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. |