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Economies were ordered according to their Gross National Income (GNI) per capita for the data collection year used, according to the World Bank Atlas Methods [28] and grouped into four categories: low-income (US$9355 or less); lower middle-income (US$936 $3,7055); upper middle-income (US$3,706 $11,4555); and high income (US$11,4566 or more).
Study participants were recruited consecutively throughout all the seasons of the data collection year.
T-tests and chi-square tests were used to test for data collection year and sex differences.
In all these registers the total population residing in Finland at the end of data collection year served as the universe.
(2) Graphs showing the age sex profile of mortality rates, out-migration rates, and in-migration rates, from onset of data collection to the most recent data collection year.
Because data collection for each Health Survey is carried out over the whole year and part of the following year, we averaged the exposure estimate for each participant for each pollutant for the data collection year and the previous year, although, as we did not have pollution data for 1993, for 1994 we used annual averages for 1994 only.
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Demographic factors were age at data collection (years), sex and an indicator of socio-economic status (SES).
Half of the subjects fulfilled at least one of these criteria in all three data collection years (n = 209).
Because the total number of framings of cycling and cyclists within articles was greater than the number of articles, the analysis of the frequency and proportion of different framings was undertaken separately for each of the five data collection years.
While these figures show that the majority of studies since 2007 have used the WHO VA instrument and adaptations, it is difficult to assess the level of uptake of the WHO VA standards, as trends in more recent data collection years may be difficult to interpret due to delays in publication of results, particularly given delays in PCVA interpretation in some sites.
In the follow-up data collection at year 1 and year 2 we reduced the length of the baseline questionnaire in order to promote response.
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