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Table 1 Baseline characteristics of the recruited pregnant women by study group (%)

From: Clinical signs and symptoms cannot reliably predict Plasmodium falciparum malaria infection in pregnant women living in an area of high seasonal transmission

  Cases Controls Total
  N = 200 N = 400 N = 600
Age group <20 years 18 (9.0) 23 (5.8) 41 (6.8)
20-34 years 160 (80.0) 328 (82.0) 488 (81.3)
≥35 years 22 (11.0) 49 (12.2) 71 (11.8)
Trimester ǂ 1st 10 (5.00 20 (5.0) 30 (5.0)
2nd 84 (42.0) 123 (30.8) 207 (34.5)
3rd 106 (53.00 257 (64.2) 363 (60.5)
Parity 0 17 (8.5) 34 (8.5) 51 (8.5)
1-3 118 (59.0) 237 (59.3) 355 (59.2)
≥4 65 (32.5) 129 (32.2) 194 (32.3)
Transmission seasonΦ No 47 (23.5) 8 (2.0) 55 (9.2)
  Yes 153 (76.5) 392 (98.0) 545 (90.8)
Sleep under bed net 155 (77.5) 364 (91.0) 519 (86.5)
Malaria infection 98 (49.0) 158 (39.5) 256 (42. 7)
  1. ǂ1st trimester: 0–12 weeks; 2nd trimester: 13–24 weeks; 3rd trimester: ≥25.
  2. ΦTransmission season: August to December, no transmission season: June to July.