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Table 1 Distribution of patient characteristics at enrollment for cases and controls

From: Quantification of the dynamics of antibody response to malaria to inform sero-surveillance in pregnant women

Characteristic Cases
(n = 135)
Controls
(n = 115)
Age (years), median (IQR) 24 (20–30) 26 (22–32)
Gravidity, median (IQR) 3 (2.0–4.5) 3 (2.0–5.0)
Primigravida, n (%) 30 (22.2) 16 (13.9)
Multigravida, n (%) 105 (77.8) 99 (86.1)
Parity, median (IQR) 1 (0–3) 2 (1–4)
Haematocrit (%), median (IQR) 32.5 (30–35) 34.0 (32–36)
Anaemiaa, n (%) 32 (23.7) 11 (9.6)
Residence in refugee camp 61 (45.2) 114 (99.1)
Received chloroquine prophylaxis, n (%) 56 (41.5) 55 (47.8)
Estimated Gestational Ageb(weeks), median (IQR) 9.7 (7–14) 9.4 (7.6–11.6)
Trimester   
 1 (< 14 weeks), n (%) 102 (75.6) 98 (85.2)
 2 (14 to < 28 weeks), n (%) 31 (23) 17 (14.8)
 3 (28 week or more), n (%) 2 (1.5) 0 (0.0)
 Plasmodium spp. before enrolmentc, n (%) 75 (55.6) 42 (36.5)
 Infected with P. falciparumd, n (%) 50 (37.9) 32 (27.8)
 Infected with P. vivaxd, n (%) 32 (24.2) 13 (11.3)
 Follow up (weeks), median (range) 28.9 (22.6–32.1) 30.9 (28.3–32.4)
  1. aHaematocrit < 30%
  2. bDetermined at enrolment
  3. cAny microscopically confirmed Plasmodium infection documented at SMRU before enrolment into the study
  4. dIncludes women that have a history of both P. falciparum and P. vivax infections. Hence, the summation of P. falciparumd and P. vivaxd women does not add up to Plasmodium spp. before enrolmentc