Sentence examples for areas of cases from inspiring English sources

The practically complete participation rate and the comparable catchment areas of cases and controls contributed to reduce any potential selection bias.

As for other possible sources of bias, the catchment areas of cases and controls were comparable, and participation was almost complete, since less than 5% of cases and controls refused the interview.

Among the strengths of our study are the large data set, the similar catchment areas of cases and controls and the satisfactory validity and reproducibility of information collected on dietary habits (Franceschi et al, 1993, 1995; Decarli et al, 1996).

Sarkosyl-insoluble material was prepared as described (Goedert et al., 1992) from brain areas of cases number 2 (11 areas), number 5 (nine areas), number 14 (eight areas), number 17 (nine areas), number 20 (nine areas) and number 21 (eight areas).

However, two types of PrPres have been detected separately in some brain areas of cases of sporadic Creutzfeldt-Jakob disease (CJD) [ 33- 36], which were associated with different immunohistochemical features (diffuse PrPSc deposits or plaques) that may result in different digestion properties with proteinase K [ 36].

The number of journeys to malarious countries from the UK increased markedly (from 593 000 visits in 1987 to 2.6 million visits in 2004), but the median duration of visits to malarious areas of cases decreased (1987-91, 42 days; 1992-6, 35 days; 1997-2001, 28 days; 2002-6, 28 days).

Fecal specimens were collected from captured animals and from food storage and preparation areas of case and neighboring households.

EIRA controls have been randomly selected to represent the population in the areas of case recruitment and to match the cases by sex, age and area of residence.

In support of lack of population stratification artefacts is that controls were drawn from the same residential area of cases and therefore we would expect that admixture in the two groups is similar.

However, case reports from regions remote from the core area of cases indicate that the disease is spreading.

Other factors which could have led to misleading study results include selection of study areas, ascertainment of cases, population selected for the denominator, migration, classification of exposure and blinding of investigators to the fluoridation status of cases.