pbc {sparr}

Primary biliary cirrhosis data

Description

Data of the locations of 761 cases of primary biliary cirrhosis in several adjacent health regions of north-eastern England, along with 3020 controls representing the at-risk population, collected between 1987 and 1994. These data were first presented and analysed by Prince et al. (2001); subsequent analysis of these data in the spirit of sparr was performed in Davies and Hazelton (2010). Also included is the polygonal study region.

Format

pbc is a dichotomously marked ppp.object, with locations expressed in UK Ordnance Survey Coordinates (km).

Acknowledgements

The authors thank Prof. Peter Diggle for providing access to these data.

Source

Prince et al. (2001), The geographical distribution of primary biliary cirrhosis in a well-defined cohort, Hepatology, 34, 1083-1088.

References

Davies, T.M. and Hazelton, M.L. (2010), Adaptive kernel estimation of spatial relative risk, Statistics in Medicine, 29(23) 2423-2437.

Examples

data(pbc)
summary(pbc)
plot(pbc)