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Table 1 Baseline characteristics of reviewed documents (N = 45)

From: What are the drivers of recurrent cholera transmission in Nigeria? Evidence from a scoping review

CharacteristicFrequency (%)
General characteristics
Authors’ affiliation
 Academic institution22 (48.89)
 Academic and government7 (15.56)
 Academic and hospital1 (2.22)
 Academic and International NGO1 (2.22)
 Governmental health institution12 (26.67)
 Governmental health institution and International NGO1 (2.22)
 International NGO1 (2.22)
Document type
 Conference proceeding5 (11.11)
 Peer-reviewed journal40 (88.89)
Publication period
  < 19904 (8.89)
 1990–20006 (13.33)
 2001–20106 (13.33)
 2011–201829 (64.44)
State where study was undertaken
 Akwa-Ibom and Cross-River1 (2.22)
 Bauchi1 (2.22)
 Bauchi and Gombe1 (2.22)
 Bauchi, Borno and Gombe2 (4.44)
 Bauchi, Borno and Osun1 (2.22)
 Benue1 (2.22)
 Borno2 (4.44)
 Cross-River4 (8.89)
 Jigawa2 (4.44)
 Kaduna4 (8.89)
 Kano2 (4.44)
 Katsina1 (2.22)
 Lagos2 (4.44)
 Nasarawa1 (2.22)
 Niger1 (2.22)
 Ogun1 (2.22)
 Osun2 (4.44)
 Oyo7 (15.56)
 Rivers1 (2.22)
 Multiple states (> 3 states)8 (17.78)
Study context
 Epidemic29 (64.44)
 Endemic9 (20.00)
 Endemic and epidemic6 (13.33)
 Unspecified1 (2.22)
Study approach
 Prospective18 (40.00)
 Retrospective23 (51.11)
 Prospective and retrospective3 (6.67)
 Unclear1 (2.22)
Study design
 Case-control10 (22.22)
 Cross-sectional28 (62.22)
 Review4 (8.89)
 Unspecified3 (6.67)
Median sample size reported in documents (IQR)a329 (109–1220)
Age group of study participants
 All age groups17 (37.78)
 Adults2 (4.44)
 Children under-5 years1 (2.22)
 Children under-14 years1 (2.22)
 Unspecified24 (53.33)
Funding for study
 Unspecified41 (91.11)
 Yes4 (8.89)
Ethical approval for the study
 Unspecified34 (75.56)
 Yes11 (24.44)
Clinical characteristics
Data collection approach
 Record extraction4 (8.89)
 Microbiological examination7 (15.56)
 Questionnaire9 (20.00)
 Record extraction and microbiological examination1 (2.22)
 Questionnaire and microbiological examination9 (20.00)
 Record extraction and questionnaire2 (4.44)
 Record extraction, questionnaire and microbiological examination1 (2.22)
 Record extraction, questionnaire and observation2 (4.44)
 Unspecified10 (22.22)
Report of case fatality rate (%)
 No23 (51.11)
 Yes22 (48.89)
Mean (SD) case fatality rateb6.53 (3.90)
Report of attack rate
 No40 (88.89)
 Yes5 (11.11)
Location of sample collection
 Community11 (24.44)
 IDP camp1 (2.22)
 Primary1 (2.22)
 Secondary1 (2.22)
 Tertiary4 (8.89)
 Primary and secondary1 (2.22)
 Secondary and tertiary3 (6.67)
 Tertiary and private1 (2.22)
 Unspecified health facility2 (4.44)
 Unspecified health facility and community4 (8.89)
 Unspecified health facility and IDP camp1 (2.22)
 Unspecified15 (33.33)
Culture
 No11 (24.44)
 Yes22 (48.89)
 Unspecified12 (26.67)
Rapid diagnostic test performed
 No40 (88.89)
 Yes5 (11.11)
Identified biotype
 Classical1 (2.22)
 El-Tor4 (8.89)
 Classical & El-Tor2 (4.44)
 Atypical El-Tor1 (2.22)
 Unspecified37 (82.22)
Identified serogroup
 O113 (28.89)
 Non-O12 (4.44)
 Unspecified30 (66.67)
Identified serotype
 Ogawa8 (17.78)
 Inaba1 (2.22)
 Ogawa and Inaba1 (2.22)
 Unspecified35 (77.78)
  1. a Based on 34 out of 45 documents
  2. bBased on 22 out of 45 documents