Validation of three geolocation strategies for health-facility attendees for research and public health surveillance in a rural setting in western Kenya

STRESMAN, G. H.; STEVENSON, J. C.; OWAGA, C.; MARUBE, E.; ANYANGO, C.; DRAKELEY, C.; BOUSEMA, T.; COX, J.

Next, 77·1% (95% CI 74·1-80·0) and 78·1% (95% CI 73·8-82·1) of participants were located to the correct health facility and school catchments, respectively, using the cost-distance catchment area. The combined responses were able to locate individuals based on the combination of responses with 72·4% (95% CI 67·8-76·8) of compounds successfully located to a mean area of 3·7 km 2 (table 2). Of those individuals who did not reside in the catchment area of the reported nearest landmark, the mean distance away from the edge of the catchment area was 1252 m (IQR 261-1899 m) for catchments based on Euclidian distance and 496 m (IQR 174-605 m) using the cost-distance model.