Successful Implementation of a Multicountry Clinical Surveillance and Data Collection System for Ebola Virus Disease in West Africa: Findings and Lessons Learned.
The 2014 outbreak of Ebola virus disease (EVD) in West Africa was the largest ever recorded. Starting in September 2014, International Medical Corps (IMC) managed 5 Ebola treatment units (ETUs) in Liberia and Sierra Leone, which cumulatively cared for about 2,500 patients. We conducted a retrospective cohort study of patient data collected at the 5 ETUs over 1 year of operations.



To collect clinical and epidemiological data from the patient care areas, each chart was either manually copied across the fence between the high-risk zone and low-risk zone, imaged across the fence, or imaged in the high-risk zone. Each ETU's data were entered into a separate electronic database, and these were later combined into a single relational database. Lot quality assurance sampling was used to ensure data quality, with reentry of data with high error rates from imaged records.



The IMC database contains records on 2,768 patient presentations, including 2,351 patient admissions with full follow-up data. Of the patients admitted, 470 (20.0%) tested positive for EVD, with an overall case fatality ratio (CFR) of 57.0% for EVD-positive patients and 8.1% for EVD-negative patients. Although more men were admitted than women (53.4% vs. 46.6%), a larger proportion of women were diagnosed EVD positive (25.6% vs. 15.2%). Diarrhea, red eyes, contact with an ill person, and funeral attendance were significantly more common in patients with EVD than in those with other diagnoses. Among EVD-positive patients, age was a significant predictor of mortality: the highest CFRs were among children under 5 (89.1%) and adults over 55 (71.4%).



While several prior reports have documented the experiences of individual ETUs, this study is the first to present data from multiple ETUs across 2 countries run by the same organization with similar clinical protocols. Our experience demonstrates that even in austere settings under difficult conditions, it is possible for humanitarian organizations to collect high-quality clinical and epidemiologic data during a major infectious disease outbreak.
International Medical Corps, Los Angeles, CA, USA.
Reshma
R
Roshania
International Medical Corps, Los Angeles, CA, USA.
Michaela
M
Mallow
Ministry of Health, Monrovia, Liberia.
Nelson
N
Dunbar
International Medical Corps Sierra Leone, Freetown, Sierra Leone.
David
D
Mansary
International Medical Corps, Los Angeles, CA, USA.
Pranav
P
Shetty
International Medical Corps, Los Angeles, CA, USA.
Taralyn
T
Lyon
International Medical Corps, Los Angeles, CA, USA.
Kacey
K
Pham
International Medical Corps, Los Angeles, CA, USA.
Matthew
M
Abad
International Medical Corps, Los Angeles, CA, USA.
Erin
E
Shedd
International Medical Corps, Los Angeles, CA, USA.
Anh-Minh A
AM
Tran
International Medical Corps, Los Angeles, CA, USA.
Sarah
S
Cundy
International Medical Corps, Los Angeles, CA, USA The Warren Alpert Medical School of Brown University, Providence, RI, USA adam_levine@brown.edu.
Adam C
AC
Levine
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D003625:Data Collection / Q000379:methods*; D016208:Databases, Factual; D003967:Diarrhea / Q000209:etiology; D004196:Disease Outbreaks; D029043:Ebolavirus; D005260:Female; D005655:Funeral Rites; D006268:Health Facilities; D019142:Hemorrhagic Fever, Ebola / Q000150:complications / Q000453:epidemiology* / Q000401:mortality / Q000821:virology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007988:Liberia / Q000453:epidemiology; D055810:Lot Quality Assurance Sampling; D008297:Male; D008875:Middle Aged; D011159:Population Surveillance; D012189:Retrospective Studies; D012807:Sierra Leone / Q000453:epidemiology; D055815:Young Adult
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