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Table 2 Association of peripheral blood malaria infection with elevated umbilical artery resistance index (>90th centile)

From: Effects of Plasmodium falciparum infection on umbilical artery resistance and intrafetal blood flow distribution: a Doppler ultrasound study from Papua New Guinea

  % (N) OR (95% CI) P aOR (95% CI)a P
Peripheral malaria infection prior to Doppler scanb
 Any species 13.9 (63/452) 1.8 (0.8–3.9) 0.17 1.7 (0.8–3.9) 0.20
 P.f. 11.5 (52/452) 2.3 (1.0–5.1) 0.048 2.3 (1.0–5.2) 0.047
 P.v. 3.1 (14/452)
 P.f. (sub) 4.8 (21/442) 2.3 (0.7–7.3) 0.15 2.1 (0.7–6.5) 0.20
Peripheral malaria infection at any stage in pregnancy (as a measure of exposure)c
 Any species 21.1 (76/361) 2.0 (1.0–4.0) 0.05 1.9 (0.9–4.0) 0.07
 P.f. 16.6 (60/361) 2.4 (1.1–4.9) 0.021 2.4 (1.1–4.9) 0.024
 P.v. 6.7 (24/361) 1.6 (0.6–4.9) 0.37 1.6 (0.5–5.0) 0.42
 P.f. (sub) 7.4 (26/350) 2.7 (1.1–7.0) 0.04 2.6 (1.0–6.6) 0.05
Cumulative malaria detections with any species (as measure of exposure)c
 1 17.5 (63/361) 1.8 (0.9–4.0) 0.12 1.8 (0.8–3.9) 0.15
 ≥2 3.6 (13/361) 2.6 (0.7–9.2) 0.14 2.6 (0.7–9.8) 0.15
  1. P.f., P. falciparum; P.v., P. vivax; sub, sub-microscopic
  2. aAdjusted for fetal sex, gravidity and gestational age
  3. bN (%) represents the number of scans
  4. cN (%) represents the number of women