Fig. 3

Sub-location HIV testing uptake overlaid with clusters of new HIV diagnoses, Siaya County. A standard Geographical Information System (GIS) program, Quantum GIS version 3.6 (http://qgis.org) was used to map HIV testing uptake, and overlay sub-location clusters of new HIV diagnoses. The sub-location HIV testing uptake is in quantiles. The clusters of new HIV diagnoses were detected using the Kulldorff’s spatial scan statistic, implemented using SaTScan™ version 9.6 (http://www.satscan.org). Shown in red circles are sub-location clusters of higher new HIV diagnoses with a relative risk of > 1.0 at p value< 0.05, and in blue circles sub-location clusters of lower new HIV diagnoses with a relative risk of < 1.0 at p value< 0.05. The boundary information for sub-locations in Siaya was obtained as shapefiles from DIVA-GIS (https://www.diva-gis.org/gdata)