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Table 1 Methods, time, geography, and reason for choice in the analyses

From: Seasonality and the effects of weather on Campylobacter infections

Methods Time Spatial unit Reason for choice
GIS incidence mapping 2005–2014 Lower Layer Super Output Areas (LSOAs) Individual resident postcodes (required for mapping by population) were not available before 2005.
Local linkage of cases and weather 2005–2009 Laboratory postcode Local linkage of cases and weather variables through the laboratory postcode was available from 2005 to 2009 in ten geographical regions.
Comparative conditional incidence 2005–2009 LSOAs Lack of negative cases, positive cases were linked to weather variables from 2005 to 2009.
GEST model 2005–2009 Laboratory postcode Local linkage of cases and weather data through the laboratory postcode was available from 2005 to 2009 in ten geographical regions.
Wavelet analysis 1989–2009 England and Wales The cases were not linked to weather variables. Health and weather data were analysed separately.
Ward’s minimum variance clustering & GEST 1989–2009 Strategic Health Authorities postcode To increase the number of regions from ten to thirty-three sub-regions and determine the clustering of geographic similarities of the seasonality. Cases were not linked to weather variables.