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Table 4 Summary statistics of variables in 447 neighbourhoods in Berlin

From: Ecological analysis of social risk factors for Rotavirus infections in Berlin, Germany, 2007–2009

Variable Median value Interquartile range Full definition
Unemployment1 8 6-12 Proportion of unemployed persons in percent of inhabitants between 15 and 65 years of age. Source: Senate of Berlin's Department for Urban Development. The unemployment rate is highly correlated to other job market related variables. Key variable for the economic status of the inhabitants in the respective neighbourhood. Query date: 31 December, 2008
Migration volume1 26 21-31 Sum of all moving to and away from the neighbourhood in percent of inhabitants in the year 2008. Key variable for the dynamic and extent of environmental changes in the area (i.e. gentrification). Source: Senate of Berlin's Department for Urban Development. Query date: 31 December, 2008
Foreign residents1 10 6-17 Proportion of foreign residents to all inhabitants. Source: Senate of Berlin's Department for Urban Development. Query date: 31 December, 2008
Population density2 97 44-173 Population density defined as number of inhabitants per hectare settlement area of the neighbourhood. This is a possible proxy for the average frequency of social contact in the respective neighbourhood. Source: Senate of Berlin's Department for Urban Development. Query date: 31 December, 2008
Basic residential quality1 27 0-96 Basic residential quality defined as the proportion of the lowest residential quality class on all three quality classes of the Berlin rent index in the year 2007. Source: Senate of Berlin's Department for Health, Environment and Consumer Protection
Infants1 3 8-4 Proportion of inhabitants < 4 years in relation to all inhabitants in the neighbourhoods in percent.
Day care attendance (<1 year)1 1 0-3 Proportion of children attending day care centres to all children in the age groups: <1 year; 1 - <2 years; 2 - <3 years and 3 - <4 years. Source: Senate of Berlin's Department for Education, Science and Research. Query date: 31 December, 2009
Day care attendance (1 - <2 years)1 39 29-55  
Day care attendance (2 - <3 years)1 73 62-83  
Day care attendance (3 - <4 years)1 89 82-99  
  1. 1 percent, 2 number of inhabitants, 3 number of cases.