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W Vincent

Publications and source records attributed to W Vincent.

7 recordsLinked to original sources
PubMed1987

[Theory and practice of sampling studies: exemplified by the MONICA survey].

In parallel with the systematic registration of myocardial infarction, the MONICA-Project attempts to investigate at three different times the prevalence of risk factors for cardiovascular disease in the population. This article presents the sampling plan of the first MONICA survey in the cantons of Vaud, Fribourg and Tessin. The sampling procedure was at two levels: first, a sample of communes stratified according to community size was chosen, and secondly, within these communities, individuals were selected from the population registries. The prerequisites for an efficient sampling plan are discussed on a theoretical level. In addition, the practical constraints (budget, organizational problems, population registry files) are presented. Finally, all steps of the sampling procedure are described including the difficulties encountered. The discussion attempts a critical evaluation of the whole MONICA sampling procedure whose results are largely satisfactory.

Adult↗
PubMed1987

[The MONICA survey: analysis of participation].

Participation rates at the first (1985) MONICA survey (representative samples of the Cantons of Vaud, Fribourg and Tessin) are presented. Sample members were invited by phone or letter to the survey (physical examination, blood sample and questionnaire). Overall participation rate was 57% in the french-speaking and 78% in the italian-speaking region. Underrepresented were resident foreigners, women, non-married persons and the aged. If no phone contact was materialized, participation was low. An additional questionnaire for non-responders allows to estimate potential biases in the results of the first MONICA survey.

Adult↗
PubMed1987

[Blood lead level in Switzerland in 1985: results of the MONICA survey].

New federal regulations regarding air pollution will soon impose catalysator equipped cars and unleaded fuel. In order to evaluate whether these measures affect the blood lead content in the Swiss population, there will be lead measurements in all three MONICA sample surveys. In the first survey, based on representative population samples, blood lead level was measured in the cantons of Vaud and Fribourg. Results based on 1774 lead measurements indicate a mean blood lead level significantly higher for males than females: 0.63 and 0.44 micromol/l. Work condition as measured by socio-professional category is only related to blood lead among males, while the living environment (community size) is only associated with female blood lead levels. Workers in agriculture and inhabitants of small communes have the lowest blood lead level. In addition, alcohol and tobacco consumption show a strong direct association with blood lead levels and are the two most important potentially confounding factors regarding the relation between blood lead levels and environmental lead pollution.

Adult↗