A twin study of depression and migraine: evidence for a shared genetic vulnerability

Migraine heritability and beyond: A scoping review of twin studies

OBJECTIVE

This scoping review aimed to summarize current knowledge from twin studies on migraine. Migraine heritability, genetic correlations with migraine comorbid disorders, and the use of discordant twin pairs in migraine research are described. Further, the review considers the unused potential of twin studies in migraine research and reflects on future directions.

BACKGROUND

Twin studies can be used to understand how heritable and environmental factors influence human traits and disorders. The classical twin design compares the resemblance of a trait in monozygotic twins to that in dizygotic twins. The classical twin design can be extended to estimate the genetic correlation between disorders, model causality, and describe differences within discordant twin pairs.

METHODS

Studies focusing on migraine and using a twin study design were included. The search was performed on the PubMed-MEDLINE database using the search terms "migraine" AND "twin" OR "twins." It was done in May 2023, rerun in November 2023, and managed with the Covidence software.

RESULTS

The search identified 52 twin studies on migraine. In 24 papers, the heritability of migraine was estimated with a classical twin design. Heritability estimates ranged from 0.36 to 0.48 for studies with adults, both men and women, and unspecified migraine. Migraine heritability was predominantly estimated with twin cohorts of North European ancestry, and only two studies examined migraine subtypes. A multilevel classical twin design was used in 11 studies to examine the co-occurrence between migraine and comorbid disorders. The differences within migraine discordant twin pairs were examined in nine studies.

CONCLUSION

The heritability of migraine was estimated with a classical twin design in twin cohorts from seven different countries, with remarkably similar results across studies. Future studies should include migraine subtypes and twin cohorts of non-North European ancestry to better reflect the global population. Beyond heritability estimations, the twin method is a valuable tool for understanding causality and describing differences within discordant twin pairs. Despite more than 80 years of twin studies in migraine research, the twin design has a large unused potential to advance our understanding of migraine.

Cognitive symptoms in veterans with migraine or traumatic brain injury: A Million Veteran Program study

OBJECTIVE

To examine the spectrum and severity of cognitive symptoms in veterans with migraine, traumatic brain injury (TBI), or both; and to evaluate the extent to which psychiatric conditions contribute to the relationship of migraine and TBI with cognitive symptoms.

BACKGROUND

Migraine contributes significantly to global disability, with veterans facing additional burdens due to high comorbidity of TBI and psychiatric conditions. Understanding the intersection of these conditions is crucial for improving veterans' health-care outcomes.

METHODS

This observational study used self-reported data from 338,217 veterans enrolled in the Million Veteran Program (MVP) to assess cognitive symptoms using the Medical Outcomes Study Cognitive Functioning Scale Revised (MOS-Cog-R) and psychiatric conditions in veterans with migraine only, TBI only, both, or neither.

RESULTS

Of the participants, 30,080/338,217 (8.9%) veterans reported migraine, 31,906/338,217 (9.4%) reported TBI, and 7828/338,217 (2.3%) reported both migraine and TBI. Veterans with only migraine or only TBI reported similar levels of cognitive symptoms (M = 74.19, standard deviation [SD] = 25.18; M = 73.87, SD = 24.98, respectively), which were substantially higher than veterans without these conditions (M = 62.52, SD = 27.90). Veterans with both conditions reported the most cognitive symptoms (M = 83.01, SD = 22.13) and psychiatric conditions (depression = 5041/7828 [64.4%], anxiety = 3735/7828 [47.7%], post-traumatic stress disorder = 4243/7828 [54.2%]). The association of migraine and TBI with cognitive symptoms persisted beyond the influence of psychiatric conditions (B = -2.20, standard error = -0.36, p < 0.001).

CONCLUSION

Veterans with migraine reported cognitive challenges analogous to veterans with TBI, indicating a need for careful attention to cognitive symptoms in veterans with migraine. Further, the associations of migraine and TBI with cognitive symptoms in veterans were not explained by psychiatric conditions. These findings encourage future research to elucidate the association between self-reported and objective cognitive symptoms and to identify factors, including environmental exposure and genetic influences, contributing to cognitive impairment to optimize the assessment and treatment of veterans with migraine.

Identification of genetic susceptibility for Chinese migraine with depression using machine learning

Background

Migraine is a common primary headache that has a significant impact on patients' quality of life. The co-occurrence of migraine and depression is frequent, resulting in more complex symptoms and a poorer prognosis. The evidence suggests that depression and migraine comorbidity share a polygenic genetic background.

Objective

The aim of this study is to identify related genetic variants that contribute to genetic susceptibility to migraine with and without depression in a Chinese cohort.

Methods

In this case-control study, 263 individuals with migraines and 223 race-matched controls were included. Eight genetic polymorphism loci selected from the GWAS were genotyped using Sequenom's MALDI-TOF iPLEX platform.

Results

In univariate analysis, ANKDD1B rs904743 showed significant differences in genotype and allele distribution between migraineurs and controls. Furthermore, a machine learning approach was used to perform multivariate analysis. The results of the Random Forest algorithm indicated that ANKDD1B rs904743 was a significant risk factor for migraine susceptibility in China. Additionally, subgroup analysis by the Boruta algorithm showed a significant association between this SNP and migraine comorbid depression. Migraineurs with depression have been observed to have worse scores on the Beck Anxiety Inventory (BAI) and the Migraine Disability Assessment Scale (MIDAS).

Conclusion

The study indicates that there is an association between ANKDD1B rs904743 and susceptibility to migraine with and without depression in Chinese patients.

Psychiatric Comorbidities in Neurologic Hospitalizations in Portugal: A Nationwide Retrospective Observational Study

INTRODUCTION

Psychiatric comorbidities have a significant impact on patients' quality of life and often go undetected in neurologic practice. The aim of this study was to describe and characterize psychiatric comorbidities among patients hospitalized due to a neurologic disorder in mainland Portugal.

METHODS

A retrospective observational study was performed by analyzing hospitalization with a primary diagnosis of neurologic disorder defined as categories 76, 77, 79 - 85, 95, 109 of the Clinical Classification Software for International Classification of Diseases, Ninth Revision, Clinical Modification, occurring between 2008 and 2015 in adult patients (≥ 18 years of age). Psychiatric comorbidities were determined as the presence of a secondary diagnosis belonging to the Clinical Classification Software categories 650 to 670.

RESULTS

A total of 294 806 hospitalization episodes with a primary diagnosis of a neurologic disorder were recorded in adult patients between 2008 - 2015 in Portuguese public hospitals. Approximately 26.9% (n = 79 442) of the episodes had a recorded psychiatric comorbidity (22.1%; 32.2%, female versus male hospitalizations). Patients with registered psychiatric comorbidities were younger (66.2 ± 16.2 vs 68.6 ± 17.2 with no psychiatric comorbidities, p < 0.001), presented lower all-cause in-hospital mortality rates, and significantly longer mean hospital stays. 'Delirium, dementia, amnestic and other cognitive disorders' were recorded in 7.4% (n = 21 965) of the hospitalizations, followed by alcohol-related disorders in 6.5% (n = 19 302) and mood disorders in 6.1% (n = 18 079). Epilepsy/seizures were the neurologic disorders with the highest proportion of recorded psychiatric comorbidities (39.9%).

CONCLUSION

Psychiatric comorbidities were recorded in more than a quarter of the hospitalizations with a primary diagnosis of a Neurologic disorder. Psychiatric comorbidities varied among neurological disorders and were associated with different demographic and clinical features.

Depression and treatment with anti-calcitonin gene related peptide (CGRP) (ligand or receptor) antibodies for migraine

BACKGROUND AND PURPOSE

The aim was to evaluate the effect of anti-calcitonin gene related peptide (CGRP) (ligand or receptor) antibodies on depressive symptoms in subjects with migraine and to determine whether depressive symptoms predict treatment response.

METHODS

Patients with migraine treated with erenumab and fremanezumab at the Leiden Headache Centre completed daily E-headache diaries. A control group was included. Depressive symptoms were assessed using the Hospital Anxiety and Depression Scale (HADS) and the Center for Epidemiological Studies Depression Scale (CES-D) questionnaires at baseline (T0) and after 3 months (T1). First, the effect of treatment on the reduction in HADS-D and CES-D scores was assessed, with reduction in depression scores as the dependent variable and reduction in monthly migraine days (MMD) and treatment with anti-CGRP medication as independent variables. Second, depression as a predictor of treatment response was investigated, using the absolute reduction in MMD as a dependent variable and age, gender, MMD, active depression, impact, stress and locus of control scores as independent variables.

RESULTS

In total, n = 108 patients were treated with erenumab, n = 90 with fremanezumab and n = 68 were without active treatment. Treatment with anti-CGRP medication was positively associated with a reduction in the HADS-D (β = 1.65, p = 0.01) compared to control, independent of MMD reduction. However, the same effect was not found for the CES-D (β = 2.15, p = 0.21). Active depression predicted poorer response to erenumab (p = 0.02) but not to fremanezumab (p = 0.09).

CONCLUSION

Anti-CGRP (ligand or receptor) monoclonals lead to improvement of depressive symptoms in individuals with migraine, independent of migraine reduction. Depression may predict treatment response to erenumab but not to fremanezumab.

Understanding the Biological Relationship between Migraine and Depression

Migraine is a highly prevalent neurological disorder. Among the risk factors identified, psychiatric comorbidities, such as depression, seem to play an important role in its onset and clinical course. Patients with migraine are 2.5 times more likely to develop a depressive disorder; this risk becomes even higher in patients suffering from chronic migraine or migraine with aura. This relationship is bidirectional, since depression also predicts an earlier/worse onset of migraine, increasing the risk of migraine chronicity and, consequently, requiring a higher healthcare expenditure compared to migraine alone. All these data suggest that migraine and depression may share overlapping biological mechanisms. Herein, this review explores this topic in further detail: firstly, by introducing the common epidemiological and risk factors for this comorbidity; secondly, by focusing on providing the cumulative evidence of common biological aspects, with a particular emphasis on the serotoninergic system, neuropeptides such as calcitonin-gene-related peptide (CGRP), pituitary adenylate cyclase-activating polypeptide (PACAP), substance P, neuropeptide Y and orexins, sexual hormones, and the immune system; lastly, by remarking on the future challenges required to elucidate the etiopathological mechanisms of migraine and depression and providing updated information regarding new key targets for the pharmacological treatment of these clinical entities.

Towards precision medicine in migraine: Recent therapeutic advances and potential biomarkers to understand heterogeneity and treatment response

After 35 years since the introduction of the International Classification of Headache Disorders (ICHD), we are living in the era of the second great revolution in migraine therapies. First, discoveries of triptans provided a breakthrough in acute migraine treatment utilizing bench-to-bedside research results on the role of serotonin in migraine. Next, the discovery of the role of neuropeptides, more specifically calcitonin gene-related peptide (CGRP) in migraine attack led to the development of anti-CGRP therapies that are effective both in acute and preventive treatment, and are also able to reduce migraine-related burden. Here, we reviewed the most recent clinical studies and real-world data on available migraine-specific medications, including triptans, ditants, gepants and anti-CGRP monoclonal antibodies. Novel drug targets, such as PACAP and amylins were also discussed. To address the main challenges of migraine therapy, the high heterogeneity of people with migraine, the prevalent presence of various comorbid disorders, and the insufficient medical care of migraine patients were covered. Promising novel approaches from the fields of omics, blood and saliva biomarker, imaging and provocation studies might bring solutions for these challenges with the potential to identify further drug targets, distinguish more homogeneous patient subgroups, contribute to more optimal drug selection strategies, and detect biomarkers in association with headache features or predicting treatment efficacy. In the future, the combined analysis of data of different biomarker modalities with machine learning algorithms may serve precision medicine in migraine treatment.

Parental resources and heritability as factors shaping children's health. An analysis of twins' self-rated health using TwinLife

We assess the relative and joint contributions of genetic and environmental factors on health during childhood and assume that parental resources are part of the environmental factors shaping children's health. We discuss theoretical background and empirical evidence concerning the effects of parental resources and heritability on children's health. Based on these findings we formulate six hypotheses guiding our empirical analysis, using data from TwinLife, a nationally representative sample of same sex twin pairs in Germany. We analyze self-rated health of 1,584 twin pairs aged 4-18. We did find strong support for the idea that parental resources influence children's health: household income and fathers' education consistently show positive effects. In contrast to our expectation, we did not find that genetic factors influence the health of well-off children less than the health of children living in families with lower SES. We also did not find that the genetic influence on health increases during childhood and adolescence. On the contrary our results indicate that the role played by genetic factors diminishes whereas environmental factors gain importance for health of children while growing up. This finding is good news for those interested in improving health chances of children from lower SES backgrounds because it demonstrates the malleability of children's health.

Migraine and treatment-resistant depression

Migraine and major depressive disorders (MDD) or treatment resistant depression (TRD) represent a significant global burden and are often comorbid, further complicating diagnosis and treatment. Epidemiological studies have demonstrated a bidirectional relationship between migraine and MDD/TRD, with patients suffering from one disorder exhibiting a heightened risk of developing the other. This association is believed to result from shared genetic factors, neurotransmitter dysregulation, inflammation, hormonal alteration, and other conditions comorbid with both disorders. Emerging evidence suggests that therapeutics targeting common pathways in both disorders may be beneficial for comorbid patients. Novel therapeutics for migraine or MDD/TRD, such as calcitonin gene-related peptide (CGRP)-targeting therapy, onabotulinumtoxinA, ketamine/esketamine, vagus nerve stimulation or transcranial magnetic stimulation, may be helpful in selected patients with comorbid migraine-MDD/TRD. Nevertheless, continued efforts are needed to improve early detection and intervention, to better understand the complex interplay between genetic, environmental, and psychosocial factors contributing to this comorbidity, to identify novel therapeutic targets, and ultimately, to alleviate the disease burden caused by this comorbidity.

Tension-Type Headache in Children and Adolescents

In pediatric neurology, tension-type headache (TTH) represents a very common type of primary headache during the pediatric age. Despite the high prevalence of TTH, this diagnosis is often underestimated in childhood, with relevant difficulties in the differential diagnosis of TTH from secondary and primary headache manifestations. Even among primary headaches, a clinical overlap is not so infrequent in children: migraine attacks could present tension headache-like features while tension-type headaches may display migraine-like symptoms as well. Several variables play a role in the complex trajectory of headache evolution, such as hormonal changes during adolescence, triggers and genetic and epigenetic factors. The trajectories and outcomes of juvenile migraine and TTH, as well as the transition of one form to the other, have been investigated in several long-term prospective studies. Thus, the aim of this paper is to review the current literature on the differential diagnosis workout of TTH in pediatrics, the possible outcomes during the developmental age and the appropriate therapeutic strategies. Indeed, TTH represents a challenging diagnostic entity in pediatrics, both from a clinical and a therapeutic point of view, in which early diagnosis and appropriate treatment are recommended.

Depression, anxiety and stress in Saudi migraine patients using DASS-21: local population-based cross-sectional survey

Background: Psychiatric comorbidity is common among migraineurs, such as anxiety and depression. This type of comorbidity contributed to migraine chronicity, management efficacy, and increasing the risk for other comorbidities. This study designed to estimate the prevalence of depression, anxiety, and stress (DAS) symptoms among Saudi migraine patients using the validated instrument (DASS-21) and considering socio-demographic factors and individual differences that affect migraine progression and prognosis.Design/methods: Cross-sectional, self-administered, web-based-questionnaire distributed among Saudi Arabia general population. Only migraine patients with clinical diagnosis allowed to complete the survey.Results: A total of 247 migraine patients participated and they are predominantly females, with ages between 16 and 45 years, Saudi nationals, married, non-smokers but do not exercise regularly. About 73.3% met the abnormal score in anxiety on DASS-21, as well as 70.9% in depression and 72.3% in stress. Four statistically significant correlations with DAS were identified. Migraine patients who are smoking have a higher prevalence of depression and stress (p < 0.05). Those who do not exercise regularly have a higher prevalence only for depression (p = 0.03). A higher prevalence of all emotional states was found in patients with more than one co-morbidity and patients with a clinical diagnosis of depression and anxiety disorders (p < 0.02). The sensitivity of DASS-21 for depression and anxiety are 96.9% and 93.3%, respectively.Conclusions: Both smoking cessation and exercise to prevent migraine attacks deserve a clinical trial. A holistic approach is needed to decrease psychiatry-related disability and promote management outcomes in migraineurs. Using DASS-21 for migraine patients as a routine screening instrument is valuable to prevent psychiatric comorbidity.

Migraine, Migraine Disability, Trauma, and Discrimination in Sexual and Gender Minority Individuals

BACKGROUND AND OBJECTIVES

This study sought to describe migrainous headache frequency and severity and to examine the relationship between trauma, discrimination, and migraine-associated disability in a sample of sexual and/or gender minority (SGM) adults.

METHODS

We performed a cross-sectional study of SGM people in The Population Research in Identity and Disparities for Equality Study from August to October 2018. The primary exposure was any trauma or discrimination, regardless of attribution. The primary outcome was moderate-severe migraine disability, as defined by a Migraine Disability Assessment (MIDAS) Questionnaire score of ≥11. We performed descriptive analysis comparing respondents with any migrainous headache with those without. Multivariable logistic regression examined the association between trauma/discrimination and migraine disability, controlling first for sociodemographic and clinical factors and then for psychiatric comorbidities.

RESULTS

Of the 3,325 total respondents, 1,126 (33.9%) screened positive for migrainous headache by ID-Migraine criteria. Most people with migraine self-reported moderate (n = 768, 68.2%) or severe (n = 253, 22.5%) intensity. The median MIDAS score was 11 (interquartile range 5-25). Most respondents with migraine (n = 1,055, 93.7%) reported a history of trauma or discrimination. In unadjusted analysis, exposure to both trauma and discrimination was associated with higher odds of moderate-severe disability (OR 1.76, 95% CI 1.34-2.32). After adjustment for self-reported psychiatric comorbidities of anxiety, depression, and posttraumatic stress disorder, this association lost statistical significance.

DISCUSSION

Migrainous headache is common among our sample of SGM adults, and prior experiences with trauma and discrimination are associated with increased migraine disability. Our findings suggest that psychiatric comorbidities play a significant role in this relationship, identifying a potentially modifiable risk factor for disability in SGM people with migraine.

Migraine: interactions between brain's trait and state

It is well established that migraine is a multifactorial disorder. A deep understanding of migraine should be based upon both the underlying traits and the current states affected by different physiological, psychological, and environmental factors. At this point, there is no framework fully meeting these criteria. Here, we describe a broader view of the migraine disorder defined as a dysfunctional brain state and trait interaction. In this model, we consider events that may enhance or diminish migraine responsivity based on an individual's trait and state. This could provide an expanded view for considering how migraine attacks are sometimes precipitated by "triggers" and sometimes not, how these factors only lead to migraine attacks in migraine patients, or how individuals with an increased risk for migraine do not show any symptoms at all. Summarizing recent studies and evidence that support the concept of migraine as a brain state-trait interaction can also contribute to improving patient care by highlighting the importance of precision medicine and applying measures that are able to capture how different traits and states work together to determine migraine.

Depressive symptoms during the different phases of a migraine attack: A prospective diary study

BACKGROUND

The relationship between migraine and depression has been thoroughly investigated, indicating a bidirectional comorbidity. The exact temporal relationship between acute depressive symptoms (mood changes) and the various phases of the migraine attack has not yet been examined.

METHODS

We performed a prospective diary study in n = 487 participants with migraine. Participants filled out a daily diary on migraine and acute depressive symptoms during a 1-month period. We randomly selected one migraine attack per participant, consisting of six days around an attack, including the interictal, premonitory, ictal, and postdromal phases. Acute depressive symptoms covered five major items from the DSM-5 classification. Primary analysis was performed using a mixed model with post-hoc testing. We also tested whether lifetime depression influenced the presence of acute depressive symptoms.

RESULTS

During a migraine headache day, patients scored higher on acute depressive symptoms than on all other days of the migraine attack (p < 0.001). There were no early warning signs for an upcoming headache attack through acute depressive symptomatology. Migraine patients with lifetime depression scored overall higher during the migraine attack than those without lifetime depression (p < 0.001).

LIMITATIONS

Migraine attacks were based on self-reported migraine and one migraine attack per patient was randomly selected.

CONCLUSION

We now clearly demonstrate that during the migraine headache phase, but not in the prodromal phase, patients report increased depressive symptomatology. No evidence was found for mood changes as an early warning sign for an upcoming migraine attack.

A replication study separates polymorphisms behind migraine with and without depression

The largest migraine genome-wide association study identified 38 candidate loci. In this study we assessed whether these results replicate on a gene level in our European cohort and whether effects are altered by lifetime depression. We tested SNPs of the loci and their vicinity with or without interaction with depression in regression models. Advanced analysis methods such as Bayesian relevance analysis and a neural network based classifier were used to confirm findings. Main effects were found for rs2455107 of PRDM16 (OR = 1.304, p = 0.007) and five intergenic polymorphisms in 1p31.1 region: two of them showed risk effect (OR = 1.277, p = 0.003 for both rs11209657 and rs6686879), while the other three variants were protective factors (OR = 0.4956, p = 0.006 for both rs12090642 and rs72948266; OR = 0.4756, p = 0.005 for rs77864828). Additionally, 26 polymorphisms within ADGRL2, 2 in REST, 1 in HPSE2 and 33 mostly intergenic SNPs from 1p31.1 showed interaction effects. Among clumped results representing these significant regions, only rs11163394 of ADGRL2 showed a protective effect (OR = 0.607, p = 0.002), all other variants were risk factors (rs1043215 of REST with the strongest effect: OR = 6.596, p = 0.003). Bayesian relevance analysis confirmed the relevance of intergenic rs6660757 and rs12128399 (p31.1), rs1043215 (REST), rs1889974 (HPSE2) and rs11163394 (ADGRL2) from depression interaction results, and the moderate relevance of rs77864828 and rs2455107 of PRDM16 from main effect analysis. Both main and interaction effect SNPs could enhance predictive power with the neural network based classifier. In summary, we replicated p31.1, PRDM16, REST, HPSE2 and ADGRL2 genes with classic genetic and advanced analysis methods. While the p31.1 region and PRDM16 are worthy of further investigations in migraine in general, REST, HPSE2 and ADGRL2 may be prime candidates behind migraine pathophysiology in patients with comorbid depression.

Bidirectional Relations Among Depression, Migraine, and Epilepsy: Do They Have an Impact on Their Response to Treatment?

The evaluation and treatment of patients with epilepsy is not limited to the type of epilepsy, but it must incorporate the common comorbid neurologic, psychiatric, and medical disorders, as the latter can bare an impact on the course and response to treatment of the seizure disorder and vice versa. In this article we review the bidirectional relations among epilepsy and two of its most common comorbidities, mood disorders and migraine and examine the implications of these relations on the selection of therapies of these three disorders and their response to treatment. We also review the most salient common pathogenic mechanisms that may explain such relations.

What is the link between migraine and psychiatric disorders? From epidemiology to therapeutics

The association between migraine and psychiatric disorders is well documented through numerous population-based studies. The results of these studies are coherent and show an increased risk of suffering from depression, bipolar disorders, numerous anxiety disorders, especially post-traumatic stress disorder. This raises the question of stress as a precipitating factor for migraine illness. Psychiatric comorbidity is even more frequent in chronic migraine than in episodic migraine patients. Many prospective studies have shown that psychiatric comorbidity could be considered as a risk factor for migraine chronicization. Psychiatric comorbidity is also responsible for an increase of the frequency of anti-migraine drug intake, a worsening of quality of life and a worsening of functional impairment. It is also responsible for an increase in the direct and indirect costs of migraine. The reason why psychiatric comorbidity is so high in migraineurs is not unambiguous. Multiple causal relationships and common etiological factors are linked. Recently, genome-wide association studies gave leads to a genetic common heritability between major depressive disorder and migraine. For clinicians, an important topic remains how to treat migraineurs with psychiatric comorbidity. These patients suffer frequently from severe migraine or refractory migraine. Antidepressant and anti-convulsive drugs can be useful, as well as psychological therapies. But moreover, it is of utmost importance to propose an integrated multidisciplinary approach to these difficult patients.

Pathophysiological Bases of Comorbidity in Migraine

Despite that it is commonly accepted that migraine is a disorder of the nervous system with a prominent genetic basis, it is comorbid with a plethora of medical conditions. Several studies have found bidirectional comorbidity between migraine and different disorders including neurological, psychiatric, cardio- and cerebrovascular, gastrointestinal, metaboloendocrine, and immunological conditions. Each of these has its own genetic load and shares some common characteristics with migraine. The bidirectional mechanisms that are likely to underlie this extensive comorbidity between migraine and other diseases are manifold. Comorbid pathologies can induce and promote thalamocortical network dysexcitability, multi-organ transient or persistent pro-inflammatory state, and disproportionate energetic needs in a variable combination, which in turn may be causative mechanisms of the activation of an ample defensive system with includes the trigeminovascular system in conjunction with the neuroendocrine hypothalamic system. This strategy is designed to maintain brain homeostasis by regulating homeostatic needs, such as normal subcortico-cortical excitability, energy balance, osmoregulation, and emotional response. In this light, the treatment of migraine should always involves a multidisciplinary approach, aimed at identifying and, if necessary, eliminating possible risk and comorbidity factors.

Impacts of migraine on the prevalence and clinical presentation of depression: A population-based study

BACKGROUND

A close association has been reported between depression and migraine. However, information concerning the impacts of migraine on the clinical presentation and prevalence of depression in a population-based study is currently limited.

METHODS

Data from the Korean Headache-Sleep Study, a nationwide survey about headache and sleep for adults aged 19-69 years were used. Depression was defined when Patient Health Questionnaire-9 score ≥ 10.

RESULTS

Of 2,695 participants who included in this study, 116 (4.3%), 143 (5.3%), and 1130 (41.9%) had depression, migraine, and non-migraine headache, respectively. Migraine (24/116 [20.5%] vs. 119/2579 [4.7%], p < 0.001) and non-migraine headache (67/116 [58.1%] vs. 1063/2579 [41.3%], p < 0.001) was more prevalent in the group of participants with depression than among participants without depression. Among participants with depression, there was no statistically differences in total Patient Health Questionnaire-9 (PHQ-9) scores among migraine, non-migraine headache, and non-headache groups (median with interquartile range, 12.0 [10.2-18.0] vs. 13.0 [11.0-16.0] vs. 12.0 [10.0-15.2], p = 0.514). Among subcomponent scores of PHQ-9, all subcomponent scores did not significantly differ by headache status except feeling tired or having little energy scores (non-migraine headache 2.0 [2.0-3.0] vs. non-headache 2.0 [1.0-2.0], p = 0.010).

LIMITATIONS

Diagnosis of depression based on PHQ-9 questionnaire and small sample size in subgroup analyses.

CONCLUSIONS

Participants with depression exhibit an increased risk of migraine and non-migraine headache compared with participants without depression. Among participants with depression, the severity of depression did not significantly differ on the basis of headache status.

Cross-trait analyses with migraine reveal widespread pleiotropy and suggest a vascular component to migraine headache

BACKGROUND

Nearly a fifth of the world's population suffer from migraine headache, yet risk factors for this disease are poorly characterized.

METHODS

To further elucidate these factors, we conducted a genetic correlation analysis using cross-trait linkage disequilibrium (LD) score regression between migraine headache and 47 traits from the UK Biobank. We then tested for possible causality between these phenotypes and migraine, using Mendelian randomization. In addition, we attempted replication of our findings in an independent genome-wide association study (GWAS) when available.

RESULTS

We report multiple phenotypes with genetic correlation (P  < 1.06 × 10-3) with migraine, including heart disease, type 2 diabetes, lipid levels, blood pressure, autoimmune and psychiatric phenotypes. In particular, we find evidence that blood pressure directly contributes to migraine and explains a previously suggested causal relationship between calcium and migraine.

CONCLUSIONS

This is the largest genetic correlation analysis of migraine headache to date, both in terms of migraine GWAS sample size and the number of phenotypes tested. We find that migraine has a shared genetic basis with a large number of traits, indicating pervasive pleiotropy at migraine-associated loci.

The Relationship Between Parental Care and Pain in Children With Headache: A Narrative Review

PURPOSE

In migraine or primary headache in children, parents play a fundamental role in pain management. For this narrative review, PubMed, Google Scholar, and Psych Info were searched using the terms "parent headache", "mother/father headache", "parental impact headache", "alexithymia parents headache", "catastrophizing parent headache", "family headache", "children parent headache", and "quality of life family headache". Articles were chosen for inclusion based on their relevance in to the topic.

OVERVIEW

Several parental and psychological characteristics can influence in children and adolescent headache, such as parental attitudes as oppressive or overprotective; punitive parenting styles; familial psychological symptoms, especially anxiety and depression; catastrophizing about their child's pain or excessive worry about their child's headache; inability to express emotions; and feelings that may lead to somatization problems.

DISCUSSION

Parents' attitudes and behaviors toward their child's headache have a strong relation with the severity of headache attacks. Mothers seem to have more influence than fathers on children's pain and emotional regulation. We suggest that the presence of caregiver-child transmission of maladaptive coping strategies, arising from difficulties expressing emotion, may lead to incorrect management of headache pain, further facilitating headache chronification.

The Role of Positive Health Behaviors in the Relationship Between Early Life Stress and Migraine

BACKGROUND

The use of diet and physical activity in alleviating the burden of migraine is unclear, therefore, more scientific study on the role of positive health behaviors in migraine management is needed.

OBJECTIVE

To explore the potential moderating influence of positive health behaviors on the early life stress-migraine relationship in a sample of the Canadian adult population.

METHODS

This study used data from the 2011-2012 Canadian Community Health Survey - Annual Component, a National cross-sectional survey. Adults ≥18 years of age residing in British Columbia were surveyed about stressors experienced as children/teenagers (eg, parental divorce and substance abuse exposure). Migraine was self-report of health-professional diagnosis. Positive health behaviors were measured using an index of transportation and leisure time physical activity, and self-reported frequency of vegetable and fruit consumption. Population survey weights were employed throughout and analytic models were adjusted for known confounders (n_unweighted  = 11,910).

RESULTS

The weighted prevalence of migraine was 9.7% (95% CI: 9.1%, 10.2%). Odds of migraine increased as number of stressors increased: 1 early life stressor (OR = 1.18, 95% CI: 1.01, 1.39), and ≥ 2 early life stressors (OR = 1.51, 95% CI: 1.29, 1.76), compared to no stress. There was evidence of effect modification by physical activity (χ² (4) = 16.02, P < .001). The association between 1 early life stressor and migraine was lower for those who were physically active (moderately active: OR = 1.20, 95% CI: 0.90, 1.61; active: OR = 0.82, 95% CI: 0.61, 1.11). This difference was not apparent for those who experienced 2 or more early life stressors (moderately active: OR = 1.67, 95% CI: 1.28, 2.17; active: OR = 1.55, 95% CI: 1.21, 1.99). Across all levels of early life stress, physically active respondents had lower odds of migraine than moderately active respondents. There was no effect modification by vegetable, fruit, and total fruit/vegetable consumption.

CONCLUSIONS

Stressors experienced early in life are associated with migraine, and physical activity may ameliorate this relationship, particularly for those with exposure to a minimal level of early life stress. A higher dose of physical activity may yield greater benefit than a less intensive dose (ie, moderate activity level). However, the cross-sectional nature of this study precludes us from inferring causality, and future investigation requires prospectively collected data.

Irritability and its relationships with psychological symptoms in adolescents with migraine: a case-control study

OBJECTIVE

The aim of this study was to investigate self- and parent-reported irritability in adolescents with migraine and to evaluate the relationship between self- and parent-reported irritability and psychological symptoms in adolescents with migraine.

METHODS

The sample of this single-center cross-sectional case-control study consisted of 71 adolescents with migraine (who were followed in a pediatric neurology clinic) and their parents. The control group consisted of 41 age- and sex-matched healthy adolescents and their parents.

RESULTS

It was observed that there were significant differences in both self- (p < 0.001) and parent-reported (p < 0.001) irritability scores between the migraine and control groups. When the two groups were compared in terms of psychological symptoms, adolescents with migraine had significantly higher levels of anxiety (p < 0.001) and emotional problems (p < 0.001) than their healthy peers. This significant difference persisted even after controlling for confounding factors such as age, gender, family income, and maternal and paternal educational level. Our results revealed a moderate positive correlation between irritability scores and anxiety scores (r = 0.522, p < 0.001) and between irritability scores and emotional/behavioral problem scores (r = 0.487, p < 0.001) in the migraine group. In addition to these results, the odds ratios of self-reported irritability scores and emotional problem scores for migraine were 1.31 and 1.41, respectively.

CONCLUSION

The levels of anxiety, emotional/behavioral, and attention deficit/hyperactivity problems increased as the levels of irritability increased in the migraine group, suggesting that the psychosocial functionality of these adolescents may be impaired. Therefore, all adolescents with migraine (especially those with irritability) may have need of psychosocial support.

Suicide Attempts among Those with Migraine: Findings from a Nationally Representative Canadian Study

The objectives of this study were to identify the gender-specific prevalence of suicide attempts among those with migraine and to examine what factors are associated with suicide attempts among migraineurs. This study was a nationally representative analysis of the 2012 Canadian Community Health Survey - Mental Health (CCHS-MH) with 21,744 respondents, of whom 2,223 had migraine. Bivariate and logistic regression analyses were conducted. Those with migraine had a much higher prevalence of ever attempting suicide than those without migraine (men: 7.5% vs 1.9%; women; 9.3% vs 2.7%, p < .001). Among migraineurs, the odds of suicide attempts were higher among poorer respondents, those in chronic pain and those with a history of childhood adversities, substance dependence and/or mental illness. Targeted outreach is needed to reduce suicidality in this vulnerable population.

Response Predictors in Chronic Migraine: Medication Overuse and Depressive Symptoms Negatively Impact Onabotulinumtoxin-A Treatment

Background: Despite numerous studies that have investigated clinical, radiological, and biochemical response predictors, the clinical profile of those patients who might benefit from OnabotulinumtoxinA is still missing. The aim of the present study was to identify potential OnabotulinumtoxinA response predictors among several clinical characteristics and confirm OnabotulinumtoxinA efficacy and safety in chronic migraine (CM) prevention.

Methods: The study was conducted at the Headache Center—Neurology Clinic—Spedali Civili Hospital of Brescia. Eighty-four consecutive CM patients were enrolled, with a mean age of 48 years (SD 9.7) and a mean disease duration of 10.1 years (SD 6.6). The mean reported headache-days frequency was 22.5 (SD 5.9) per month, while the mean number of severe headache-days was 15.2 (SD 8.9) with a mean monthly medication intake of 33.2 (SD 5.6). The clinical characteristics analyzed as potential response predictors were: gender, disease duration, migraine characteristics (location, side constancy, unilateral autonomic and neurovegetative symptoms), previous prophylactic treatments, add-on therapies, withdrawal therapies, psychiatric (anxiety and depression symptoms) comorbidities and medication overuse.

Results: A significant reduction from baseline to 3, 6, 9, and 12 month treatment cycles in total headache days, high intensity headache days and triptans consumption per month was found. Depressive symptoms and medication overuse negatively predicted OnabotulinumtoxinA outcome.

Conclusions: Our results confirm the efficacy and safety of OnabotulinumtoxinA in CM. Depressive comorbidity and medication overuse, among all clinical variables, were the only significant response predictors. Such findings provide interesting insights regarding patients selection for OnabotulinumtoxinA treatment as, with the introduction of anti calcitonin gene-related (CGRP) monoclonal antibodies, clinicians will have to thoroughly judge and tailor among the many available therapeutic options now available. Future research might be needed to confirm our findings, in particular for its therapeutic implications.

The exploration of mechanisms of comorbidity between migraine and depression

Migraine comorbid with depression is common and is often encountered in clinical practice. The comorbidity may lead to more serious conditions with other symptoms and a longer duration of treatment and it may impose heavy economic and social burdens, directly or indirectly, on patients and their families. Numerous studies have been published on the association of migraine with depression. Numerous literature have showed that the comorbidity may have a common complicated pathogenic mechanism involving biopsychosocial characteristics, including abnormal brain development and shared genetic basis, as well as neurotransmitters, sex hormones and stress. In addition, some studies have identified the multiple, bidirectional relationship between migraine and depressive disorder. We searched the literature for the possible common mechanisms between migraine and depression and classified the research results.

Understanding the nature of psychiatric comorbidity in migraine: a systematic review focused on interactions and treatment implications

BACKGROUND

Migraine is a highly prevalent and disabling neurological disorder which is commonly linked with a broad range of psychiatric comorbidities, especially among subjects with migraine with aura or chronic migraine. Defining the exact nature of the association between migraine and psychiatric disorders and bringing out the pathophysiological mechanisms underlying the comorbidity with psychiatric conditions are relevant issues in the clinical practice.

METHODS

A systematic review of the most relevant studies about migraine and psychiatric comorbidity was performed using "PubMed", "Scopus", and "ScienceDirect" electronic databases from 1 January 1998 to 15 July 2018. Overall, 178 studies met our inclusion criteria and were included in the current review.

RESULTS

According to the most relevant findings of our overview, the associations with psychiatric comorbidities are complex, with a bidirectional association of major depression and panic disorder with migraine. Importantly, optimizing the pharmacological and non-pharmacological treatment of either migraine or its psychiatric comorbidities might help clinicians to attenuate the burden of both these conditions.

CONCLUSIONS

The available data highlight the need for a comprehensive evaluation of psychiatric disorders in migraine in order to promote an integrated model of care and carefully address the burden and psychosocial impairment related to psychiatric comorbidities in migraine.

Bidirectional relations among common psychiatric and neurologic comorbidities and epilepsy: Do they have an impact on the course of the seizure disorder?

The treatment of epilepsy is not limited to the achievement of a seizure‐free state. It must also incorporate the management of common psychiatric and neurologic comorbidities, affecting on average between 30 and 50% of patients with epilepsy, which have a significant impact on their lives at various levels, including quality of life and the prognosis of the seizure disorder. Mood and anxiety disorders are the most frequent psychiatric comorbidities, whereas stroke and migraine are among the more common neurologic comorbidities, migraine among the younger patients and stroke among the older patients. Not only do these psychiatric and neurologic comorbidities each have a bidirectional relation with epilepsy, but primary mood disorders have a bidirectional relation with these 2 neurologic disorders. Furthermore, depression and migraine have been each associated with a more severe epilepsy course, whereas depression has been associated with a more severe course of stroke and migraines. The purpose of this article is to review the clinical implications of the complex relations among epilepsy and these 3 comorbid disorders, and to identify any clinical and/or experimental evidence that may suggest that having more than one of these comorbid disorders may increase the risk of and course of epilepsy.

Molecular genetic overlap between migraine and major depressive disorder

Migraine and major depressive disorder (MDD) are common brain disorders that frequently co-occur. Despite epidemiological evidence that migraine and MDD share a genetic basis, their overlap at the molecular genetic level has not been thoroughly investigated. Using single-nucleotide polymorphism (SNP) and gene-based analysis of genome-wide association study (GWAS) genotype data, we found significant genetic overlap across the two disorders. LD Score regression revealed a significant SNP-based heritability for both migraine (h² = 12%) and MDD (h² = 19%), and a significant cross-disorder genetic correlation (r_G = 0.25; P = 0.04). Meta-analysis of results for 8,045,569 SNPs from a migraine GWAS (comprising 30,465 migraine cases and 143,147 control samples) and the top 10,000 SNPs from a MDD GWAS (comprising 75,607 MDD cases and 231,747 healthy controls), implicated three SNPs (rs146377178, rs672931, and rs11858956) with novel genome-wide significant association (P_SNP ≤ 5 × 10^-8) to migraine and MDD. Moreover, gene-based association analyses revealed significant enrichment of genes nominally associated (P_gene-based ≤ 0.05) with both migraine and MDD (P_{binomial-test} = 0.001). Combining results across migraine and MDD, two genes, ANKDD1B and KCNK5, produced Fisher's combined gene-based P values that surpassed the genome-wide significance threshold (P_{Fisher's-combined} ≤ 3.6 × 10^-6). Pathway analysis of genes with P_{Fisher's-combined} ≤ 1 × 10^-3 suggested several pathways, foremost neural-related pathways of signalling and ion channel regulation, to be involved in migraine and MDD aetiology. In conclusion, our study provides strong molecular genetic support for shared genetically determined biological mechanisms underlying migraine and MDD.

What Are the Psychosocial Factors Associated With Migraine in the Child? Comorbid Psychiatric Disorders, Family Functioning, Parenting Style, or Mom's Psychiatric Symptoms?

OBJECTIVE

Psychiatric diagnoses, parenting style, family functioning among children and adolescents with migraine, and psychiatric symptoms of their mothers were examined.

METHODS

The K-SADS and other measurements were used to assess psychiatric disorders in 50 children with migraine (aged 8-18) and matched 50 controls.

RESULTS

At least one psychiatric disorder was diagnosed in 56% of the migraine group. The presence of any psychiatric disorder in children (odds ratio [OR] = 2.765, P = .027) and somatization symptoms in their mothers (OR = 2.061, P = .025) were increasing the risk of migraine diagnosis. The parenting style scale assessments revealed that parents in the migraine group grant their children less autonomy.

CONCLUSION

Psychiatric comorbidity, especially depression and anxiety disorders, is more common in children with migraine. The frequency of eating disorder is also higher. Evaluating comorbidity, family functioning, and particularly affective responsiveness in migraine families may guide the clinician to a targeted treatment plan.

Psychological and Behavioral Issues in the Management of Migraine in Children and Adolescents

PURPOSE OF REVIEW

It is sometimes assumed that children and adolescents with migraine have a psychiatric or behavioral comorbidity, a belief that can be stigmatizing. This review will examine the recent literature addressing this area to determine if pediatric and adolescent migraineurs are at increased risk for psychiatric comorbidity and to discuss management strategies.

RECENT FINDINGS

A large systematic review of pediatric and adolescent studies concluded anxiety and depression were not associated with onset of recurrent headaches. Children with increasing migraine frequency have reduced school attendance. Pediatric migraineurs have mildly lower quality of life (QOL) scores than healthy peers but not abnormally low. Finally, children with higher migraine frequency as well as migraineurs with aura were more likely to report suicidal ideation. Migraine is a primary neurologic disorder. Migraine and psychiatric disorders may be comorbid; however, at this time, it can be difficult to clearly delineate some migraine features from psychiatric diagnoses with the current screening tools available. The majority of pediatric migraineurs do not have behavioral comorbidities; however, when such comorbidities occur, they should be addressed and appropriately managed. We need more accurate ways of delineating psychiatric and behavioral comorbidities from the migraine phenotype.

Psychiatric Comorbidities and Environmental Triggers in Patients with Chronic Daily Headache: A Lifestyle Study

Objective: Patients with chronic daily headache (CDH) suffer from several significant psychiatric comorbidities and have unhealthy lifestyle. We aimed at studying psychiatric comorbidities, environmental triggers, lifestyle factors, and intensity of CDH in patients referred by the department of neurology from 2011 to 2014. Method: Through medical and psychiatric interviews and using 0 to 10 visual analogue scale (VAS), we assessed patients with CDH, using a checklist, to elicit psychiatric comorbidities, intensity of CDH, environmental factors, and lifestyle derangement. Results: We interviewed 413 (age 16-80 years, mean 40 +/- 14.0) out of 548 patients; 312 (75.5%) were married, and 282 (68.1%) were female. Environmental triggers (374, 90.6%) were the most common cause of CDH, while 214 (51.8%) had no compliance to recommended nutrition. Exercise avoidance (201, 48.7%) was the less prevalent lifestyle factor. Of the patients, 372 (90.1%) were stressed and 162 (39.2%) had obsessive-compulsive disorder (OCD), which were the most and less prevalent psychiatric comorbidities, respectively. Intensity of pain was moderate to severe (mean score = 7.1+/- 1.9), while females reported higher VAS scores (p<0.02). Patients with previous history of psychotherapy reported higher score of VAS (p<0.001). Those patients living with a person suffering from head pain reported more VAS score (p<0.003). Conclusion: Notable psychiatric comorbidities were found in patients with CDH, many of which are modifiable such as environmental triggers and unhealthy lifestyle. In heavily populated cities, these factors may double the burden of the CDH by precipitating new or exacerbating previous psychiatric comorbidities. We, thus, suggest conducting more studies on this subject.

Rumination in migraine: Mediating effects of brooding and reflection between migraine and psychological distress

OBJECTIVE

The relationship between migraine and psychological distress has been consistently reported in cross-sectional and longitudinal studies. We hypothesised that a stable tendency to perseverative thoughts such as rumination would mediate the relationship between migraine and psychological distress. Design and Main Outcomes Measures: Self-report questionnaires measuring depressive rumination, current psychological distress and migraine symptoms in two independent European population cohorts, recruited from Budapest (N = 1139) and Manchester (N = 2004), were used. Structural regression analysis within structural equation modelling was applied to test the mediational role of brooding and reflection, the components of rumination, between migraine and psychological distress. Sex, age and lifetime depression were controlled for in the analysis.

RESULTS

Migraine predicted higher brooding and reflection scores, and brooding proved to be a mediator between migraine and psychological distress in both samples, while reflection mediated the relationship significantly only in the Budapest sample.

CONCLUSIONS

Elevated psychological distress in migraine is partially attributed to ruminative response style. Further studies are needed to expand our findings to clinical samples and to examine how rumination links to the adjustment to migraine.

Shared Genetic Factors Underlie Migraine and Depression

Migraine frequently co-occurs with depression. Using a large sample of Australian twin pairs, we aimed to characterize the extent to which shared genetic factors underlie these two disorders. Migraine was classified using three diagnostic measures, including self-reported migraine, the ID migraine™ screening tool, or migraine without aura (MO) and migraine with aura (MA) based on International Headache Society (IHS) diagnostic criteria. Major depressive disorder (MDD) and minor depressive disorder (MiDD) were classified using the Diagnostic and Statistical Manual of Mental Disorders (DSM) criteria. Univariate and bivariate twin models, with and without sex-limitation, were constructed to estimate the univariate and bivariate variance components and genetic correlation for migraine and depression. The univariate heritability of broad migraine (self-reported, ID migraine, or IHS MO/MA) and broad depression (MiDD or MDD) was estimated at 56% (95% confidence interval [CI]: 53-60%) and 42% (95% CI: 37-46%), respectively. A significant additive genetic correlation (r G = 0.36, 95% CI: 0.29-0.43) and bivariate heritability (h 2 = 5.5%, 95% CI: 3.6-7.8%) was observed between broad migraine and depression using the bivariate Cholesky model. Notably, both the bivariate h 2 (13.3%, 95% CI: 7.0-24.5%) and r G (0.51, 95% CI: 0.37-0.69) estimates significantly increased when analyzing the more narrow clinically accepted diagnoses of IHS MO/MA and MDD. Our results indicate that for both broad and narrow definitions, the observed comorbidity between migraine and depression can be explained almost entirely by shared underlying genetically determined disease mechanisms.

Genetic epidemiology of migraine and depression

Background

Migraine and major depressive disorder (commonly referred to as depression) are both common disorders with a significant impact on society. Studies in both clinical and community-based settings have demonstrated a strong relationship between migraine and depression. In addition to complicating the diagnosis, depression that is comorbid with migraine may lower treatment adherence, increase risk of medication overuse and is associated with migraine chronification, thus leading to higher direct and indirect costs and poorer health-related outcomes with increased disability.

Aim

The aim of this review is to summarise the current knowledge on the genetic epidemiology of migraine and depression and the possible biological mechanisms underlying their comorbidity.

Methods

We present a narrative review reporting on the current literature.

Results and conclusions

Epidemiological findings indicate that there is a bidirectional relationship between migraine and depression, with one disorder increasing the risk for the other and vice versa, suggesting shared biological mechanisms. Twin and family studies indicate that this bidirectional relationship can be explained, at least partly, by shared underlying genetically determined disease mechanisms. Although no genes have been robustly associated with the aetiology of both migraine and depression, genes from serotonergic, dopaminergic and GABAergic systems together with variants in the MTHFR and BDNF genes remain strong candidates.

The Genetics of Stress-Related Disorders: PTSD, Depression, and Anxiety Disorders

Research into the causes of psychopathology has largely focused on two broad etiologic factors: genetic vulnerability and environmental stressors. An important role for familial/heritable factors in the etiology of a broad range of psychiatric disorders was established well before the modern era of genomic research. This review focuses on the genetic basis of three disorder categories-posttraumatic stress disorder (PTSD), major depressive disorder (MDD), and the anxiety disorders-for which environmental stressors and stress responses are understood to be central to pathogenesis. Each of these disorders aggregates in families and is moderately heritable. More recently, molecular genetic approaches, including genome-wide studies of genetic variation, have been applied to identify specific risk variants. In this review, I summarize evidence for genetic contributions to PTSD, MDD, and the anxiety disorders including genetic epidemiology, the role of common genetic variation, the role of rare and structural variation, and the role of gene-environment interaction. Available data suggest that stress-related disorders are highly complex and polygenic and, despite substantial progress in other areas of psychiatric genetics, few risk loci have been identified for these disorders. Progress in this area will likely require analysis of much larger sample sizes than have been reported to date. The phenotypic complexity and genetic overlap among these disorders present further challenges. The review concludes with a discussion of prospects for clinical translation of genetic findings and future directions for research.

Symptom dimensions of affective disorders in migraine patients

OBJECTIVE

A strong association has been established between migraine and depression. However, this is the first study to differentiate in a large sample of migraine patients for symptom dimensions of the affective disorder spectrum.

METHODS

Migraine patients (n=3174) from the LUMINA (Leiden University Medical Centre Migraine Neuro-analysis Program) study and patients with current psychopathology (n=1129), past psychopathology (n=477), and healthy controls (n=561) from the NESDA (Netherlands Study of Depression and Anxiety) study, were compared for three symptom dimensions of depression and anxiety. The dimensions -lack of positive affect (depression specific); negative affect (nonspecific); and somatic arousal (anxiety specific)- were assessed by a shortened adaptation of the Mood and Anxiety Symptom Questionnaire (MASQ-D30). Within the migraine group, the association with migraine specific determinants was established. Multivariate regression analyses were conducted.

RESULTS

Migraine patients differed significantly (p<0.001) from healthy controls for all three dimensions: Cohen's d effect sizes were 0.37 for lack of positive affect, 0.68 for negative affect, and 0.75 for somatic arousal. For the lack of positive affect and negative affect dimensions, migraine patients were predominantly similar to the past psychopathology group. For the somatic arousal dimension, migraine patients scores were more comparable with the current psychopathology group. Migraine specific determinants for high scores on all dimensions were high frequency of attacks and cutaneous allodynia during attacks.

CONCLUSION

This study shows that affective symptoms in migraine patients are especially associated with the somatic arousal component.

Psychiatric comorbidity in childhood and adolescence headache

Primary headaches among children and adolescents have a substantial impact on quality of life, daily activities, social interaction, and school performance in combination with psychopathological symptoms. The main purpose of the present paper is to summarize clinical and epidemiological evidence for psychiatric comorbidity among children and adolescents with headaches, to describe how evidence in headache research suggest different pathways involved in the development and maintenance of these comorbid conditions, and finally suggest some elements professionals may find helpful to assess the scope of complaints, related functional impairment, and potential precipitating factors in planning of more targeted treatments.

Social withdrawal as a self-management behavior for migraine: implications for depression comorbidity among disadvantaged women

Disadvantaged women with migraine headaches have a particularly high risk of developing comorbid depression and often isolate themselves from others-or socially withdraw-to manage these disorders. Despite this, little is known about whether or how social withdrawal as a self-management strategy for episodic migraine might contribute to the more severe symptom burden in this group. In this article, we explore the potentially cumulative, deleterious effect that this strategy may have in modulating migraine-depression symptom severity in this population and argue that further theoretical and empirical work from nursing and complexity science perspectives is needed to better understand this phenomenon.

Allodynia is associated with a higher prevalence of depression in migraine patients

Introduction

There is a strong association between migraine and depression. The aim of this study is to identify migraine-specific factors involved in this association.

Methods

We conducted a cross-sectional study in a large, well-defined cohort of migraine patients ( n = 2533). We assessed lifetime depression using validated questionnaires, and diagnosed migraine based on the International Classification of Headache Disorders III-beta criteria. Multivariate regression analyses were conducted.

Results

Of the 2533 migraineurs that were eligible, 1137 (45%) suffered from lifetime depression. The following independent factors were associated with an increased depression prevalence: i) migraine-specific risk factors: high migraine attack frequency and the presence of allodynia, ii) general factors: being a bad sleeper, female gender, high BMI, being single, smoking, and a low alcohol consumption.

Conclusion

This study identified allodynia, in addition to high migraine attack frequency, as a new migraine-specific factor associated with depression.

Genetic risk score analysis indicates migraine with and without comorbid depression are genetically different disorders

Migraine and major depressive disorder (MDD) are comorbid, moderately heritable and to some extent influenced by the same genes. In a previous paper, we suggested the possibility of causality (one trait causing the other) underlying this comorbidity. We present a new application of polygenic (genetic risk) score analysis to investigate the mechanisms underlying the genetic overlap of migraine and MDD. Genetic risk scores were constructed based on data from two discovery samples in which genome-wide association analyses (GWA) were performed for migraine and MDD, respectively. The Australian Twin Migraine GWA study (N = 6,350) included 2,825 migraine cases and 3,525 controls, 805 of whom met the diagnostic criteria for MDD. The RADIANT GWA study (N = 3,230) included 1,636 MDD cases and 1,594 controls. Genetic risk scores for migraine and for MDD were used to predict pure and comorbid forms of migraine and MDD in an independent Dutch target sample (NTR-NESDA, N = 2,966), which included 1,476 MDD cases and 1,058 migraine cases (723 of these individuals had both disorders concurrently). The observed patterns of prediction suggest that the 'pure' forms of migraine and MDD are genetically distinct disorders. The subgroup of individuals with comorbid MDD and migraine were genetically most similar to MDD patients. These results indicate that in at least a subset of migraine patients with MDD, migraine may be a symptom or consequence of MDD.

Current smoking as a predictor of chronic musculoskeletal pain in young adult twins

Chronic pain is common during adolescence and young adulthood and is associated with poor quality of life, depression, and functional disability. Recognizing that chronic pain has significant consequences, it is important to identify modifiable health behaviors that may place young adults at risk for chronic pain. This study examines associations between chronic musculoskeletal pain and smoking in young adult twins (n = 1,588, ages 18-30) participating in a statewide twin registry. Twins completed questionnaires assessing smoking, mood (anxiety, depressive symptoms, and stress), and chronic musculoskeletal pain. Analyses examined associations between chronic pain and smoking, particularly the role of genetics/shared familial factors and psychological symptoms. As predicted, results revealed a near-2-fold increased risk for chronic musculoskeletal pain in twins who currently smoked compared to nonsmokers, even when accounting for psychological factors. Results of within-pair analyses were only minimally attenuated, suggesting that associations between smoking and chronic musculoskeletal pain are better accounted for by nonshared factors than by shared familial factors/genetic effects. Future twin research is needed to identify what nonshared factors (eg, attitudes, direct effects of smoking on pain) contribute to these associations to further understand comorbidity. Longitudinal studies and recruitment of participants prior to smoking initiation and chronic pain onset will better identify causal associations.

PERSPECTIVE

This article describes associations between musculoskeletal pain and smoking in young adult twins, taking into account psychological symptoms. Findings highlight the importance of nonshared factors in associations between pain and smoking and the need to explore the roles of lifestyle, individual attitudes, and direct effects of smoking on pain.

Migraine and psychiatric comorbidities among sub-saharan african adults

BACKGROUND

Despite being a highly prevalent disorder and substantial cause of disability, migraine is understudied in Africa. Moreover, no previous study has investigated the effects of stress and unipolar psychiatric comorbidities on migraine in a sub-Saharan African cohort.

OBJECTIVE

To evaluate the prevalence of migraine and its association with stress and unipolar psychiatric comorbidities among a cohort of African adults.

METHODS

This was a cross-sectional epidemiologic study evaluating 2151 employed adults in sub-Saharan Africa. A standardized questionnaire was used to identify sociodemographic, headache, and lifestyle characteristics of participants. Migraine classification was based on the International Classification of Headache Disorders-2 diagnostic criteria. Depressive, anxiety, and stress symptoms were ascertained with the Patient Health Questionnaire and the Depression Anxiety Stress Scale, respectively. Multivariable logistic regression models were used to estimate adjusted odds ratio (OR) and 95% confidence intervals (CIs).

RESULTS

A total of 9.8% (n=212) of study participants fulfilled criteria for migraine (9.8%, 95% CI 8.6-11.1) with a higher frequency among women (14.3%, 95% CI 11.9-16.6) than men (6.9%, 95% CI 5.5-8.3). Similar to predominantly Caucasian migraine cohorts, sub-Saharan African migraineurs were more likely to be younger, have a lower education, and more likely to report a poor health status than non-migraineurs. However, in contrast with historical reports in predominantly Caucasian migraine cohorts, sub-Saharan African migraineurs were less likely to report smoking than non-migraineurs. Participants with moderately severe depressive symptoms had over a 3-fold increased odds of migraine (OR=3.36, 95% CI 1.30-8.70) compared with those classified as having minimal or no depressive symptoms, and the odds of migraine increased with increasing severity of depressive symptoms (P trend<0.001). Similarly, those with mild, moderate, and severe anxiety symptoms had increased odds of migraine (OR=2.28, 95% CI 1.24-4.21; OR=1.77, 95% CI 0.93-3.35; and OR=5.39, 95% CI 2.19-13.24, respectively). Finally, those with severe stress had a 3.57-fold increased odds of migraine (OR=3.57, 95% CI 1.35-9.46).

CONCLUSION

Although historically it has been reported that migraine prevalence is greater in Caucasians than African Americans, our study demonstrates a high migraine prevalence among urban-dwelling Ethiopian adults (9.9%) that is comparable with what is typically reported in predominantly Caucasian cohorts. Further, among employed sub-Saharan African adults and similar to predominantly Caucasian populations, migraine is strongly associated with stress and unipolar psychiatric symptoms. The high burden of migraine and its association with stress and unipolar psychiatric symptoms in our study of well-educated and urban-dwelling African adults has important clinical and public health implications pending confirmation in other African populations.

Migraine and Despair: Factors Associated with Depression and Suicidal Ideation among Canadian Migraineurs in a Population-Based Study

This study sought to (1) investigate the association between migraine and both depression and suicidal ideation and (2) to identify the factors independently associated with each of these mental health problems among Canadian men and women with migraine. Data were analyzed from the 2005 Canadian Community Health Survey (CCHS). Presence of migraine was assessed by self-report of a health professional diagnosis. Current depression was measured using the CIDI-SF, and suicidal ideation was based on a question about serious consideration of suicide at any point during the respondent's lifetime. Migraineurs were found to have elevated odds of depression (men: OR = 2.02; 95% CI = 1.70, 2.41; women: OR = 1.89; 95% CI = 1.71, 2.10) and suicidal ideation (men: OR = 1.70; 95% CI = 1.55, 1.96; women: OR = 1.72; 95% CI = 1.59, 1.86) even when adjusting for sociodemographic variables and disability status. The odds of depression and suicidal ideation were higher among both genders of migraineurs who were younger, unmarried and had more activity limitations; associations with poverty and race depended on gender and whether the focus was on depression or suicidal ideation. While screening for depression is already recommended for those with migraine, this research helps identify which migraineurs may require more immediate attention, including those who are younger, unmarried, and experiencing limitations in their activities.