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Fig. 2 | Global Health Research and Policy

Fig. 2

From: Determinants of patient survival during the 2014 Ebola Virus Disease outbreak in Bong County, Liberia

Fig. 2

Number of suspected, probable, or confirmed cases of EVD. After the identification of persons of interest (n = 607), suspected and probable cases were subjected to diagnostic testing with RT-PCR for EBOV when available (n = 321). For those with test results, the likelihood of being RT-PCR positive given demographic and exposure related factors was assessed using simple logistic regression (blue shaded polygon*); the 172 RT-PCR negatives were excluded from further analysis. Cases confirmed by RT-PCR (n = 149) and suspected and probable EVD cases not tested by RT-PCR (n = 286) were submitted to review of survival histories for completeness, excluding 44 that were lost to follow-up at 30 days. This left 391 suspected, probable, or confirmed EVD cases for survival analysis using Cox proportional hazards regression and Kaplan-Meier survival functions to assess the risk of short-term mortality within 30 days of symptom onset (orange shaded polygon**)

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