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Table 4 Household elevation and proximity to water bodies in villages around Lake Tana, Ethiopia, October 2016–June 2017

From: Travel to farms in the lowlands and inadequate malaria information significantly predict malaria in villages around Lake Tana, northwest Ethiopia: a matched case–control study

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)
  1. **p < 0.05 was considered statistically significant
  2. aContinuous variables; summarized through median and IQR