Increase in incidence of anorexia nervosa among 10- to 14-year-old girls: A nationwide study in the Netherlands over four decades

OBJECTIVE

This primary care study examined time trends in the incidence of anorexia nervosa (AN) and bulimia nervosa (BN) in the Netherlands across four decades.

METHODS

A nationwide network of general practitioners, serving approximately 1% of the total Dutch population, recorded newly diagnosed patients with AN and BN in their practices from 1985 to 2019 (2,890,978 person-years). DSM-IV diagnostic criteria were consistently used and the same psychiatrist was responsible for the final diagnostic decision. Incidence rates (IRs) were calculated for: the total population (all ages), females overall, and females per 5-year age category. Time trends in IRs were analyzed using JoinPoint regression analyses.

RESULTS

In four decades, the incidence of AN among 10- to 14-year-old females increased significantly from 8.6 to 38.6 per 100,000 person-years (average period percentage change [APPC] = 56.7; 95% confidence interval [CI] = 6.5-130.6. The overall incidence of AN was stable, with IRs ranging from 6.0 (95% CI = 4.3-8.1) to 8.4 (95% CI = 6.4-10.8). The IR of BN decreased significantly from 8.7 (95% CI = 6.7-11.0) to 3.2 (95% CI = 2.0-4.9) in the 2000s, before leveling off in the 2010s (IR 3.2; 95% CI = 2.0-4.8).

DISCUSSION

The incidence of AN among 10- to 14-year-old girls increased significantly over four decades. Both biological and sociocultural factors, for example, early pubertal timing and the impact of social media, might explain this. In other age groups and overall, the incidence of AN remained stable. The significant decrease of the incidence of BN in the previous decades halted in the last decade.

PUBLIC SIGNIFICANCE

An important finding of the present study is that for 10- to 14-year-old girls, the risk for developing anorexia nervosa has increased significantly over 40 years. More healthcare facilities for younger people are needed, and prevention programs could include social media use. For bulimia nervosa, the general decrease in the occurrence of new cases has halted in the 2010s.

Three- and five-year follow-up results of a randomized controlled trial on the effects of cognitive behavioral therapy before bariatric surgery

OBJECTIVE

Up to 37% of bariatric surgery patients suffer from insufficient weight loss or weight regain and mental health symptoms in the longer term. Cognitive behavioral therapy (CBT) may be an effective adjunct intervention to optimize patients' psychological functioning and weight loss results. To examine the value of adding preoperative CBT to bariatric surgery, three- and five-year follow-up data are presented.

METHOD

In this multi-center randomized controlled trial (RCT; N = 130), a CBT group was compared to a treatment-as-usual (TAU) control group. Measurements were conducted at five time points: pretreatment (T0) and posttreatment/presurgery (T1) and at one- (T2; N = 120), three- (T3; N = 117), and five-year postsurgery (T4; N = 115). The intervention group received a 10-weeks, individual, preoperative CBT focused on self-monitoring, identifying triggers for disordered eating and goal setting for eating behavior and physical exercise, as well as postoperative lifestyle. Outcome measures included weight change, eating behavior, eating disorders, depression, quality of life (QoL), and overall psychological health.

RESULTS

Preoperative CBT was not associated with better three- and five-year results than TAU regarding weight, dysfunctional eating behaviors, eating disorders, depression, overall psychological health, and QoL.

DISCUSSION

Contrary to our hypothesis, three- and five-year postsurgery differences between groups regarding weight change and mental health were not significant.. Further exploration suggested that in both groups weight problems and depressive symptoms worsened at three and five-year follow-up. Future research should focus on long-term postoperative monitoring of weight and mood and on associated postoperative interventions and their specific timing.

PUBLIC SIGNIFICANCE

After bariatric surgery, in the longer term weight problems re-occur in 30% of patients, which is probably partly related to psychopathology. We investigated whether cognitive behavior therapy (CBT) prior to bariatric surgery improved weight maintenance and mental health after surgery. Our study provided definite proof that preoperative CBT is not effective. Long-term postoperative monitoring and prompt psychological intervention after first signs of deterioration, are important to prevent further problems.

Review of the unprecedented impact of the COVID-19 pandemic on the occurrence of eating disorders

PURPOSE OF REVIEW

To review the recent literature on the impact of the coronavirus disease-2019 (COVID-19) pandemic on incidence and severity of symptoms of eating disorders (EDs).

RECENT FINDINGS

A worrying increase of EDs in- and outpatients has been reported since the COVID-19 pandemic began in 2019/2020. Restrictions implemented during the pandemic to protect populations against COVID-19 increased the risk for onset and for worsening of EDs by disrupting eating and exercise routines, social isolation, lack of support, and limited access to healthcare. Substantial increases since the start of the pandemic have been reported for overall incidence (15%), hospital admissions (48%) and emergency department visits (11%) for EDs, with even higher increases among women and children or adolescents with an ED. During the pandemic, ED patients reported increased severity of ED-specific symptoms and increased anxiety, depression and suicidal ideations and -attempts. Treatments shifted largely toward online methods for continuity of care, despite concerns about the quality of care provided and difficulties in self-monitoring. Our review provides preliminary evidence for a similar effectiveness of online treatment to prepandemic face-to-face treatment. In-person assessment remains essential for detecting EDs and for those requiring medical admission.

SUMMARY

Although the ongoing COVID-2019 pandemic affected mental health globally, research shows that it particularly affected individuals with an ED diagnosis or at risk for an ED, especially women, children and adolescents, and those with anorexia nervosa.

Course of psychotic experiences and disorders among apprentice traditional health practitioners in rural South Africa: 3-year follow-up study

BACKGROUND

Culture is inevitably linked with the experience, interpretation and course of what modern biomedicine understands to be psychotic symptoms. However, data on psychoses in low- and middle-income countries are sparse. Our previous study showed that psychotic and mood-related experiences, symptoms and disorders are common among individuals who had received the ancestral calling to become a traditional health practitioner (THP) in rural KwaZulu-Natal, South Africa. Our related ethnographic study suggested that ukuthwasa (the training to become a THP) may positively moderate these calling-related symptoms. As far as we know, no research has been conducted into the course of psychiatric symptoms among apprentice THPs.

OBJECTIVE

We studied the course of psychotic experiences, symptoms and disorders among apprentice THPs. We also assessed their level of functioning and expanded our knowledge on ukuthwasa.

MATERIALS AND METHODS

We performed a 3-year follow-up of a baseline sample of apprentice THPs (n = 48). Psychiatric assessments (CAPE, SCAN), assessment of functioning (WHODAS) and a semi-structured qualitative questionnaire were completed for 42 individuals.

RESULTS

At 3-year follow-up, psychotic experiences were associated with significantly less distress and there was a reduction in frequency of psychotic symptoms compared to baseline. The number of participants with psychotic disorders had decreased from 7 (17%) to 4 (10%). Six out of seven participants (86%) with a psychotic disorder at baseline no longer had a psychiatric diagnosis at follow-up. Although the mean level of disability among the (apprentice) THPs corresponded with the 78th percentile found in the general population, 37 participants (88%) reported no or mild disability. Forty-one participants (98%) reported that ukuthwasa had positively influenced their psychiatric symptoms.

CONCLUSION

In rural KwaZulu-Natal, psychotic experiences, symptoms and disorders have a benign course in most individuals who are undergoing the process of becoming a THP. Ukuthwasa may be an effective, culturally sanctioned, healing intervention for some selected individuals, potentially because it reframes distressing experiences into positive and highly valued experiences, reduces stigma, and enhances social empowerment and identity construction. This implies that cultural and spiritual interventions can have a positive influence on the course of psychosis.

Incidence, prevalence and mortality of anorexia nervosa and bulimia nervosa

PURPOSE OF REVIEW

To review the recent literature on the epidemiology of anorexia nervosa and bulimia nervosa in terms of incidence, prevalence and mortality.

RECENT FINDINGS

Although the overall incidence rate of anorexia nervosa is considerably stable over the past decades, the incidence among younger persons (aged <15 years) has increased. It is unclear whether this reflects earlier detection or earlier age of onset. Nevertheless, it has implications for future research into risk factors and for prevention programs. For bulimia nervosa, there has been a decline in overall incidence rate over time. The lifetime prevalence rates of anorexia nervosa might be up to 4% among females and 0.3% among males. Regarding bulimia nervosa, up to 3% of females and more than 1% of males suffer from this disorder during their lifetime. While epidemiological studies in the past mainly focused on young females from Western countries, anorexia nervosa and bulimia nervosa are reported worldwide among males and females from all ages. Both eating disorders may carry a five or more times increased mortality risk.

SUMMARY

Anorexia nervosa and bulimia nervosa occur worldwide among females and males of all age groups and are associated with an increased mortality risk.

Risk factors in preadolescent boys and girls for the development of eating pathology in young adulthood

OBJECTIVE

Despite a growing literature on potential risk factors for eating disorders, longitudinal research starting before adolescence is scarce, and little is known about risk factors in males. We investigated risk factors in preadolescent boys and girls for the development of eating pathology in adolescence and young adulthood.

METHOD

This study is part of TRAILS (TRacking Adolescents' Individual Lives Survey), a Dutch population-based cohort study (N = 2,229) from preadolescence into adulthood. Potential risk factors were measured at age 11, based on self-report, reports of one of the parents, and records of the Preventive Child Healthcare. Variables included sociodemographic variables, pregnancy and perinatal factors, eating- and weight-related factors, psychological functioning, stressful experiences and family factors. At age 19, two-stage screening including interviews by eating disorder experts was used to examine the prevalence of eating disorders. At age 22 and 26, eating pathology was assessed by the Eating Disorder Diagnostic Scale.

RESULTS

Preadolescent anxious distress and high weight were associated with eating pathology in adolescence and young adulthood in both boys and girls. Overeating in preadolescence was found to be a prodromal symptom of eating disorders during late adolescence. No evidence was found for sex-specific risk factors.

DISCUSSION

Anxious preadolescents with high weight are at increased risk for the development of eating pathology later on. Clinicians should be aware of eating disorder symptoms - like overeating - in this high-risk group of children, and could consider an early intervention to prevent the development of full-blown eating disorders.

Cognitive Behavioral Therapy Versus Usual Care Before Bariatric Surgery: One-Year Follow-Up Results of a Randomized Controlled Trial

BACKGROUND

Although early results of bariatric surgery are beneficial for most patients, some patients regain weight later. Cognitive behavioral therapy (CBT) has been suggested as a way to improve patients' psychological health and maintaining weight loss in the longer term. The added value of preoperative CBT to bariatric surgery was examined. Pre- and posttreatment and 1-year follow-up data are presented.

METHODS

In a multi-center randomized controlled trial, CBT was compared to a treatment-as-usual (TAU) control group. Measurements were conducted pre- and posttreatment/pre-surgery (T0 and T1) and at 1-year post-surgery (T2). Patients in the intervention group received 10 individual, weekly sessions of preoperative CBT focused on modifying thoughts and behaviors regarding eating behavior, physical exercise, and postoperative life style. Outcome measures included weight change, eating behavior, eating disorders, depression, quality of life, and overall psychological health.

RESULTS

Though no significant differences between conditions were found per time point, in the CBT, condition scores on external eating, emotional eating, depressive symptoms, and psychological distress decreased significantly more over time between pre- (T0) and posttreatment (T1) pre-surgery compared to TAU. No significant time x condition differences were found at 1-year post-surgery (T2).

CONCLUSIONS

Compared to TAU, preoperative CBT showed beneficial effects on eating behavior and psychological symptoms only from pretreatment to posttreatment/pre-surgery, but not from pre-surgery to 1-year post-surgery. Preoperative CBT does not seem to contribute to better long-term outcomes post-surgery. Recent studies suggest that the optimal time to initiate psychological treatment may be early in the postoperative period, before significant weight regain has occurred.

TRIAL REGISTRATION

https://www.trialregister.nl Identifier: Trial NL3960.

Temperament in preadolescence is associated with weight and eating pathology in young adulthood

OBJECTIVE

Few longitudinal studies have investigated the role of temperament traits on weight and eating problems thus far. We investigated whether temperament in preadolescence influences body weight and the development of eating pathology in adolescence and young adulthood.

METHOD

This study used data from TRAILS (Tracking Adolescents' Individual Lives Survey), a Dutch community cohort study (N = 2,230) from preadolescence into adulthood. At age 11, the temperament dimensions negative affectivity and effortful control were measured with the Early Adolescent Temperament Questionnaire-Revised. Body mass index (BMI) was measured at all assessment waves. At age 19, the prevalence of eating disorders was investigated by two-stage screening including interviews by eating disorder experts. At age 22 and 26, the Eating Disorder Diagnostic Scale was used to assess the level of eating pathology.

RESULTS

Higher negative affectivity in preadolescence was associated with higher BMI and eating pathology in young adulthood. Lower effortful control in preadolescence was found to be a risk factor for the development of obesity in young adulthood. No association was found between effortful control in preadolescence and eating pathology in later life.

DISCUSSION

Both negative affectivity and effortful control play a role in the development of weight or eating problems during adolescence.

Proxy WHO Disability Assessment Schedule 2.0 Is Clinically Useful for Assessing Psychosocial Functioning in Severe Mental Illness

AIMS

This study explores how well the World Health Organization Disability Assessment Schedule (WHODAS 2.0) assesses problems with psychosocial functioning in patients with severe mental illness (SMI). Further, we assessed the relationships between psychosocial functioning and psychopathology, medication side effects, treatment setting, and quality of life.

METHODS

We performed an observational, cross-sectional study on the island of Curaçao to assess psychosocial functioning in 77 patients with SMI; they mainly had psychotic disorders. We interviewed their healthcare providers using the proxy version of the WHODAS 2.0. In addition, patients were examined for psychiatric symptoms, medication side effects (including drug-induced movement disorders), and quality of life. Associations were examined with Spearman's rank correlation (ρ).

RESULTS

Difficulties in psychosocial functioning were reported by patients with SMI in the WHODAS 2.0 domains of understanding and communicating [mean (M)=34.5, standard deviation (SD)=18.6), participation in society (M=25.5, SD=15.6), and getting along with people (M=24.1, SD=16.1)]. Notably, outpatients had more problems participating in society than inpatients (M=33.6, SD=18.5 versus M=23.2, SD=14.1, p=0.03). A positive correlation was observed between drug-induced parkinsonism and the WHODAS 2.0 total score (ρ =0.30; p=0.02), as well as with various subscales, getting around, and household activities.

CONCLUSION

The proxy version of the WHODAS 2.0 is clinically useful for patients with severe mental illness. The highest scores on the WHODAS 2.0 were found in domains related to interactions with other people and to participation in society. Inpatient status appeared to aid participation in society; this might be due to living in the sheltered clinic environment and its associated daily activities. We further found that drug-induced parkinsonism was associated with a broad spectrum of psychosocial disabilities.

CLINICAL TRIAL REGISTRATION

ClinicalTrials.gov, identifier: NCT02713672; retrospectively registered in February 2016.

Self-esteem and peer-perceived social status in early adolescence and prediction of eating pathology in young adulthood

OBJECTIVE

Self-esteem is implied as a factor in the development of eating disorders. In adolescence peers have an increasing influence. Support for the role of self-esteem in eating disorders is ambiguous and little is known about the influence of social status as judged by others. The present study investigates whether self-esteem and peer status in early adolescence are associated with eating pathology in young adulthood.

METHOD

This study is part of TRAILS, a longitudinal cohort study on mental health and social development from preadolescence into adulthood. At age 11, participants completed the Self-Perception Profile for Children, assessing global self-esteem and self-perceptions regarding social acceptance, physical appearance, and academic competence. At age 13, peer status among classmates was assessed regarding likeability, physical attractiveness, academic performance, and popularity in a subsample of 1,007 participants. The Eating Disorder Diagnostic Scale was administered at age 22. The present study included peer-nominated participants with completed measures of self-perception at age 11 and eating pathology at age 22 (N = 732; 57.8% female).

RESULTS

In a combined model, self-perceived physical attractiveness at age 11 and peer popularity at age 13 were inversely correlated with eating pathology at 22 years, while likeability by peers at age 13 was positively related to eating pathology.

DISCUSSION

Both self-perceptions and peer status in early adolescence are significant predictors of eating pathology in young adults. Specific measures of self-esteem and peer-perceived status may be more relevant to the prediction of eating pathology than a global measure of self-esteem.

Behavioral outcomes of picky eating in childhood: a prospective study in the general population

BACKGROUND

Picky eaters in the general population form a heterogeneous group. It is important to differentiate between children with transient picky eating (PE) and persistent PE behavior when adverse outcomes are studied. We analyzed four PE trajectories to determine the associations with child mental health prospectively.

METHODS

From a population-based cohort, 3,748 participants were assessed for PE at 1.5, 3, and 6 years of age using maternal reports. Four trajectories were defined: persistent (PE at all ages); remitting (PE before 6 years only); late-onset (PE at 6 years only); and never (no PE at any assessment). Child's problem behaviors were assessed with the Teacher's Report Form at 7 years of age. We examined associations between picky eating trajectories and emotional problems, behavioral problems and pervasive developmental problems using logistic regressions. Analyses were adjusted for child, parental, and socioeconomic confounders. We also adjusted for maternal-reported baseline problem behavior at age 1.5 years; the never picky eating group was used as reference.

RESULTS

Persisting PE predicted pervasive developmental problems at age 7 years (OR = 2.00, 95% CI: 1.10-3.63). The association remained when adjusted for baseline pervasive developmental problems at 1.5 years (OR = 1.96, 95% CI: 1.10-3.51). Persistent PE was not associated with behavioral (OR = 0.92, 95% CI: 0.53-1.60) or emotional problems (OR = 1.24, 95% CI: 0.74-2.07). Other PE trajectories were not related to child behavioral or emotional problems.

CONCLUSIONS

Persistent PE may be a symptom or sign of pervasive developmental problems, but is not predictive of other behavioral problems. Remitting PE was not associated with adverse mental health outcomes, which further indicates that it may be part of normal development.

Prevalence and severity of DSM-5 eating disorders in a community cohort of adolescents

OBJECTIVE

The fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) includes a considerably revised eating disorder section. The aim of this study was to establish the prevalence and severity of eating disorders based on the new DSM-5 criteria in a community cohort of adolescents.

METHOD

This study is part of TRAILS (TRacking Adolescents' Individual Lives Survey), a Dutch cohort study on mental health and social development from preadolescence into young adulthood. At baseline, the participants (n = 2,230) were about 11 years old. Body mass index was measured at all four assessment waves. At age 19, the Composite International Diagnostic Interview was administered to 1,584 of the participants. A two-stage screening approach was used to estimate the prevalence of DSM-5 eating disorders. Adolescents at high risk for eating disorders (n = 312) were selected for an additional interview administered by eating disorder experts.

RESULTS

Of the high-risk group n = 296 (95%) could be interviewed. Among the women, the lifetime prevalence of DSM-5 anorexia nervosa was 1.7%, of bulimia nervosa 0.8% and of binge eating disorder 2.3%. Eating disorders were relatively rare among the men. The severity of most cases was mild to moderate and detection and treatment rates depended on the level of severity.

DISCUSSION

The most common DSM-5 eating disorder diagnoses in adolescents in the community are anorexia nervosa and binge eating disorder. Severity ratings for eating disorders seem valid in terms of both the distribution in the community and the correlation with detection and treatment by health care services.

Epidemiology of eating disorders: incidence, prevalence and mortality rates

Eating disorders are relatively rare among the general population. This review discusses the literature on the incidence, prevalence and mortality rates of eating disorders. We searched online Medline/Pubmed, Embase and PsycINFO databases for articles published in English using several keyterms relating to eating disorders and epidemiology. Anorexia nervosa is relatively common among young women. While the overall incidence rate remained stable over the past decades, there has been an increase in the high risk-group of 15-19 year old girls. It is unclear whether this reflects earlier detection of anorexia nervosa cases or an earlier age at onset. The occurrence of bulimia nervosa might have decreased since the early nineties of the last century. All eating disorders have an elevated mortality risk; anorexia nervosa the most striking. Compared with the other eating disorders, binge eating disorder is more common among males and older individuals.

The incidence of anorexia nervosa in Netherlands Antilles immigrants in the Netherlands

OBJECTIVE

Previously we found that the incidence of anorexia nervosa (AN) in the general population was much lower in the Netherlands Antilles than in the Netherlands. As a follow-up we compared the incidence of AN in the Netherlands in persons from the Netherlands Antilles to native Dutch.

METHOD

A national register of psychiatric hospital admissions was screened for cases of AN. Incidence rates (IR) and incidence rate ratios (IRR) were computed.

RESULTS

The IR of AN was 1.32 per 100 000 person years (95% confidence interval (CI): 0.53-2.71) for Netherlands Antilleans and 1.09 (95% CI: 1.04-1.15) for native Dutch. The age- and sex-adjusted IRR was 1.21 (95% CI: 0.58-2.54).

CONCLUSION

Contrary to the Netherlands Antilles, in the Netherlands AN is as common among Netherlands Antilleans as among native Dutch. Exposure to the Western idealization of thinness is a risk factor for the development of AN, possibly in interaction with migration-related stress.

Course and outcome of eating disorders in a primary care-based cohort

OBJECTIVE

To study the course and outcome of patients with eating disorder detected in primary care.

METHOD

General practitioners (GP's) provided information on the course and outcome of eating disorders in patients (n = 147) diagnosed with anorexia nervosa (AN) or bulimia nervosa (BN) identified during a Dutch nationwide primary care-based incidence study. The research team determined the outcome based on the data provided by the GP's. The mean duration of the follow-up was 4.8 years.

RESULTS

About 57% of the patients initially diagnosed with AN and 61% of those diagnosed with BN were fully recovered. AN binge/purge subtype (ANBP) demonstrated the most extended median survival time of all diagnostic subgroups (the point at which half of the group has reached full recovery). Diagnostic crossover was low. A younger age at detection predicted recovery at outcome for AN and BN. One patient (AN) died.

DISCUSSION

The results of this study on differences in outcome and low crossover support the diagnostic distinction between AN and BN in the DSM-IV. Early detection is of major importance for a favorable outcome.

The validity and utility of subtyping bulimia nervosa

OBJECTIVE

To review the evidence for the validity and utility of subtyping bulimia nervosa (BN) into a purging (BN-P) and a nonpurging subtype (BN-NP), and of distinguishing BN-NP from binge eating disorder (BED), by comparing course, complications, and treatment.

METHOD

A literature search of psychiatry databases for studies published in peer-reviewed journals that used the DSM-definitions of BN and BED, and included both individuals with BN-NP and individuals with BN-P and/or BED.

RESULTS

Twenty-three studies compared individuals with BN-NP (N = 671) to individuals with BN-P (N = 1795) and/or individuals with BED (N = 1921), two of which reported on course, 12 on comorbidity and none on treatment response-the indicators for validity and clinical utility. The differences found were mainly quantitative rather than qualitative, suggesting a gradual difference in severity from BN-P (most severe) through BN-NP to BED (least severe).

DISCUSSION

None of the comparisons provided convincing evidence for the validity or utility of the BN-NP diagnosis. Three options for the position of BN-NP in DSM-V were suggested: (1) maintaining the BN-NP subtype, (2) dropping nonpurging compensatory behavior as a criterion for BN, so that individuals currently designated as having BN-NP would be designated as having BED, and (3) including BN-NP in a broad BN category.

Prevalence of treated autism spectrum disorders in Aruba

To study autism outside of a narrow range of settings previously studied, and in a particularly distinctive setting in the Caribbean. The aim of the Aruba Autism Project was to determine the prevalence of autism spectrum disorders (ASDs) in birth years 1990–1999 in Aruba. A record review study was conducted; cases were ascertained from children treated at the Child & Adolescent Psychiatry Clinic of Aruba, the first and only child psychiatry service on the island. In these 10 birth years we found a prevalence for autistic disorder (AD) of 1.9 per 1,000 (95% CI 1.2–2.8) and for autism spectrum disorders of 5.3 per 1,000 (95% CI 4.1–6.7). Comparison analysis with a cumulative incidence report from the UK, showed a similar cumulative incidence to age five in Aruba. Prevalence of ASDs in birth years 1990–1999 and cumulative incidence to age five in Aruba are similar to recent reports from the United Kingdom and the United States.

Urbanisation and the incidence of eating disorders

The link between degree of urbanisation and a number of mental disorders is well established. Schizophrenia, psychosis and depression are known to occur more frequently in urban areas. In our primary care-based study of eating disorders, the incidence of bulimia nervosa showed a dose-response relation with degree of urbanisation and was five times higher in cities than in rural areas. Remarkably, anorexia nervosa showed no association with urbanisation. We conclude that urban life is a potential environmental risk factor for bulimia nervosa but not for anorexia nervosa. These findings provide a promising avenue for further research into the aetiology of eating disorders.

Time trends in the incidence of eating disorders: a primary care study in the Netherlands

OBJECTIVE

This Dutch epidemiological study used primary care-based data to examine changes in the incidence of eating disorders in the 1990s compared to the 1980s.

METHOD

A nationwide network of general practitioners, serving a representative sample of the total Dutch population, recorded newly diagnosed patients with anorexia nervosa (AN) and bulimia nervosa (BN) in their practices during 1985-1989 and 1995-1999.

RESULTS

The overall incidence of AN was stable (from 7.4 to 7.7 per 100,000). However, the incidence among 15-19-year-old females increased significantly (from 56.4 to 109.2 per 100,000). The incidence rate of BN decreased nonsignificantly from 8.6 to 6.1 per 100,000.

CONCLUSION

The time trend of an increasing AN incidence among the high risk group continued to the end of the past century. The BN incidence did not rise as was expected.

Review of the prevalence and incidence of eating disorders

OBJECTIVE

To review the literature on the incidence and prevalence of eating disorders.

METHODS

We searched Medline using several key terms relating to epidemiology and eating disorders and we checked the reference lists of the articles that we found. Special attention has been paid to methodologic problems affecting the selection of populations under study and the identification of cases.

RESULTS

An average prevalence rate for anorexia nervosa of 0.3% was found for young females. The prevalence rates for bulimia nervosa were 1% and 0.1% for young women and young men, respectively. The estimated prevalence of binge eating disorder is at least 1%. The incidence of anorexia nervosa is 8 cases per 100,000 population per year and the incidence of bulimia nervosa is 12 cases per 100,000 population per year. The incidence of anorexia nervosa increased over the past century, until the 1970s.

DISCUSSION

Only a minority of people who meet stringent diagnostic criteria for eating disorders are seen in mental health care.