setting. The final sample consisted of 226 patients, subdivided according to the presence of lifetime SA (SUD, n = 163 vs. SUD-SA, n = 63). METHODS: Participants were compared for sociodemographic and clinical information. CT and ED were assessed through the Childhood Trauma Questionnaire - Short Form (CTQ-SF) and the Difficulties in Emotion Regulation Scale (DERS), respectively. We performed a mediation analysis to test the effect of CT and ED on SA. RESULTS: Patients with a history of SA (27.9 %) displayed more psychiatric comorbidities (p = 0.002) and hospitalizations (p < 0.001), higher scores at CTQ-SF sexual abuse (p < 0.001) and DERS 'impulse' (p = 0.002), 'goals', 'non-acceptance', 'strategies' (p < 0.001) subscales. The relationship between CTQ-SF sexual abuse and SA was significantly mediated by DERS 'strategies' (p = 0.04; bootstrapped 95 % LLCI-ULCI = 0.004-0.024). CONCLUSIONS: CT and different dimensions of ED were associated with SA in SUD patients. In our sample, the effects of childhood sexual abuse on SA were mediated by limited access to emotion regulation strategies. SUD patients are burdened with higher all-cause mortality, and CT and lifetime SA can worsen clinical outcomes. Clarifying the reciprocal interactions of psychopathological dimensions may help deliver targeted interventions and reduce suicide risk in specific populations.
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Pruebas Psicológicas , Autoinforme , Trastornos Relacionados con Sustancias , Intento de Suicidio , Humanos , Intento de Suicidio/psicología , Encuestas y Cuestionarios , Trastornos Relacionados con Sustancias/epidemiología , EmocionesRESUMEN
Sense of agency (SoA) indicates a person's ability to perceive her/his own motor acts as actually being her/his and, through them, to exert control over the course of external events. Disruptions in SoA may profoundly affect the individual's functioning, as observed in several neuropsychiatric disorders. This is the first article to systematically review studies that investigated intentional binding (IB), a quantitative proxy for SoA measurement, in neurological and psychiatric patients. Eligible were studies of IB involving patients with neurological and/or psychiatric disorders. We included 15 studies involving 692 individuals. Risk of bias was low throughout studies. Abnormally increased action-outcome binding was found in schizophrenia and in patients with Parkinson's disease taking dopaminergic medications or reporting impulsive-compulsive behaviors. A decreased IB effect was observed in Tourette's disorder and functional movement disorders, whereas increased action-outcome binding was found in patients with the cortico-basal syndrome. The extent of IB deviation from healthy control values correlated with the severity of symptoms in several disorders. Inconsistent effects were found for autism spectrum disorders, anorexia nervosa, and borderline personality disorder. Findings pave the way for treatments specifically targeting SoA in neuropsychiatric disorders where IB is altered.
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Trastornos Mentales , Enfermedades del Sistema Nervioso , Percepción , Femenino , Humanos , Conducta Compulsiva/psicología , Conducta Impulsiva , Enfermedad de Parkinson/psicología , Síndrome de Tourette/psicología , Trastornos Mentales/psicología , Enfermedades del Sistema Nervioso/psicologíaRESUMEN
BACKGROUND: Bipolar disorders (BD) in youths are strongly associated with suicidal ideation. Childhood trauma is a prominent environmental stressor associated with both BD diagnosis and suicide. Primary emotional systems are altered in adult BD and may contribute to suicide risk in youths. OBJECTIVE: The aim of this study was to investigate primary emotional systems distribution patterns and childhood trauma in youths' BD with and without suicidal ideation (BD-IS, BD-NIS). PARTICIPANTS AND SETTING: We assessed 289 participants, 103 youths with DSM-5 BD and 186 healthy controls (HCs). METHODS: Primary emotional systems were obtained with Panksepp's Affective Neuroscience Personality Scale (ANPS), and history of childhood trauma using the Childhood Trauma Questionnaire (CTQ). Suicidal ideation was assessed through the Columbia Suicide Scale for the Rating of Suicide Severity (C-SSRS). The associations with suicidal ideation were tested using two different multivariate models. RESULTS: Over 48 % of participants reported lifetime suicidal ideation and differed on clinical variables from BD-NIS. According to the first model (Wilk's Lambda = 0.72, p < 0.0001), BD-IS scored higher on Panksepp's ANGER and lower on PLAY and CARE than BD-NIS. Both BD-SI and BD-NSI scored higher on ANGER and SEEK and lower on PLAY and CARE than HCs. BD-IS reported more emotional abuse than BD-NIS. They also reported more emotional, sexual, and physical abuse, and emotional neglect than HCs. Only ANGER (OR = 1.13, 95 % CI = 1.01-1.26, Wald = 5.72) and CTQ-Emotional abuse (OR = 1.26, 95 % C.I. = 1.04-1.52, Wald = 5.72) independently predicted suicidal ideation. CONCLUSIONS: Findings support the importance of assessing primary emotional systems and childhood trauma, in particular emotional abuse, in youths with BD at risk for suicide.
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Experiencias Adversas de la Infancia , Trastorno Bipolar , Maltrato a los Niños , Suicidio , Adulto , Niño , Humanos , Adolescente , Ideación Suicida , Trastorno Bipolar/diagnóstico , Maltrato a los Niños/psicologíaRESUMEN
BACKGROUND: Different craving typologies (i.e., reward, relief, obsessive) have been identified in alcohol use disorder (AUD) but have been less investigated in specific populations like AUD patients with polysubstance use (PSU). The role of dysfunctional personality traits and reward pathways has been reported in both AUD and PSU. We hypothesized that patients with AUD-PSU might show a prevalent reward craving, alongside specific sociodemographic, clinical, and personality features, and aimed at investigating differences in 423 severe AUD outpatients with and without PSU. METHODS: One hundred fifteen patients (27.1% of the sample, 67% males, 42 ± 11.6 years old) displayed PSU. Sociodemographic, clinical features and psychopathological/personality dimensions were assessed through: Craving Typologies Questionnaire (CTQ); Obsessive-Compulsive Drinking Scale (OCDS); UPPS-P Impulsive Behavior Scale (S-UPPS-P); Difficulties in Emotion Regulation Scale (DERS). A binomial logistic regression explored factors associated with PSU. RESULTS: We found higher CTQ 'reward' scores (p < 0.001) in AUD-PSU patients, and a significant association between reward craving and PSU through logistic regression (OR:1.13; p = 0.005). Earlier AUD onset (p < 0.001), greater rates of binge drinking (p = 0.029), more legal problems (p = 0.015), but no significantly higher S-UPPS-S and DERS scores, were detected in AUD-PSU patients. CONCLUSIONS: Reward craving was associated with increased risk for PSU in severe AUD patients. Given AUD-PSU participants greater severity and detrimental treatment responses imputed to PSU, identifying prevalent craving types among risk factors for PSU in AUD may help to implement therapeutic strategies. Addressing neurobiological and behavioral mechanisms through combined psychotherapies, pharmacological and neuromodulation treatments could support tailored interventions with better long-term outcome.
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Human activities like greenhouse gas emissions, pollution, and deforestation are largely responsible for climate change and biodiversity loss. The climate is a complex system and scientists are striving to predict, prevent, and address the aforementioned issues in order to avoid reaching tipping points. The threat to humankind is not only physical (ie, heat waves, floods, droughts) but also psychological, especially for some groups. Insecurity, danger, chaos, and an unstable system due to climate change have both short- and long-term psychological effects. In this scenario, the need for new psychological categories is emerging, namely, eco-emotions and psychoterratic syndromes which include eco-anxiety, ecological grief, climate worry, and climate trauma. This paper focuses on these new categories, presenting a summary of each one, including definitions, hypotheses, questions, and testological evaluations, as a useful tool to be consulted by researchers and clinicians and to help them in the therapeutic work. Also, this paper endeavors to distinguish between a psychological stress resulting in a positive outcome, such as pro-environmental behavior, compared to a stress that leads to a psychopathology. Prevention and intervention strategies including social and community support are fundamental to help cope with and mitigate the effect of climate change on mental health. In conclusion, the climate crisis has led to an enormous increase in research on climate change and its consequences on mental health. Researchers and clinicians must be prepared to assess this complex phenomenon and provide help to those who cannot cope with anxiety and climatic mourning.
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Cambio Climático , Salud Mental , Humanos , Síndrome , EmocionesRESUMEN
BACKGROUND: Major Depressive Disorder (MDD) and Alcohol Use Disorder (AUD) are major public health concerns because of their high prevalence and clinical and functional severity. MDD and AUD commonly co-occur, but effective therapeutic approaches for comorbidity are still scarce. Available evidence on selective serotonin reuptake inhibitors and tricyclic antidepressants held mixed results, and further pharmacological categories have been less investigated. Trazodone is an approved antidepressant drug for adults and has shown efficacy on symptoms like anxiety and insomnia observed in AUD patients as well. Thus, this study aims to evaluate the effect of extended-release trazodone on clinical and functional features in MDD + AUD subjects. METHODS: One hundred MDD + AUD outpatients were retrospectively evaluated at 1, 3, and 6 months of treatment with extended-release trazodone (150-300 mg/day, flexibly dosed). Improvement in depressive symptoms was the primary outcome measure. Changes in anxiety, sleep, functioning, quality of life, clinical global severity, and alcohol craving were also investigated. RESULTS: Trazodone reduced depressive symptoms (p < 0.001) with 54.5% remission at the endpoint. Similar improvements were observed in all secondary outcomes, including anxiety, sleep alterations, and craving (p < 0.001). Only mild side effects were reported and disappeared over time. CONCLUSION: Extended-release trazodone displayed good antidepressant properties in MDD + AUD patients, ameliorating overall symptomatology, functioning, and quality of life, with a good safety/ tolerability profile. Further, it significantly improved sleep disturbances and craving symptoms, which are associated with drinking relapse and worse outcomes. Therefore, trazodone might represent a promising pharmacological option for MDD + AUD patients.
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Alcoholismo , Trastorno Depresivo Mayor , Trazodona , Adulto , Humanos , Trazodona/uso terapéutico , Trazodona/farmacología , Alcoholismo/complicaciones , Alcoholismo/tratamiento farmacológico , Trastorno Depresivo Mayor/complicaciones , Trastorno Depresivo Mayor/tratamiento farmacológico , Calidad de Vida , Estudios Retrospectivos , Antidepresivos/uso terapéutico , ComorbilidadRESUMEN
There is increasing interest in the involvement of antioxidative systems in protecting from depression. Among these, Nrf2 occupies a central place. We aimed to review the role of Nrf2 in depression. For this reason, we conducted a PubMed search using as search strategy (psychiatr*[ti] OR schizo*[ti] OR psychot*[ti] OR psychos*[ti] OR depress*[ti] OR MDD[ti] OR BD[ti] OR bipolar[ti] OR Anxiety[ti] OR antidepress*[ti] OR panic[ti] OR obsess*[ti] OR compulsio*[ti] OR "mood disord*"[ti] OR phobi*[ti] OR agoraphob*[ti] OR anorex*[ti] OR anorect*[ti] OR bulimi*[ti] OR "eating disorder*"[ti] OR neurodevelopm*[ti] OR retardation[ti] OR autism[ti] OR autistic[ti] OR ASM[ti] OR adhd[ti] OR "attention-deficit"[ti]) AND nrf2, which on the 9th of March produced 208 results of which 89 were eligible for our purposes. Eligible articles were studies reporting data of Nrf2 manipulations or content by any treatment in human patients or animals with any animal model of depression. Most studies were on mice only (N = 58), 20 on rats only, and three on both rats and mice. There were two studies on cell lines (in vitro) and one each on nematodes and fish. Only four studies were conducted in humans, one of which was post mortem. Most studies were conducted on male animals; however, human studies were carried out on both men and women. The results indicate that Nrf2 is lower in depression and that antidepressant methods (drugs or other methods) increase it. Antioxidant systems and plasticity-promoting molecules, such as those in the Nrf2-HO-1, BDNF-TrkB, and cyclic AMP-CREB pathways, could protect from depression, while glycogen synthase kinase-3ß and nuclear factor κB oppose these actions, thus increasing depressive-like behaviours. Since Nrf2 is also endowed with tumorigenic and atherogenic potential, the balance between benefits and harms must be taken into account in designing novel drugs aiming at increasing the intracellular content of Nrf2.
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Pregnancy is a unique experience in women's life, requiring a great ability of adaptation and self-reorganization; vulnerable women may be at increased risk of developing depressive symptoms. This study aimed to examine the incidence of depressive symptomatology during pregnancy and to evaluate the role of affective temperament traits and psychosocial risk factors in predicting them. We recruited 193 pregnant women, collected data regarding sociodemographic, family and personal clinical variables, social support and stressful life events and administered the Mood Disorder Questionnaire (MDQ), the Patient Health Questionnaire-9 (PHQ-9), and the Temperament Evaluation of Memphis, Pisa, Paris and San Diego-Autoquestionnaire (TEMPS-A). In our sample, prevalence of depressive symptomatology was 41.45% and prevalence of depression was 9.85% (6.75% mild and 3.10% moderate depression). We have chosen a cutoff >4 on PHQ-9 to identify mild depressive symptoms which may predict subsequent depression. Statistically significant differences between the two groups were found in the following factors: gestational age, occupation, partner, medical conditions, psychiatric disorders, family psychiatric history, stressful life events, and TEMPS-A mean scores. In our sample mean scores on all affective temperaments but the hyperthymic, were significantly lower in the control group. Only depressive and hyperthymic temperaments were found to be, respectively, risk and protective factors for depressive symptomatology. The current study confirms the high prevalence and complex aetiology of depressive symptomatology during pregnancy and suggests that affective temperament assessment seems to be a useful adjunctive instrument to predict depressive symptomatology during pregnancy and postpartum.
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ABSTRACT: Dysfunctional parenting styles are risk factors for eating disorders (EDs). In this observational study, we examined 57 women with ED, a psychiatric control group (n = 26), and healthy participants (n = 60). Several instruments were administered: Defense Style Questionnaire (DSQ-40) to examine the type of defense mechanism used, Parental Bonding Instrument (PBI) to investigate the perception of the relationship with parents, Eating Disorder Examination Questionnaire and Eating Disorder Inventory-3 to assess the severity of the ED, and Body Shape Questionnaire to investigate the perception of their body shape. In patients with anorexia and bulimia, neurotic factor (p = 0.007) and immature factor (p = 0.002) are associated with perception of relationship with their own parents. In the PBI, maternal care was associated with higher scores in the DSQ-40 in the immature factor (p = 0.012), whereas paternal overprotection was associated with lower scores in the DSQ-40 in the mature factor (p = 0.016). Patients with anorexia and bulimia overutilize more neurotic and primitive defense mechanisms compared with nonclinical subjects, and this use is associated with greater severity of eating symptomatology. This can be related to diversified ego forces, can inform about the nature and severity of disease, and can characterize prognostic and psychotherapeutic value.
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Bulimia Nerviosa , Bulimia , Humanos , Femenino , Bulimia/psicología , Responsabilidad Parental/psicología , Anorexia , Mecanismos de DefensaRESUMEN
PURPOSE OF REVIEW: In this article, we outline an up-to-date overview of the climate change impact on mental health of urban population, conducted by searching the PubMed database for relevant studies published in the past 12-18âmonths, in English. RECENT FINDINGS: Climate change is part of a larger systemic ecological problem in which human demands are exceeding the regenerative capacity of the biosphere. We are witnessing a 'climate chaos', a phase of instability and transformation, which is leading humans into a psychological condition of 'systemic insecurity' and a shared feeling of uncertainty. Currently, one of the places where our species is particularly exposed to climate change are cities, due to build-up in urban infrastructure, rapid and chaotic urbanization, high densities and recent rapid growth, social inequality, and 'heat island effect'.The impact of climate change on cities exposes vulnerable groups to the worse mental health consequences. These groups include the homelessness, slum dwellers for whom the 'neighbourhood effects' are being discussed, climate refugees and migrants, young people, and finally those who assist these people. SUMMARY: In order to realize broader mental health prevention in cities exposed to climate change phenomena, public health approaches are needed. Institutions must avoid reinforcing inequalities among the more vulnerable groups or create new inequalities.
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Cambio Climático , Salud Mental , Humanos , Adolescente , Población Urbana , Ciudades , CalorRESUMEN
Psychosis is a multifactorial condition that typically involves delusions, hallucinations, and disorganized thought, speech or behavior. The observation of an association between infectious epidemics and acute psychosis dates back to the last century. Recently, concerns have been expressed regarding COVID-19 and the risk for the development of new-onset psychosis. This article reviewed the current evidence of a possible link between SARS-CoV-2 and risk of psychosis as an acute or post-infectious manifestation of COVID-19. We here discuss potential neurobiological and environmental factors as well as a number of challenges in ascribing a causal pathogenic relationship between SARS-CoV-2 infection and new-onset psychosis.
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BACKGROUND: Lithium is the standard treatment for bipolar disorders (BD) in adults. There is a dearth of data on its use in the pediatric age. This review aimed to investigate the use of lithium in pediatric bipolar disorder (BD) and other externalizing childhood-related disorders. METHODS: We applied the Preferred Reporting Items for Systematic Reviews and Meta-analyses criteria (PRISMA) to identify randomized controlled trials evaluating the use of lithium in pediatric (BD), conduct disorder (CD), attention deficit hyperactivity disorder, oppositional defiant disorder, and disruptive mood dysregulation disorder. The primary outcome of our study was to evaluate the efficacy of lithium compared to a placebo or other pharmacological agents. The secondary outcomes were acceptability and tolerability. RESULTS: Twelve studies were eligible, 8 on BD and 4 on CD. Overall, 857 patients were treated with lithium. No studies for externalizing disorder diagnoses were identified. Regarding BD patients (n = 673), efficacy results suggested that lithium was superior to placebo in manic/mixed episodes but inferior to antipsychotics. Lithium efficacy ranged from 32% to 82.4%. Results on maintenance need to be expanded. Comorbidity rates with other externalizing disorders were extremely high, up to 98.6%. Results in CD patients (n= 184) suggested the efficacy of lithium, especially for aggressive behaviors. No severe adverse events directly related to lithium were reported in BD and CD; common side effects were similar to adults. CONCLUSION: This systematic review supports the use of lithium in BD and CD as an efficacious and generally well-tolerated treatment in the pediatric age. However, evidence is limited due to the paucity of available data.
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Antipsicóticos , Trastorno Bipolar , Adulto , Niño , Humanos , Trastorno Bipolar/tratamiento farmacológico , Litio/uso terapéutico , Antimaníacos/uso terapéutico , Antimaníacos/farmacología , Ensayos Clínicos Controlados Aleatorios como Asunto , Antipsicóticos/uso terapéuticoRESUMEN
INTRODUCTION: Longitudinal psychopathological predictors of relapse in alcohol use disorder are unclear. METHODS: Relapses, sociodemographic and psychopathological risk factors were assessed in 171 alcohol use disorder outpatients within a 1-year follow up. Impulsivity and alexithymia were evaluated using the Barratt Impulsiveness Scale and the Toronto Alexithymia Scale, respectively. RESULTS: At endpoint, 39% of patients maintained abstinence, 30.9% relapsed at ≤1 month from detoxification (early), 30.1% at >1 month (subsequent). Baseline Barratt Impulsiveness Scale score was predictive of early versus subsequent relapse (odds ratio 1.12, p = 0.005) and versus abstinence (odds ratio 1.17, p < 0.001). Toronto Alexithymia Scale score was a risk factor for subsequent versus early relapse (odds ratio 1.13, p = 0.003) and versus abstinence (odds ratio 1.21, p < 0.001). DISCUSSION AND CONCLUSIONS: Impulsivity predicted relapse within the first 4-weeks; alexithymia showed delayed effects. Time-varying effects of specific relapse factors emphasise the need for preliminary careful assessment and personalised interventions to promote long-term abstinence.
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Alcoholismo , Humanos , Alcoholismo/diagnóstico , Alcoholismo/epidemiología , Estudios Longitudinales , Síntomas Afectivos/diagnóstico , Conducta Impulsiva , Enfermedad Crónica , RecurrenciaRESUMEN
AIMS: The Craving Typology Questionnaire (CTQ) is a psychometric instrument used to assess alcohol craving in normal controls and subjects with alcohol use disorder (AUD). It allows a dimensional self-rating assessment of craving according to a three-pathway psychobiological model of craving distinguishing craving into a reward, relief and obsessive component. The aim of the present study is to evaluate psychometric properties of the CTQ-15, a revised version of CTQ with 15 items. METHODS: The CTQ-15 was firstly administered to two groups of control subjects, one (414 subjects) used for the exploratory factor analysis and the other one (415 subjects) for the confirmatory factor analysis. A three-factor model was assessed and compared to alternative models. RESULTS: The resulting structure was in line with the original scale CTQ. Obsessive craving accounted for 15.20% of the total variance, relief craving for the 13.99% and reward craving for 13.13% of the total variance. The three-factor model (M1) reached good fit indices (CFI = 0.96, TLI = 0.95, RMSEA = 0.06 and SRMR = 0.05) and was significantly better than other alternative models. Reliability showed good internal consistency for each scale, i.e. obsessive craving (α = 0.92), relief craving (α = 0.82) and reward craving (α = 0.81). CONCLUSIONS: The CTQ-15 proved to be reliable and practical for identifying the three dimensions of craving in clinical practice. Craving plays a crucial role in the mechanisms of dependence and relapse; thus, characterizing the craving can be fundamental to a targeted drug therapy.
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Alcoholismo , Humanos , Ansia , Psicometría , Reproducibilidad de los Resultados , Encuestas y Cuestionarios , Análisis FactorialRESUMEN
AIMS: Common Psychiatric Disorders (CPDs) are associated with the development of overweight and obesity, the strongest risk factors for the onset and maintenance of Type 2 Diabetes mellitus (T2D). To the best of our knowledge, this is the first study to assess the prevalence of CPDs in patients with T2D in Italy. METHODS: This is a monocentric cross-sectional study; n = 184 T2D patients were screened for CPDs using the Patient Health Questionnaire (PHQ). Primary outcome was to evaluate the prevalence of CPDs. To assess association between CPDs and risk factors, we have utilized univariable logistic regression models. RESULTS: 64.1% were men, median age was 67 (59-64) and median BMI 27 (25-30) kg/m2. The 42.9% tested positive for one or more mental disorders, 25.6% for depression. Patients with higher BMI (p = 0.04) had an increased likelihood of testing positive to the PHQ. Patients who had implemented lifestyle changes (p < 0.01) and were aware that mental health is linked to body health (p = 0.07) had a reduction in the likelihood of testing positive. CONCLUSIONS: Prevalence of CPDs in T2D patients is higher than in the general population. Since CPDs favor the onset and subsistence of T2D, integrated diabetic-psychiatric therapy is required for improvement or remission of T2D in patients with comorbid CPDs.
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Diabetes Mellitus Tipo 2 , Trastornos Mentales , Masculino , Humanos , Anciano , Femenino , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/epidemiología , Diabetes Mellitus Tipo 2/psicología , Estudios Transversales , Cuestionario de Salud del Paciente , Prevalencia , Trastornos Mentales/complicaciones , Trastornos Mentales/epidemiologíaRESUMEN
The aim of this paper is to describe the direction of the link between stress, depression, increased inflammation and brain-derived neurotrophic factor (BDNF) reduction. We hypothesize that severe stress or prolonged stress can be the driving factor that promote the onset of depression. Both stress and depression, if not resolved over time, activate the production of transcription factors that will switch on pro-inflammatory genes and translate them into cytokines. This cascade fosters systemic chronic inflammation and reduced plasma BDNF levels. Since people with depression have a 60% increased risk of developing type 2 diabetes (T2D) and show high levels of inflammation and low levels of BDNF, we hypothesize possible reasons that might explain why T2D, depression and dementia are often associated in the same patient.
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BACKGROUND: Since the identification of Couvade syndrome in the late 1950s, little attention has been dedicated to the issue of depression in expecting fathers. OBJECTIVE: To quantify the extent of depression in expecting fathers and find out if they match their pregnant partners' depression. METHODS: We conducted a PubMed and ClinicalTrials.gov search using paternal depression and all its variants as terms. We used the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 statement to include eligible studies. RESULTS: We identified a grand total of 1443 articles, of which 204 were eligible. The total number of fathers/expecting fathers involved was 849,913. Longitudinal studies represented more than half of the included studies; more than three-quarters of the studies used the Edinburgh Postnatal Depression Scale (EPDS). The average occurrence of paternal depression was around 5%, which confers the entity some clinical dignity. Depression tends to occur more in expecting women and new mothers than in expecting partners or new fathers, while the co-occurrence in the same couple is quite low. LIMITATIONS: The methodological heterogeneity of the included studies prevents us from meta-analyzing the obtained data. The validity of the instruments used is another issue. CONCLUSIONS: Paternal depression is distinct from maternal depression and occurs at lower rates (about half). The very existence of a paternal depression clinical entity is beyond any doubt. Future research should address methodological heterogeneity.