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PubMed · 7787601

Using data from the 1991 census.

F A Majeed·D G Cook·J Poloniecki·D Martin
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Abstract

The 1991 census for England and Wales provides a substantial amount of data on demography, ethnicity, housing tenure, employment status, and other social factors for geographical areas ranging in size from enumeration districts upwards. Many in the health service and in the academic community are making use of the data in the 1991 census. However, users of census data need to be aware of the problems and limitations of these data, which include the format of the data, data modification and suppression, sampling error, and underenumeration. An important innovation of the 1991 census was that the census form included a question on the postcode of respondents; this allowed the Office of Population Censuses and Surveys to produce a postcode-enumeration district look up table which overcomes many of the problems previously encountered in trying to assign postcodes to enumeration districts. The new look up table also includes the grid reference of postcodes, and this will improve the geographical referencing of census data.

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Data CollectionData Interpretation, StatisticalDemographyEnglandHumansResidence CharacteristicsWalesJournal Article

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F A Majeed, D G Cook, J Poloniecki, D Martin. 1995-06-10. Using data from the 1991 census.. https://doi.org/10.1136/bmj.310.6993.1511

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Mild forms of Guillain-Barré syndrome in an epidemiologic survey in The Netherlands.

OBJECTIVE: Assessment of incidence rates of Guillain-Barré syndrome (GBS) in the Netherlands over a 10-year period; investigation of a relationship between possible seasonality in GBS and the occurrence of preceding infections; and determination of distinctive characteristics in patients with GBS who are only mildly affected (able to walk unaided at nadir). METHOD: Records of patients with GBS admitted between 1987 and 1996 from all 45 hospitals in the southwest Netherlands were evaluated, covering a population of 4.2 million inhabitants. RESULTS: A total of 476 patients met National Institute for Neurological and Communicative Disorders and Stroke criteria for GBS. This resulted in a crude incidence rate (IR) of 1.18/100,000 inhabitants. This IR increased linearly with age (p < 0.001). Men were more frequently affected than women (p < 0.001). No seasonal preponderance for GBS, nor for any of the preceding infections, was found. Patients under 50 years of age (p < 0.001) and men (p = 0.01) were more frequently found in the mildly affected group. In both groups a preceding infection was reported in 70% of the cases. In the severely affected group, serologic evidence for infection with Campylobacter jejuni, cytomegalovirus, Epstein-Barr virus, or Mycoplasma pneumoniae was found more frequently than in the mildly affected group (41% versus 16%, p = 0.001). CONCLUSIONS: Overall IR in the Netherlands are similar to those found in other studies. The incidence increases linearly with age and men are more frequently affected than women. Distinctive characteristics for mildly and severely affected patients were found regarding age, sex, and preceding infections. This suggests that other infectious agents or host factors may be involved in mild forms of GBS.

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