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Table 3 Sample characteristics and risk factors for malaria infection and bed net use in school children in Tanzania

From: Nationwide school malaria parasitaemia survey in public primary schools, the United Republic of Tanzania

  Total children Malaria (N = 49,102) Bed net use (N = 47,800)
Children tested positive Children sleeping under bed net
N % n % 95% CI n % 95% CI
Total 49,113 100 10,627 22 (19.6–23.9) 33,284 70 (67.6–71.6)
Gender
 Male 24,205 49.3 5606 23.2 (21.0–25.5) 16,077 68.3 (66.1–70.3)
 Female 24,681 50.3 4940 20.0 (18.0–22.2) 17,078 71.0 (68.9–73)
 Missing 227 0.5 81 35.7 129 63.9
Age
 < 9 9075 18.5 1651 18.2 (16.1–20.5) 5974 68.8 (66.3–71.2)
 9–12 18,892 38.5 4045 21.4 (19.2–23.8) 13,106 71.2 (69.2–73.3)
 > 12 20,730 42.2 4847 23.4 (21.2–25.7) 13,957 68.6 (66.3–70.8)
 Missing 416 0.9 84 20.2 247 62.7
Parental education
 No school 3736 7.6 1074 28.8 (24.4–33.5) 1930 54.7 (50.2–59.1)
 Primary 23,445 47.7 5163 22.0 (19.4–24.8) 14,968 65.8 (63.1–68.3)
 Secondary 4547 9.3 808 17.8 (15.1–20.9) 3430 77.5 (74.8–80)
 Diploma or higher 525 1.1 52 9.9 (7.0–13.9) 415 80.7 (76.1–84.7)
 Missing 5424 11.0 970 17.9 3617 69.7
 Not interviewed* 11,436 23.3 2560 22.4 8924 78.4
Bed net use
 No 14,516 29.6 2943 20.3 (17.8–23.0)
 Yes 33,284 67.8 7270 21.9 (19.6–24.2)
 Missing 1313 2.7 414 31.5
Zone
 Eastern 6967 14.2 1269 18.2 (13.3–24.4) 5819 86.6 (83.4–89.3)
 Western 4805 9.8 1449 30.2 (25.5–35.2) 3221 68.8 (64–73.2)
 Southern 4002 8.1 1344 33.6 (27.2–40.8) 3255 81.6 (76.8–85.6)
 Southern highlands 4116 8.4 495 12.0 (7.2–19.4) 2350 58.7 (52.4–64.7)
 Southwest highlands 4867 9.9 846 17.4 (11.6–25.2) 2946 61.6 (55.3–67.5)
 Central 5653 11.5 156 2.8 (1.6–4.6) 3077 55.1 (49.6–60.5)
 Northern 6191 12.6 317 5.1 (3.1–8.4) 3360 55.6 (49.4–61.7)
 Lake 12,512 25.5 4751 38.0 (33.6–42.5) 9256 77.2 (73.1–80.8)
 Missing 0 0.0 0 0.0 0 0.0
Area
 Urban 9708 19.8 588 6.1 (4.0–9.1) 7866 82.2 (78.7–85.2)
 Rural 39,405 80.2 10,039 25.5 (23.1–28.0) 25,418 66.5 (64.1–68.8)
 Missing 0 0.0 0 0.0 0 0.0
Eco-zone (tropical) *
 Dry forest 7124 19.0 2247 31.5 (25.9–37.8) 5417 79.4 (74.7–83.4)
 Moist decid. forest 5819 15.5 1816 31.2 (25.1–38) 3786 67.8 (62–73.1)
 Mountain system 6053 16.1 723 11.9 (7.9–17.6) 3329 57.0 (50.3–63.5)
 Rainforest 3331 8.9 1272 38.2 (28.6–48.7) 2664 82.8 (76.3–87.8)
 Scrubland 15,216 40.5 2009 13.2 (10.3–16.7) 9078 61.2 (57.4–64.9)
 Missing 11,570 23.6 2560 22.2 9010 77.9
Altitude (m)
 < 750 13,228 26.9 3248 24.6 (20.7–28.9) 10,697 82.7 (80.1–85)
 750–1250 18,901 38.5 5040 26.7 (23.3–30.4) 13,284 72.0 (68.8–75)
 1250–1750 14,581 29.7 2335 16.0 (12.6–20.1) 8434 59.8 (56–63.4)
 > 1750 2403 4.9 4 0.2 (0.1–0.5) 869 37.8 (30.5–45.7)
 Missing 0 0.0 0 0.0 0 0.0
  1. * No data for children sampled in phase I