Biomedical subjects

H Heijnen

Publications and source records attributed to H Heijnen.

3 recordsLinked to original sources

PubMed1997

Social deprivation and psychiatric admission rates in Amsterdam.

The main subject of this study was the link between social indicators and the (re)admission rates for, and length of stay in, in-patient mental health care in Amsterdam. In a factor analysis of 15 sociodemographic variables, two principal components analysis factors were distinguished: housing quality and socioeconomic deprivation. The census variables and the factors almost all had high correlations with the crude admission rates as well as the rates standardised for age and sex. In general, the correlations with rates that were also standardised for marital status were significantly lower. This shows that many correlations between indicators and crude rates are determined to a significant extent by the marital status profile of an area. Socioeconomic deprivation is positively correlated with the proportion of readmissions and inversely correlated with average length of stay.

Adolescent↗

PubMed1996

[Psychiatric admissions in Amsterdam according to ethnic background and diagnosis].

OBJECTIVE: To determine whether patients from ethnic groups in Amsterdam are admitted to psychiatric institutes more often than Dutch natives. DESIGN: Descriptive. SETTING: Amsterdam, The Netherlands METHOD: Admission incidences were calculated from the Amsterdam registry of admissions to psychiatric institutions, 1992-1993, and the country of birth was determined. Only first-generation migrants were studied. RESULTS: Patients from most ethnic groups were not admitted more frequently than Dutch natives. Only people from non-industrialized countries were more often admitted. Schizophrenia was diagnosed significantly more often in Surinam men (a factor 2) than in Dutch natives, among Turkish men the diagnosis was less frequent. CONCLUSION: Earlier findings of two-to-five-fold increased incidence of schizophrenia in first-generation migrants from Surinam, The Netherlands Antilles and Morocco, were in Amsterdam only partly confirmed.

Adolescent↗

PubMed1977

Phenidone-ascorbic acid development in electronmicroscopic autoradiography.

Phenidone-ascorbic acid development in electronmicroscopic autoradiography, using Ilford L4 as photographic emulsion and microdol-x as reference developer. Grain yield and efficiency were studied on pale gold section of uniformly labeled tritium methacrylate. For determination of the resolution, a radioactive line source was prepared by cross-sectioning of an epon-embedded film of tritium labeled albumin. The spatial relationship between silver grains and silver bromide crystals was investigated by shadowing the emulsion with platinumcarbon before development. In shadowed autoradiographs both, silver grains and silver bromide crystal were visible. Phenidone was about twice as sensitive as microdol-x and had a half distance value (Salpeter et al., 1969) of 175 mm. Most of the silver grains of both developers were located within the perimeters of their parent silver bromide crystals. In the case of phenidone more than 80% of the excited crystals gave rise to just one silver deposit. These parameters, together with grain size and shape, and counting feasibility make phenidone a useful developer for quantitative EM-autoradiography.

Albumins↗