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Table 2 Baseline characteristics of cases during the 2018 cholera outbreak in Nigeria (N = 43,996)

From: Descriptive epidemiology of cholera outbreak in Nigeria, January–November, 2018: implications for the global roadmap strategy

Baseline characteristic Frequency (%)
Sociodemographic characteristic
 Sex
  Female 22,322 (50.74)
  Male 21,674 (49.26)
 Median (IQR) age, yearsa 14 (5–30)
 Age, years
   < 2 2602 (5.91)
  2–4 7651 (17.39)
  5–10 8068 (18.34)
  10–14 3300 (7.50)
   > 15 21,014 (47.76)
  Missing 1361 (3.09)
 Geopolitical zone
  South-east 205 (0.47)
  North-central 1335 (3.03)
  North-west 19,850 (45.12)
  North-east 22,606 (51.38)
 Epidemiological wave
  First wave (week 1–9 of 2018) 1119 (2.54)
  Second wave (week 10–28 of 2018) 17,528 (39.84)
  Third wave (week 29–34 of 2018) 7454 (16.94)
  Fourth wave (week 35–47 of 2018) 17,895 (40.67)
 Season
  Dry 2427 (5.52)
  Rainy 41,569 (94.48)
 Outbreak setting
  Rural 15,501 (35.23)
  Peri-urban 5941 (13.50)
  Urban 22,077 (50.18)
  Missing 477 (1.08)
Clinical characteristic
 Time to healthcare seeking
  Same day 27,470 (62.44)
  1–2 days 10,159 (23.09)
   > 2 days 1695 (3.85)
  Missing 4672 (10.62)
 Location healthcare was sought
  Primary healthcare centre 8464 (19.24)
  Secondary hospital 6294 (14.31)
  Tertiary hospital 58 (0.13)
  Private clinic 143 (0.33)
  Cholera treatment centre (including IDP camps) 730 (1.66)
  Home 9 (0.02)
  Missing 28,298 (64.32)
 Hospitalisation
  No 6096 (13.86)
  Yes 20,224 (45.97)
  Missing 17,676 (40.18)
 Stool sample collected for microbial test
  No 21,597 (49.09)
  Yes 1139 (2.59)
  Missing 21,260 (48.32)
 Stool sample tested for V. cholerae
  No 42,928 (97.57)
  Yes 1068 (2.43)
 Rapid diagnostic test outcome
  Negative 205 (0.47)
  Positive 888 (2.02)
  Pending 3 (0.01)
  Unknown 42,900 (97.51)
 Culture outcome
  Negative 41 (0.09)
  Positive 92 (0.21)
  Pending 4 (0.01)
  Unknown 43,859 (99.69)
 Clinical outcome
  Alive 43,160 (98.10)
  Died 836 (1.90)
  1. aIQR Interquartile range