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Table 2 Comparison of PWE from the previous and the current surveys in Bilomo and Kelleng

From: Epidemiology of onchocerciasis-associated epilepsy in the Mbam and Sanaga river valleys of Cameroon: impact of more than 13 years of ivermectin

 

Bilomo

Kelleng

1998

2017

P-value

2004

2018

P-value

Gender of PWE

 Male: n (%)

51 (54.8%)

27 (44.3%)

0.199

10 (52.6%)

8 (50.0%)

0.877

 Female: n (%)

42 (45.2%)

34 (55.7%)

9 (47.4%)

8 (50.0%)

Total: n (%)

93 (100%)

61 (100%)

 

19 (100%)

16 (100%)

 

Age distribution of PWE: n (%)

 0–9 years

3 (3.2%)

1 (1.6%)

< 0.001

0 (0%)

0 (0%)

0.530

 10–19 years

56 (60.2%)

12 (19.7%)

6 (31.6%)

2 (12.5%)

 20–29 years

28 (30.1%)

29 (47.5%)

8 (42.1%)

7 (43.8%)

 30–39 years

6 (6.5%)

15 (24.6%)

4 (21.0%)

4 (25.0%)

 40–49 years

0 (0%)

3 (4.9%)

1 (5.3%)

2 (12.5%)

 ≥50 years

0 (0%)

1 (1.6%)

0 (0%)

1 (6.2%)

Total

93 (100%)

61 (100%)

 

19 (100%)

16 (100%)

 

Mean age of PWE ± SD years

18.2 ± 5.7

24.9 ± 8.1

P < 0.0001

NA

31.4 ± 15.4

NA

Age-specific prevalence: n (%)

 0–9 years

3 (0.5%)

1 (0.2%)

< 0.001

0 (0.0%)

0 (0.0%)

0.676

 10–19 years

56 (12.9%)

12 (4.0%)

6 (26.1%)

2 (4.7%)

 20–29 years

28 (11.5%)

29 (17.1%)

8 (30.8%)

7 (30.4%)

 30–39 years

6 (2.6%)

15 (9.4%)

4 (14.8%)

4 (16.7%)

 40–49 years

0 (0.0%)

3 (3.5%)

1 (5.0%)

2 (11.8%)

 ≥50 years

0 (0.0%)

1 (0.5%)

0 (0.0%)

1 (2.4%)

Overall crude prevalence (%)

93/1898 (4.9%)

61/1321 (4.6%)

0.695

19/181 (10.5%)

16/204 (7.8%)

0.357

Age and sex standardized prevalence rate

NA

5.4%

NA

13.5%

9.3%

< 0.001

Age of onset of first seizure: n (%)

Mean age at onset ± SD years

12.7 ± 5.97

12.6 ± 4.1

0.909

14.7 ± 6.5

14.1 ± 7.7

0.804

 0–2 years

4 (4.3%)

0 (0.0%)

0.944

NA

0 (0.0%)

NA

 3–6 years

9 (9.7%)

4 (6.6%)

0 (0.0%)

 7–12 years

33 (35.5%)

23 (37.7%)

8 (50.0%)

 13–20 years

41 (44.1%)

26 (42.6%)

7 (43.8%)

 ≥21 years

4 (4.3%)

2 (3.3%)

1 (6.3%)

 Not known

2 (2.2%)

6 (9.8%)

0 (0.0%)

Total

93 (100.0%)

61 (100.0%)

16 (100.0%)

 

Duration of epilepsy: n (%)

Mean duration ± SD years

NA

12.7 ± 8.8 yrs

NA

8.7 ± 7.1 yrs

17.4 ± 14.1 yrs

0.036

 0–1 year

NA

5 (8.2%)

NA

3 (15.8%)

0 (0.0%)

0.363

 2–5 years

10 (16.4%)

4 (21.1%)

1 (6.3%)

 6–10 years

10 (16.4%)

5 (26.3%)

5 (31.3%)

 11–20 years

18 (29.5%)

6 (31.6%)

6 (37.5%)

 > 20 years

13 (21.3%)

1 (5.3%)

4 (25.0%)

 Not known

5 (8.2%)

0 (0.0%)

0 (0.0%)

Total

 

61 (100.0%)

19 (100.0%)

16 (100.0%)

  1. NA Not available, SD Standard deviation, PWE Persons with epilepsy