Risk of MS is not associated with exposure to crude oil, but increases with low level of education.

BACKGROUND: Offshore workers in the Norwegian upstream petroleum industry are exposed to a number of chemicals such as organic solvents, mineral oils and other hydrocarbons, possibly contributing to an increased risk of multiple sclerosis (MS). OBJECTIVE: To estimate the risk of MS in this population compared with the general working population in Norway, adjusting for education. METHODS: Using the Norwegian Registry of Employers and Employees we included all 27,900 offshore workers registered from 1981 to 2003 and 366,805 referents from the general working population matched by gender, age and community of residence. The cohort was linked to the Norwegian MS Registry and the Norwegian Education Registry. RESULTS: There was no increased risk of MS among the offshore workers. We found a marked and linear inverse relationship between level of education and the risk of MS in the total study population, with a rate ratio of 0.48 (95% CI, 0.53 to 0.88) for workers with a graduate degree compared to workers with elementary school only. CONCLUSIONS: These findings do not support a major aetiological role of petroleum-based products, but rather point to smoking and other lifestyle factors related to the level of education as being important for the risk of MS.

Early detection of patients at risk for anxiety, depression and apathy after stroke.

BACKGROUND AND PURPOSE: The aim of this study was to identify clinical factors in the acute stage that can predict anxiety, depression and apathy at 4 months after stroke. METHODS: One hundred four consecutive stroke patients in a stroke unit were assessed within the first 2 weeks and after 4 months. Assessments included anxiety and depression symptoms on the Hospital Anxiety and Depression Scale (HADS) [HADS Anxiety subscale (HADS-A) > or = 8 and HADS Depression subscale (HADS-D) > or = 8], physical impairment, functional disability, somatic comorbidity upon admission, assessment of apathy (score > or = 34 on the Apathy Evaluation Scale) and a psychiatric Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition diagnosis of anxiety disorder (anxiety) or depression (depression) on follow-up. Logistic regression analysis was used to identify factors associated with anxiety, depression and apathy. RESULTS: Anxiety and depression at 4 months were significantly associated with HADS-A scores of > or = 8 upon admission [odds ratio (OR)=4.4; 95% confidence interval (95% CI)=1.7-11.9; P=.003 and OR=2.9; 95% CI=1.0-7.9; P=.043, respectively]. Apathy at 4 months was significantly associated with somatic comorbidity upon admission (OR=3.0; 95% CI=1.0-8.3; P=.036) and had a borderline association with HADS-D scores of > or = 8 (OR=8.4; 95% CI=1.0-72.0; P=.051) upon admission. CONCLUSION: Assessment with HADS within the first 2 weeks of stroke can contribute to the detection of patients at risk for clinically significant anxiety, depression and apathy at 4 months after stroke.

Screening for anxiety and depression after stroke: comparison of the hospital anxiety and depression scale and the Montgomery and Asberg depression rating scale.

OBJECTIVE: Anxiety and depression after stroke are frequent, but are often overlooked and not assessed. The aims of the study were to (1) assess the prevalence of anxiety and depression and (2) compare the performance of the Hospital Anxiety and Depression Scale (HADS) and Montgomery and Asberg Depression Rating Scale (MADRS) as screening instruments for anxiety and depression disorders 4 months after stroke. METHODS: Stroke patients, consecutively admitted to a stroke unit, were assessed with HADS and MADRS 4 months after stroke (n=104). Depression and anxiety disorders were diagnosed using the Structured Clinical Interview for DSM-IV (SCID). Measures were compared in terms of correlations, sensitivity, specificity, positive and negative predictive value, overall agreement, kappa, and ROC curves, using DSM-IV diagnoses of "at least one current significant anxiety disorder" (Anxiety) and "any current depression" (Depression), as the clinical criteria. RESULTS: Anxiety occurred in 23% of patients and Depression in 19% (13% major depression, 3% minor depression, 4% dysthymia). For Anxiety, the optimal screening cut-off was 4 for HADS-A and 6 for HADS-total; for Depression, optimal cut-offs were 4 for HADS-D, 11 for HADS-total, and 8 for MADRS. At cut-offs commonly used in clinical practice for depression screening (HADS-D: 8, MADRS: 12), the MADRS performed marginally better than the HADS. CONCLUSION: Anxiety is as prevalent as depression 4 months after stroke. MADRS and HADS-D perform acceptably as screening instruments for depression, and HADS-A for anxiety after stroke. However, lower HADS cut-offs than recommended for the general population should be considered for stroke patients.

Onset of epilepsy and menarche--is there any relationship?

PURPOSE: Women with epilepsy have increased frequency of reproductive health problems compared to women without epilepsy. In puberty, reproductive hormonal changes during sexual maturation may affect epilepsy and induce the debut of seizures as indicated in some studies. On the other hand, epileptic activity affects sex hormone function, which may induce alterations in pubertal endocrine maturation and thereby menarche age. We wanted to investigate the relation between epilepsy and menarche age in a larger population of female epilepsy patients. METHODS: A retrospective, questionnaire study of a cohort of 265 female outpatients from three Norwegian hospitals and 142 controls, aged 18-45 years was conducted. Parameters regarding epilepsy and reproductive health issues were registered. Perimenarche was defined as 2 years before and 2 years after the year of menarche. RESULTS: There was a significantly higher frequency of patients with epilepsy debut between 10 and 18 year compared to 0-9 years (p<0.01). There was, however, no significant difference in occurrence of epilepsy debut in the perimenarche period compared to the 5 year periods before and after perimenarche, and no significant difference in epilepsy debut in the year of menarche compared to the 5 years before or after. Menarche age was not significantly different in those with epilepsy debut before or after menarche. Epilepsy type (idiopathic generalised or partial) did not influence the menarche age. CONCLUSIONS: The study did not confirm the former observations of clustering of epilepsy debut at menarche or in the perimenarche period or alterations in menarche age in girls with epilepsy. However, onset of epilepsy is more frequent in the adolescent years (10-18), than in childhood (0-9).

Do women with epilepsy have increased frequency of menstrual disturbances?

PROBLEM: Menstrual disorders, reduced fertility and sexual problems seem to be more frequent in women with epilepsy than in the general population. Most investigations concerning menstrual disturbances in epilepsy patients, however, are small and based on selected materials. We therefore wanted to investigate the frequency of menstrual disturbances in a large, unselected population of epilepsy patients. METHODS: A retrospective, questionnaire study of a cohort of female outpatients, aged 18-45 was conducted. Each patient chose a close female friend who served as control, to optimise matching regarding age and lifestyle. RESULTS: Answers were received from 265 patients and 142 controls. Menstrual disturbances were more frequent in patients with epilepsy (48.0%) than in controls (30.7%) (P=0.004). Menstrual disturbances were more frequent in patients on polytherapy versus monotherapy (P=0.049) and more frequent in patients with high seizure frequency (>5seizures/year) compared to patients with a lower seizure frequency or those seizure free (P=0.006). The frequency of menstrual disturbances was higher in patients on valproate compared to carbamazepine monotherapy (P=0.045). CONCLUSION: This investigation confirms that women with epilepsy have an increased frequency of menstrual disturbances compared to women without epilepsy. In women with high seizure frequency and in those on polytherapy, the frequency of menstrual disturbances are further increased. The highest frequency of menstrual disturbances occurred in women using valproate.