Hospital Catchment Area

Eighty percent of both cholera and noncholera patients with diarrhea came from a distance of up to 50 km (median, 12.2 km; interquartile range [IQR], 4.9–34 km) of their homes for seeking treatment at a surveillance hospital. However, 55% of severe cholera cases (defined by dehydration status) traveled from within a 50-km distance of the hospital facility for treatment (median, 26.1 km; IQR, 9.3–251 km). Approximately 70% of noncholera patients with severe diarrhea also traveled within 50 km of a hospital site (median, 18.8 km; IQR, 9.3–251 km) (Supplementary Figure 1).