Table 4 Household elevation and proximity to water bodies in villages around Lake Tana, Ethiopia, October 2016–June 2017
Variables | Malaria cases (n = 303) n, % (95% CI) | Controls (n = 303) n, % (95% CI) | Total n, % (95% CI) | Pearson’s X2/Fisher’s exact test** |
|---|---|---|---|---|
HH elevation (m)a | 1854 (1821–1907) | 1846 (1818–1893) | 1851 (1820–1904) | 0.426 |
1701–1900 | 224, 73.9 (68.7–78.6) | 230, 75.9 (70.7–80.4) | 454, 74.9 (71.3–78.2) | |
1901–2100 | 72, 23.8 (19.3–28.9) | 70, 23.1 (18.7–28.2) | 142, 23.4 (20.2–27.0) | |
> 2100 | 7, 2.3 (1.1–4.8) | 3, 1.0 (0.3–3.0) | 10, 1.7 (0.9–3.0) | |
House proximity to Lake Tana (km)a | 6.5 (5.4–9.5) | 6.9 (5.3–8.8) | 6.8 (5.3–8.9) | 0.720 |
< 2 | 18, 5.9 (3.8–9.3) | 23, 7.6 (5.1–11.2) | 41, 6.8 (5.0–9.1) | |
2–4 | 22, 7.3 (4.8–10.8) | 22, 7.3 (4.8–10.8) | 44, 7.2 (5.4–9.6) | |
> 4 | 263, 86.8 (82.5–90.2) | 258, 85.1 (80.7–88.7) | 521, 86.0 (83.0–88.5) | |
House proximity to water body 1 (m)a | 823 (548–1372) | 918 (530–1482) | 858.5 (545–1417) | 0.345 |
< 250 | 18, 5.9 (3.8–9.3) | 13, 4.3 (2.5–7.3) | 31, 5.1 (3.6–7.2) | |
250–500 | 43, 14.2 (10.7–18.6) | 54, 17.8 (13.9–22.6) | 97, 16.0 (13.3–19.2) | |
> 500 | 242, 79.9 (74.9–84.0) | 236, 77.9 (72.8–82.2) | 478, 78.9 (75.4–82.0) | |
House proximity to water body 2 (m)a | 1770 (909–2343) | 1783 (967–2432) | 1776.5 (932–2383) | 0.634 |
< 250 | 10, 3.3 (1.8–6.0) | 12, 4.0 (2.3–6.9) | 22, 3.6 (2.4–5.5) | |
250–500 | 20, 6.6 (4.3–10.0) | 15, 5.0 (3.0–8.1) | 35, 5.8 (4.2–7.9) | |
> 500 | 273, 90.1 (86.2–93.0) | 276, 91.0 (87.3–93.8) | 549, 90.6 (88.0–92.7) |