Table 1.
Prevalence as measured by each test method at different distances from Lake Victoria
| Diagnostic method | Zone A* (9 schools, N = 327) | Zone B (12 schools, N = 457) | Zone C (28 schools, N = 1,060) |
|---|---|---|---|
| LCA | 44.0 (34.3, 54.5)† (N = 304) | 21.5 (15.5, 28.5) (N = 409) | 9.2 (7.0, 12.1) (N = 989) |
| First day CCA-1 | 70.2 (64.9, 75.1) (N = 322) | 63.3 (58.6, 67.7) (N = 449) | 39.9 (36.9, 43.0) (N = 1,029) |
| CCA-2 | 39.8 (34.5, 45.4) (N = 324) | 26.7 (22.7, 31.1) (N = 449) | 13.5 (11.5, 15.8) (N = 1,029) |
| First day Kato-Katz | 36.8 (31.5, 42.3) (N = 321) | 17.4 (14.0, 21.2) (N = 454) | 7.0 (5.5, 8.8) (N = 988) |
| Multiple Kato-Katz | 52.3 (46.5, 57.9) (N = 310) | 26.0 (21.8, 30.5) (N = 416) | 11.6 (9.7, 13.8) (N = 1,005) |
| SWAP ELISA | 43.9 (38.4, 49.4) (N = 326) | 23.2 (19.4, 27.3) (N = 457) | 16.5 (14.3, 18.9) (N = 1,060) |
CCA = circulating cathodic antigen; LCA = latent class analysis; SWAP ELISA = soluble adult worm antigen preparation enzyme-linked immunosorbent assay.
*
Zone A includes schools within 1,200 m of the lake; Zone B includes schools located between 1,200 and 3,800 m of the lake; and Zone C includes schools further than 3,800 m from the lake.
†
Exact 95% confidence interval for all except for LCA, for which a 95% credible interval is reported.