Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Box 980126, Richmond, VA, 23298-0126, USA. kenneth.kendler@vcuhealth.org.
Nationwide data have been lacking on drug abuse (DA)-associated mortality. We do not know the degree to which this excess mortality results from the characteristics of drug-abusing individuals or from the effects of DA itself.
DA was assessed from medical, criminal, and prescribed drug registries. Relative pairs discordant for DA were obtained from the Multi-Generation and Twin Registers. Mortality was obtained from the Swedish Mortality registry.
We examined all individuals born in Sweden 1955-1980 (n = 2,696,253), 75,061 of whom developed DA. The mortality hazard ratio (mHR) (95% CIs) for DA was 11.36 (95% CIs, 11.07-11.66), substantially higher in non-medical (18.15, 17.51-18.82) than medical causes (8.05, 7.77-8.35) and stronger in women (12.13, 11.52-12.77) than in men (11.14, 10.82-11.47). Comorbid smoking and alcohol use disorder explained only a small proportion of the excess DA-associated mortality. Co-relative analyses demonstrated substantial familial confounding in the DA-mortality association with the strongest direct effects seen in middle and late-middle ages. The mHR was highest for opiate abusers (24.57, 23.46-25.73), followed by sedatives (14.19, 13.11-15.36), cocaine/stimulants (12.01, 11.36-12.69), and cannabis (10.93, 9.94-12.03).
The association between registry-ascertained DA and premature mortality is very strong and results from both non-medical and medical causes. This excess mortality arises both indirectly-from characteristics of drug-abusing persons-and directly from the effects of DA. Excess mortality of opiate abuse was substantially higher than that observed for all other drug classes. These results have implications for interventions seeking to reduce the large burden of DA-associated premature mortality.
Is vaginal breech delivery associated with higher risk for perinatal death and cerebral palsy compared with vaginal cephalic birth? Registry-based cohort study in Norway.
This paper aims to study if vaginal breech delivery is associated with increased risk for neonatal mortality (NNM) or cerebral palsy (CP) in Norway where vaginal delivery accounts for 1/3 of all breech deliveries.
Cohort study using information from the national Medical BirthRegister and Cerebral Palsy Register.
Births in Norway 1999-2009.
520 047 term-born singletons without congenital malformations.
NNM, CP and a composite outcome of these and death during birth.
Compared with cephalic births, breech births had substantially increased risk for NNM but not for CP. Vaginal delivery was planned for 7917 of 16?700 fetuses in breech, while 5561 actually delivered vaginally. Among these, NNM was 0.9 per 1000 compared with 0.3 per 1000 in vaginal cephalic delivery, and 0.8 per 1000 in those actually born by caesarean delivery (CD) in breech. Compared with planned cephalic delivery, planned vaginal delivery was associated with excess risk for NNM (OR 2.4; 95%?CI 1.2 to 4.9), while the OR associated with planned breech CD was 1.6 (95% CI 0.7 to 3.7). These risks were attenuated when NNM was substituted by the composite outcome. Vaginal breech delivery was not associated with excess risk for CP compared with vaginal cephalic delivery.
Vaginal breech delivery, regardless of whether planned or actual, and actual breech CD were associated with excess risk for NNM compared with vaginal cephalic delivery, but not with CP. The risk for NNM and CP in planned breech CD did not differ significantly from planned vaginal cephalic delivery. However, the absolute risk for these outcomes was low, and taking into consideration potential long-term adverse consequences of CD for the child and later deliveries, we therefore conclude that vaginal breech delivery may be recommended, provided competent obstetric care and strict criteria for selection to vaginal delivery.
Background Cognitive ability (CA) is positively related to later health, health literacy, health behaviours and longevity. Accordingly, a lower CA is expected to be associated with poorer adherence to medication. We investigated the long-term role of CA in adherence to prescribed statins in male patients after a first myocardial infarction (MI). Methods CA was estimated at 18-20 years of age from Military Conscript Register data for first MI male patients (=60 years) and was related to the one- and two-year post-MI statin adherence on average 30 years later. Background and clinical data were retrieved through register linkage with the unselected national quality register SWEDEHEART for acute coronary events (Register of Information and Knowledge about Swedish Heart Intensive Care Admissions) and secondary prevention (Secondary Prevention after Heart Intensive Care Admission). Previous and present statin prescription data were obtained from the Prescribed Drug Register and adherence was calculated as =80% of prescribed dispensations assuming standard dosage. Logistic regression was used to estimate crude and adjusted associations. The primary analyses used 2613 complete cases and imputing incomplete cases rendered a sample of 4061 cases for use in secondary (replicated) analyses. Results One standard deviation increase in CA was positively associated with both one-year (OR 1.15 (CI 1.01-1.31), P??20 covariates. Imputed and complete case analyses yielded very similar results. Conclusions CA estimated on average 30 years earlier in young adulthood is a risk indicator for statin adherence in first MI male patients aged =60 years. Future research should include older and female patients and more socioeconomic variables.
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Cites: Eur Heart J. 2014 Dec 7;35(46):3267-76 PMID 25265973
From the aNational Center for PTSD, VA Boston Healthcare System, Boston, MA; bDepartments of Psychiatry and Epidemiology, Boston University, Boston, MA; cDepartment of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark; and dDepartment of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA.
Evidence for the association between posttraumatic stress disorder (PTSD) and gastrointestinal (GI) disorders is mixed, owing in part to methodologic differences across studies. Furthermore, studies which have combined GI disorders or symptoms for examination as one overall category may potentially obscure associations between PTSD and individual GI diagnoses.
This nationwide cohort study examined the incidence of all major nonmalignant GI disorders in patients with a prior PTSD diagnosis (n = 4,076), compared with the general population incidence from 1995 to 2013, using Danish medical registry data. We examined differences by sex, age, marital status, psychiatric and somatic comorbidity, and follow-up time. Risks, standardized incidence rates (SIRs), and confidence intervals (95% CIs) were calculated.
Risk of any GI disorder among PTSD patients was 25% (95% CI: 21%, 29%); the SIR for any GI disorder was 1.8 (95% CI: 1.7, 2.0). Risk and SIRs varied by disorder (e.g., no association with diverticula of the intestines [SIR: 1.1, 95% CI: 0.83, 1.5]; stronger association with peptic ulcer, site unspecified [SIR: 3.3, 95% CI: 1.8, 5.5]). Stratified analyses revealed that some associations were stronger for persons ages 16-39 or unmarried at PTSD diagnosis, persons with comorbid psychiatric diagnoses, and in the year following PTSD diagnosis.
This study documents associations between clinician-diagnosed PTSD and all major nonmalignant GI disorders in an unselected nationwide cohort with long follow-up. Differences in associations across GI disorders and important modifiers may account for previous conflicting research findings.
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Cites: Drug Alcohol Depend. 2008 Apr 1;94(1-3):267-71 PMID 18093750
Cites: Clin Epidemiol. 2015 Nov 17;7:449-90 PMID 26604824
Cites: Am J Epidemiol. 1990 Jul;132(1):181-92 PMID 2192549
Background Coronary heart disease incidence, mortality and short-term case-fatality have improved substantially during the past decades. Recent changes in the long-term prognosis among survivors of acute coronary syndrome are less well known. Our aim was to investigate the long-term prognosis of acute coronary syndrome. Design An observational myocardial infarction register study. Methods Data was derived from the population based Finnish Myocardial Infarction register. Patients aged 35 or higher, who had their first acute coronary syndrome during 1993-2011 and survived the first 28 days, were included in the analysis ( n?=?13,336). Endpoints were fatal and non-fatal cardiovascular disease events and all-cause mortality at one year and three years after the index event. We also compared the prognosis of acute coronary syndrome survivors with the prognosis of an apparently healthy population with the same age, sex and area of residence, derived from the FINRISK study. Results Significant declines over time were observed in the risk of a new cardiovascular disease event. At three year follow-up the age- and study area-adjusted hazard ratio per calendar year was 0.969 (95% confidence interval 0.960-0.977, p?=?4.63?×?10-13) among men and 0.969 (95% confidence interval 0.961-0.978, p?=?1.01?×?10-11) among women. Despite the improvement in prognosis, the age-standardized three year cardiovascular disease free survival of acute coronary syndrome patients was significantly lower than in the FINRISK control group (for men p?=?6.64?×?10-27 and for women p?=?2.11?×?10-15). Conclusion The prognosis of acute coronary syndrome survivors has improved during the 18-year period but is still much worse than the prognosis of comparable general population.
To describe factors associated with prevalence or absence of microvascular and macrovascular complications in people with Type 1 diabetes of very long duration and to investigate the risk factors associated with the incidence of such complications.
We included individuals with Type 1 diabetes who had been entered in the Swedish National Diabetes Register between 2002 and 2004 (n = 18 450). First, risk factor distribution in people with diabetes duration of = 50 years was compared between people with and without complications. Second, the incidence of complications during a 10-year follow-up period was studied in all individuals who had no complications at baseline.
Among people with a diabetes duration of = 50 years (n = 1023), 453 (44%) had macrovascular disease, 534 (52%) had microvascular disease and 319 (31%) did not have either of the diagnoses. Factors that differed significantly between people with and without macrovascular disease were gender, age, HbA1c , BMI, LDL cholesterol, HDL cholesterol, triglycerides, systolic blood pressure, albuminuria, antihypertensive medication and lipid-lowering medication. The same factors differed significantly between people with and without microvascular disease, with the exception of gender and HDL cholesterol. During the follow-up period, 6.1% of the study cohort were diagnosed with macrovascular disease and 19.6% with microvascular disease. Incidence of macrovascular disease was significantly associated with HbA1c levels. Hazard ratios decreased with longer diabetes duration.
People with Type 1 diabetes who have survived = 50 years without complications are significantly younger, and have significantly lower HbA1c levels, BMI and triglyceride levels than survivors with complications. HbA1c level is a predictor of macrovascular disease, independently of diabetes duration.
From the aDepartment of Political Science, University of Copenhagen, Copenhagen, Denmark; bDepartment of Political Science, Stanford University, Stanford, CA; cDepartment of Political Science, Aarhus University, Aarhus, Denmark; dPsychiatric Center Copenhagen, Copenhagen University Hospital, Copenhagen, Denmark; eDepartment of Clinical Medicine, Aarhus University, Aarhus, Denmark; and fPsychosis Research Unit, Aarhus University Hospital, Risskov, Denmark.
Daylight savings time transitions affect approximately 1.6 billion people worldwide. Prior studies have documented associations between daylight savings time transitions and adverse health outcomes, but it remains unknown whether they also cause an increase in the incidence rate of depressive episodes. This seems likely because daylight savings time transitions affect circadian rhythms, which are implicated in the etiology of depressive disorder. Therefore, we investigated the effects of daylight savings time transitions on the incidence rate of unipolar depressive episodes.
Using time series intervention analysis of nationwide data from the Danish Psychiatric Central Research Register from 1995 to 2012, we compared the observed trend in the incidence rate of hospital contacts for unipolar depressive episodes after the transitions to and from summer time to the predicted trend in the incidence rate.
The analyses were based on 185,419 hospital contacts for unipolar depression and showed that the transition from summer time to standard time were associated with an 11% increase (95% CI = 7%, 15%) in the incidence rate of unipolar depressive episodes that dissipated over approximately 10 weeks. The transition from standard time to summer time was not associated with a parallel change in the incidence rate of unipolar depressive episodes.
This study shows that the transition from summer time to standard time was associated with an increase in the incidence rate of unipolar depressive episodes. Distress associated with the sudden advancement of sunset, marking the coming of a long period of short days, may explain this finding. See video abstract at, http://links.lww.com/EDE/B179.
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CommentIn: BMJ. 2016 Oct 31;355:i5857 PMID 27803014
To assess the socio-economic distribution of comorbid depression and diabetes among the Danish workforce using national registry data.
Using national registers, all eligible Danish adults aged 18-59 years on 1 January 1996 were followed until 31 December 2010. Diabetes status was obtained from the Danish National Diabetes Register and information on purchase of prescription antidepressants from the Register of Medicinal Product Statistics. Data were also obtained on people's occupational status and gross annual income. The people included in the study were stratified according to their highest occupational group during the study period. Annual incomes were adjusted to 2013 levels and, using the distribution of the study population's incomes, we stratified participants into income quintiles.
A total of 3 434 420 individuals met the inclusion criteria at baseline, with 98 006 developing diabetes during follow-up. There were 603 498 new prescriptions of antidepressants during follow-up; 19 849 (20.3%) among people with diabetes and 583 649 (17.5%) among those without. People with diabetes in all income quintiles (risk ratio 1.65; 95% CI 1.62-1.67) and all occupational groups (risk ratio 1.70; 95% CI 1.68- 1.73) had a significantly elevated risk compared with the general population. Risk ratios were significantly higher among the lowest occupational groups and income quintiles.
Our results provide robust data underlining the associations between diabetes, depression and socio-economic status. They highlight and encourage further focus on the issue of comorbid diabetes and depression, particularly among the most disadvantaged.
To determine the mortality rate in a Danish cohort of children and adolescents diagnosed with Type 1 diabetes mellitus compared with the general population.
In 1987 and 1989 we included 884 children and 1020 adolescents aged 20 years and under, corresponding to 75% of all Danish children and adolescents with Type 1 diabetes, in two nationwide studies in Denmark. Those who had participated in both investigations (n = 720) were followed until 1 January 2014, using the Danish Civil Registration System on death certificates and emigration. We derived the expected number of deaths in the cohort, using population data values from Statistics Denmark to calculate the standardized mortality ratio. Survival analysis was performed using Cox proportional hazards model.
During the 24 years of follow-up, 49 (6.8%) patients died, resulting in a standardized mortality ratio of 4.8 (95% confidence interval 3.5, 6.2) compared with the age-standardized general population. A 1% increase in baseline HbA1c (1989), available in 718 of 720 patients, was associated with all-cause mortality (hazard ratio = 1.38; 95% confidence interval 1.2, 1.6; P
To assess the causes of death and cause-specific standardized mortality ratios in two nationwide, population-based cohorts diagnosed with Type 1 diabetes during the periods 1973-1982 and 1989-2012, and to evaluate changes in causes of death during the follow-up period.
