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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