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Table 1 Demographic and intervention characteristics of 786 study participants recruited in Engela (December 2012–July 2014) and Omusati and Oshikuku (January 2014–July 2014)

From: Malaria risk in young male travellers but local transmission persists: a case–control study in low transmission Namibia

Variable Engela Omusati/Oshikuku
Cases n = 57 (%) Controls n = 298 (%) Cases n = 50 (%) Controls n = 381 (%)
Sex
 Female 18 (31.6) 174 (58.4) 26 (52.0) 216 (56.7)
 Male 39 (68.4) 124 (41.6) 24 (48.0) 165 (43.3)
Age (years)
 0–4 6 (10.5) 37 (12.4) 4 (8.0) 67 (17.6)
 5–14 13 (22.8) 91 (30.5) 12 (24.0) 127 (33.3)
 15–24 26 (45.6) 81 (27.2) 14 (28.0) 73 (19.2)
 25–34 8 (14.0) 36 (12.1) 7 (14.0) 38 (10.0)
 35–44 2 (3.5) 20 (6.7) 7 (14.0) 19 (5.0)
 45+ 2 (3.5) 31 (10.4) 6 (12.0) 34 (8.9)
Missing 0 (0.0) 2 (0.7) 0 (0.0) 23 (6.0)
House sprayed in past year 14 (24.6) 109 (36.6) 14 (28.0) 68 (17.8)
Missing 1 (1.8) 1 (0.3) 0 (0.0) 2 (0.5)
Slept under net previous night 16 (28.1) 42 (14.1) 21 (42.0) 106 (27.8)
Missing 0 (0.0) 4 (1.3) 0 (0.0) 5 (1.3)
Travel to endemic areas (≥1 PfPR2-10)a 21 (36.8) 25 (8.4) 5 (10.0) 33 (8.7)
  1. PfPR2-10: mean annually averaged prevalence of P falciparum infection in 2–10 year olds
  2. aAverage of 2013 and 2014