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Out-of-hospital cardiac arrests in Amsterdam and its surrounding areas: results from the Amsterdam resuscitation study (ARREST) in 'Utstein' style.

The purpose of this study was to describe the chain of survival in Amsterdam and its surroundings and to suggest areas for improvement. To ensure accurate data, collection was made by research personnel during the resuscitation, according to the Utstein recommendations. Between June 1, 1995 and August 1, 1997 all consecutive cardiac arrests were registered. Patient characteristics, resuscitation characteristics and time intervals were analyzed in relation to survival. From the 1046 arrests with a cardiac etiology and where resuscitation was attempted, 918 cases were not witnessed by EMS personnel. The analysis focussed on these 918 patients of whom 686 (75%) died during resuscitation, 148 (16%) died during hospital admission and 84 patients (9%) survived to hospital discharge. Patient and resuscitation characteristics associated with survival were: age, VF as initial rhythm, witnessed arrest and bystander CPR. EMS arrival time was significantly shorter for survivors (median 9 min) compared to non-survivors (median 11 min). In 151 cases the police was also alerted and arrived 5 min (median) earlier than EMS personnel. Using the OPC/CPC good functional health was observed in 50% of the survivors and moderate performance in 29%. All links in the chain of survival must be strengthened, but equipping the police with semi-automatic defibrillators may be the most useful intervention to improve survival.

Adolescent↗

Prevalence and management of hypertension among Turkish, Moroccan and native Dutch ethnic groups in Amsterdam, the Netherlands: The Amsterdam Health Monitor Survey.

OBJECTIVE: To assess ethnic differences in the prevalence and management of hypertension among Turkish, Moroccan and native Dutch ethnic groups in Amsterdam, the Netherlands. DESIGN: A cross-sectional survey. PARTICIPANTS: A random sample of 1304 adults aged 18 years and over. Of these, 39.2% were Dutch, 33.2% were Turkish and 27.6% were Moroccan. RESULTS: The prevalence of hypertension was lower in Turkish (men 25.8% and women 22.2%) and Moroccan (men 26.1% and women 19.6%) than in Dutch individuals (men 48.8% and women 35.0%). Except for Turkish women, these differences persisted after adjustment for age and body mass index: the odds ratios (95% confidence interval) for being hypertensive were 0.47 (0.30-0.74; P < 0.001) for Turkish men, 0.48 (0.30-0.76; P < 0.001) for Moroccan men and 0.51 (0.28-0.94; P = 0.03) for Moroccan women. Only Moroccan hypertensive women were less likely than Dutch women to be aware of their condition 0.31 (0.11-0.81; P < 0.01) and to be treated 0.32 (0.12-0.88; P < 0.01) for hypertension. There were no differences in hypertension control between the ethnic groups in both men and women. CONCLUSION: The lower prevalence of hypertension among Moroccan men may contribute to the low cardiovascular disease (CVD) mortality reported among this group in the Netherlands. The differential risks in CVD mortality between Moroccan men and women may partly result from the lower hypertension awareness and treatment rates in Moroccan women. Strategies aimed at improving the detection and treatment of hypertension among Moroccan women may improve the sex disparity in cardiovascular mortality between Moroccan men and women in the Netherlands.

Adolescent↗

No evidence for a sustained increase in sexually transmitted diseases among heterosexuals in Amsterdam, the Netherlands: a 12-year trend analysis at the sexually transmitted disease outpatient clinic, Amsterdam.

OBJECTIVES: Sexually transmitted diseases (STDs) are on the rise, mainly among men having sex with men (MSM). GOAL: The goal of this study was to evaluate whether STD increases as seen in MSM are also visible among heterosexuals. STUDY DESIGN: Attendees of the STD clinic in Amsterdam, The Netherlands, are routinely tested for chlamydia, gonorrhea, and syphilis. Additionally, all women are tested for trichomoniasis. STD time trends of heterosexual attendees between 1994 and 2005 were analyzed by logistic regression and generalized linear models with a negative binomial distribution. RESULTS: The number of consultations doubled since 1994. However, no long-term increase was seen in the number of syphilis and gonorrhea infections. Additionally, the trichomonas prevalence declined. However, the number of chlamydia infections increased over time. CONCLUSIONS: Although the number of attendees increased, no evidence for increasing STD incidence was found among heterosexuals. The increase in chlamydia infections can probably be explained by increased screening resulting from increased numbers of attendees.

Adult↗

B.C.P. Jansen Institute, University of Amsterdam, Amsterdam, The Netherlands.

In a patient with Fabry's disease who had undergone kidney transplantation to correct uremia, the neutral glycosphingolipids and alpha-galactosidase activity have been measured in plasma and urine and, 9 months later, after the death of the patient, in autopsy material. After transplantation, there was no significant increase in alpha-galactosidase activity in plasma; the activity found never exceeded 3% of the mean control value. A striking parallelism was found during the follow-up period in the increase and decrease of trihexosylceramide and globoside and also of glucosylceramide and dihexosylceramide. The alpha-galactosidase activity in spleen and liver was as low as that observed in untreated Fabry hemizygotes. These data and those obtained from autopsy material provide evidence that renal transplantation does not lead to a specific enzymic breakdown of trihexosylceramide in Fabry patients. However, no trihexosylceramide accumulation was observed in the transplanted kidney.

Adult↗

[Risk factors for cardiovascular diseases in Turks in Amsterdam and in Ankara].

OBJECTIVE: To determine the prevalence of the main risk factors for cardiovascular disease in Turks in Amsterdam and in Ankara, and to compare the results obtained in these two groups with each other and also with those obtained in a group of indigenous Dutch residents living in the same districts. DESIGN: Cross-sectional observational study. SETTING: Districts 'Oost' and 'De Pijp' in Amsterdam, the Netherlands, 'Camlik' and 'Beşikkaya' in Ankara, Turkey. METHODS: Plasma glucose and lipids were determined in 149 Turkish residents living in Amsterdam and 145 Turkish subjects in Ankara with comparable socio-economic status (66 and 74% of those who were asked to participate). Blood pressure was also measured by mercury sphygmomanometry. Questionnaires were completed on smoking habits, alcohol consumption, physical activity, consumption of food containing saturated fat, and the existence of heart and vascular disease or hypertension. Results were compared between groups and also with the findings obtained in a group of indigenous Dutch subjects living in the same districts in Amsterdam by the Peilstationsproject of the Rijksinstituut voor Volksgezondheid en Milieu (Sounding station project, National Institute for Public Health and the Environment). RESULTS: Turkish men in Amsterdam had higher systolic blood pressures, lower HDL cholesterol values and higher total cholesterol/HDL cholesterol ratios, and were more obese than men in Ankara and Dutch men in Amsterdam. Glucose concentration and total cholesterol and LDL cholesterol concentrations of Turkish men in Amsterdam were higher than the values of men in Ankara. The risk profile of Turkish women was also more unfavourable compared with that of women in Ankara, but the differences were less than in the men. They had lower HDL cholesterol values, higher LDL cholesterol and glucose and smoked more often than women in Ankara. Turkish women in Amsterdam also had higher systolic and diastolic blood pressures and were more obese than Dutch women in Amsterdam. CONCLUSION: Turkish residents in Amsterdam have more risk factors for cardiovascular disease than their countrymen living in Ankara, and also compared with indigenous Dutch citizens living in the same districts. Their risk factor profile, therefore, is not intermediary between that of Turkish subjects in Ankara and the indigenous Dutch citizens, as might be expected in view of the mortality figures.

Adolescent↗

Suspected HNPCC and Amsterdam criteria II: evaluation of mutation detection rate, an international collaborative study.

BACKGROUND AND AIMS: The Korean Hereditary Tumor Registry has proposed criteria for suspected hereditary nonpolyposis colorectal cancer (S-HNPCC criteria I and II) and confirmed their validity in an international collaborative study. The S-HNPCC criteria included families that did not fulfill the Amsterdam criteria, but in whom HNPCC was nevertheless strongly suspected. The S-HNPCC criteria was also revised accordingly since some S-HNPCC families now fullfil the revised Amsterdam criteria. The original Amsterdam criteria have recently been revised, including some extracolonic cancers. This study compared the mutation detection rates between the revised and previous Amsterdam and S-HNPCC criteria. PATIENTS AND METHODS: Data on the mutational status of 393 HNPCC suspected families were collected from ten different institutes. Two hundred families were categorized into old S-HNPCC criteria (142 into criteria I and 58 into criteria II) and 193 families into Amsterdam criteria I. RESULTS: Of the 142 old S-HNPCC criteria I families 24 fulfilled the Amsterdam criteria II as the data were reclassified according to the revised criteria, increasing the proportion of the families fulfilling the Amsterdam criteria by 12.4%. The mutation detection rate of the revised criteria was very little changed compared to the old criteria; 26% and 27% in the S-HNPCC criteria, and 50% and 52% in the Amsterdam criteria. CONCLUSION: The mutation detection rate is hardly affected by the revision of the Amsterdam criteria although the population of patients fulfilling the criteria is increased. The value of revised S-HNPCC criteria is equivalent to that of as the old S-HNPCC criteria in selecting of candidate patients for genetic testing.

Adaptor Proteins, Signal Transducing↗

Frequency of the Amsterdam criteria in a regional German cohort of patients with colorectal cancer.

Estimates of the colon cancer burden associated with hereditary nonpolyposis colorectal cancer (HNPCC) vary from less than 1 % to more than 5 %. Amsterdam criteria fulfilled within a kindred (classic Amsterdam and Amsterdam II criteria) are widely used to identify patients prone to HNPCC. The present study was initiated to assess the frequency of the Amsterdam criteria within a regional German cohort of 207 patients with a history of colorectal cancer (CRC). Data on individual and family cancer histories were available in 154 patients (73 women, 81 men; mean age at diagnosis 62.4 +/- 13.3 years). A total of 843 first degree relatives have been identified within the kindreds of whom 121 had verified cancers. In 28 of 154 families (18 %), at least one first degree relative of the index patient had CRC. With respect to a typical family history, five kindreds (3.2 %) were likely to suffer from HNPCC on a clinical basis (4 kindreds met the classic Amsterdam criteria and one kindred the Amsterdam II criteria). Testing for microsatellite instability could additionally be performed in 4 of 5 patients who met the Amsterdam criteria and revealed DNA instability in 3 cases. Moreover, a missense mutation of MSH2 (Gly965Asp) was detected in one patient with microsatellite instability. Based on the classic Amsterdam and Amsterdam II criteria approximately 3 % of a regional German cohort of patients with CRC are likely to suffer from HNPCC. However, the final diagnosis of HNPCC can only be established by detection of pathogenic germline mutations within the DNA mismatch repair genes.

Adult↗

Local health systems in 21st century: who cares?-An exploratory study on health system governance in Amsterdam.

BACKGROUND: There is a growing awareness that there should be a public health perspective to health system governance. Its intrinsic population health orientation provides the ultimate ground for determining the health needs and governing collaborative care arrangements within which these needs can be met. Notwithstanding differences across countries, population health concerns are not central to European health reforms. Governments currently withdraw leaving governance roles to care providers and/or financiers. Thereby, incentives that trigger the uptake of a public health perspective are often ignored. METHODS: In this study we addressed this issue in the city of Amsterdam. Using a qualitative study design, we explored whether there is a public health perspective to the governance practices of the municipality and the major sickness fund in Amsterdam. And if so, what the scope of this perspective is. And if not, why not. RESULTS: Findings indicate that the municipality has a public health perspective to local health system governance, but its scope is limited. The municipality facilitates rather than governs health care provision in Amsterdam. Furthermore, the sickness fund runs major financial risks when adapting a public health perspective. It covers an insured population that partly overlaps the Amsterdam population. Returns on investments in population health are therefore uncertain, as competitors would also profit from the sickness fund's investments. CONCLUSION: The local health system in Amsterdam is not consistently aligned to the health needs of the Amsterdam population. The Amsterdam case is not unique and general consequences for local health system governance are discussed.

Cities↗

Similarities and differences in homelessness in Amsterdam and New York City.

Differences and similarities in homelessness in Amsterdam and New York City were examined, particularly in regard to persons most at risk for homelessness--those with mental illness and with substance abuse problems. The Netherlands is a welfare state where rents are controlled by the national government and more than half of the housing is public housing. Virtually all homeless people in Amsterdam are unemployed and receive some sort of social security benefit. Direct comparisons of the results of American and Dutch studies on homelessness are impossible, mainly because the estimates are uncertain. Because of the Dutch welfare system, Amsterdam has a smaller proportion of homeless people than New York City, although more people are homeless in Amsterdam today than 15 years ago. Neither a lack of affordable housing or sufficient income nor unemployment has been a direct cause of the increase of homelessness. As in New York City, many of the homeless in Amsterdam are mentally ill or have substance use disorders. The increase in the number of homeless people in Amsterdam consists largely of mentally ill people who would have been admitted to a mental hospital 20 years ago and of older, long-term heroin abusers who can no longer live independently. Thus institutional factors such as fragmentation of services and lack of community programs for difficult-to-serve people are a likely explanation of the growing number of homeless people in Amsterdam.

Adult↗

[Identification of 2 families with hereditary nonpolyposis colonic cancer (HNPCC) and the Amsterdam criteria. Relevance of the genealogic tree and follow-up].

Hereditary nonpolyposis colorectal cancer (HNPCC) diagnosis is based either on the so-called "Amsterdam 1 criteria" or "Amsterdam 2 criteria", which includes extracolonic neoplasms associated with Lynch II syndrome. Many families are suspected of having a hereditary predisposition to cancer and may benefit from close surveillance. We describe a family (family 1) with suspected HNPCC at the beginning who fulfilled the Amsterdam 1 criteria over the course of its follow-up. We also describe an Amsterdam 2 family (family 2) with a very young affected individual. Both of them received genetic counseling and screening recommendations. A total colonoscopy was done to an asymptomatic member of family 1 and he was diagnosed with an early-stage colon cancer. He underwent subtotal colectomy because of the high risk of metachronous lesion. Screening recommendations must be the same in Amsterdam 2 families as in Amsterdam 1. Both families show the importance of considering the family history when hereditary criteria are suspected.

Adenocarcinoma↗

Prediction of the outcome of genetic testing in HNPCC kindreds using the revised Amsterdam criteria and immunohistochemistry.

BACKGROUND AND AIMS: Hereditary non-polyposis colorectal cancer (HNPCC) may be caused by mutations in the mismatch repair (MMR) genes MLH1, MSH2 or MSH6. Family history (Amsterdam criteria) has traditionally been used to select patients for mutation testing. It has been demonstrated that germline mutations in the MMR genes are associated with lack of the corresponding gene product as assessed with immunohistochemistry (IHC) in tumour specimens. The aim of the study was to assess the value of the Amsterdam criteria II and IHC in predicting germline mutations. METHODS: Fifty-six families that were previously tested for MLH1, MSH2 and MSH6 mutations were selected for this study. All pedigrees were extended and verified and the families were scored according to the original (I) and the revised Amsterdam criteria (II). The probabilities for MLH1 and MSH2 mutations were calculated by logistic regression. In addition, all available tumour material from indexed family members was examined by IHC for the presence of the three gene products. RESULTS: Three out of seven (39%) families where the mutation could be identified complied with the Amsterdam criteria I, while all seven (100%) met the Amsterdam criteria II. All families carrying a MLH1 or MSH2 mutation had > 15% calculated probability of finding a mutation. Tumours from all seven mutation carriers lacked the immunohistochemical expression of the corresponding MMR gene. CONCLUSION: The results indicate that the Amsterdam criteria II in combination with immunohistochemistry of the mismatch repair proteins in tumours may be a cost-effective approach to select families for mutation analysis.

Adaptor Proteins, Signal Transducing↗

Hb Amsterdam [alpha32(B13)Met--Ile (alpha2)]: a new unstable variant associated with an alpha-thalassemia phenotype and a new African polymorphism.

We have characterized a new abnormal hemoglobin (Hb) at position 32 of the alpha-globin chain. The proband, a 38-year-old woman of Surinamese Black ancestry, was referred to the Academic Hospital in Amsterdam, The Netherlands, after 3 years of Prednisone treatment in Surinam. Kidney failure was diagnosed at the Nephrology Department, Free University Medical Center, Amsterdam, The Netherlands; the cortisone treatment was interrupted and dialysis was started. At this stage, a microcytic hypochromic anemia was observed with high reticulocyte (40%) and ferritin (500 microg/L) levels, and hemoglobinopathy was suspected. No abnormal bands were visible on alkaline electrophoresis and high performance liquid chromatography (HPLC). The Hb A2 level was normal (2.7%) and the erythrocyte count was low (3.59 x 10(12)/L) with a normal haptoglobin level (68 mg/100 mL). None of the common alpha-thalassemia (thal) deletion defects were present. The beta-globin gene sequence was normal but the alpha2-globin gene sequence revealed an ATG-->ATA transition at codon 32, changing the methionine into an isoleucine residue. The mutation, called Hb Amsterdam, was observed in the mother of the proband, who was also heterozygous for the--alpha3.7-thal deletion and affected by a moderate microcytic hypochromic anemia. Both Hb Amsterdam and the--alpha(-3.7) allele were found in association with a new polymorphism, IVS-I-39 (C-->T), previously observed in our laboratory in seven patients of African origin, on both the alpha1 and alpha2 genes. In addition, Hb Amsterdam was also associated with the common African alpha2 polymorphism (G-->CTCGGCCC at position 7238 and T-->G at position 7174). Hb Amsterdam is the first mutation ever described at codon alpha32, a position involved in alpha1/beta1 interaction. The possibility of a contribution of this mutation to the nephropatic state of the proband is discussed.

Adult↗

Refining the Amsterdam Criteria and Bethesda Guidelines: testing algorithms for the prediction of mismatch repair mutation status in the familial cancer clinic.

PURPOSE: Hereditary nonpolyposis colon cancer (HNPCC) is a Mendelian dominant syndrome of bowel, endometrial, and other cancers and results from germline mutations in mismatch repair (MMR) genes. HNPCC is now best diagnosed on molecular grounds using MMR mutation screening, aided by microsatellite instability (MSI) and immunohistochemistry in tumors. Selection of families for molecular investigation of HNPCC is usually based on suboptimal methods (Amsterdam Criteria or Bethesda Guidelines), but these can be improved using additional clinical data (mean ages of affected persons and presence of endometrial cancer) in a quantitative model. METHODS: We have verified the performance of the Wijnen model and have shown that it remains valid when HNPCC is diagnosed using mutation screening, MSI, and immunohistochemistry. We have also set up and verified our own models (Amsterdam-plus and Alternative), which perform at least as well as the Wijnen model. RESULTS: The Amsterdam-plus model improves on the Amsterdam Criteria by using five extra variables (numbers of colorectal and endometrial cancers in the family, number of patients with five or more adenomas, number with more than one primary cancer of the colorectum or endometrium, and mean age of presentation) and performs better than the Wijnen model. The Alternative model avoids the need to evaluate the Amsterdam Criteria and performs nearly as well as the other models. CONCLUSION: We believe that a quantitative model, such as the Amsterdam-plus model, should be the first choice for selecting families or patients for evaluation of HNPCC using molecular tests. We present an algorithm for this process.

Adult↗

[The work load of family physicians in deprived neighborhoods in Amsterdam: do their patients com more often?].

OBJECTIVE: To determine whether residents from deprived Amsterdam neighbourhoods report more contacts with their general practitioner (GP) than other residents. DESIGN: Face-to-face health interview survey. SETTING: Amsterdam. METHODS: Data on two previous months' contacts with GPs and on background characteristics came from a survey among Amsterdam residents aged 16 years and above (n = 5,121; response: 61.4%). Deprived neighbourhoods were defined as having low mean incomes and high unemployment rates. RESULTS: Residents with a private health insurance from deprived neighbourhoods contacted their GPs significantly less frequently. The contact frequency of persons with compulsory health insurance depended on the definition of deprived neighbourhood: with the preferred definition they contacted their GPs more frequently (0.31/year, 0.49 adjusted for age and gender). This higher contact rate was partially connected with family composition, country of birth, occupational status and chronic psychiatric complaints. CONCLUSION: Quantitatively, residents from deprived Amsterdam neighbourhoods contribute relatively little to the higher workload of Amsterdam GPs; this study gave no information on qualitative aspects. However, Amsterdam residents with compulsory health insurance appeared to visit their GPs more frequently than the Dutch average, and those from deprived neighbourhoods even 9% more.

Adolescent↗