Table 3 Placental Plasmodium falciparum infection in primiparae separated by blood group O ( n = 174) vs non-O blood groups ( n = 126)
From: Reduced prevalence of placental malaria in primiparae with blood group O
Placental infection status | Blood group | OR (95% CI) | P | aOR* (95% CI) | P | |
|---|---|---|---|---|---|---|
O | Non-O | |||||
Microscopy positive (%) | 42.5 | 50.0 | 0.74 (0.45-1.20) | 0.20 | 0.80 (0.49-1.28) | 0.35 |
Haemozoin positive (%) | 36.2 | 50.8 | 0.55 (0.34-0.90) | 0.01 | 0.61 (0.37-0.98) | 0.04 |
PCR positive (%) | 60.3 | 70.6 | 0.63 (0.38-1.06) | 0.07 | 0.68 (0.41-1.13) | 0.14 |
Any positive finding (%)† | 61.5 | 76.2 | 0.50 (0.29-0.86) | 0.007 | 0.55 (0.33-0.94) | 0.03 |
Microscopic infection status (%) | ||||||
Pigment only | 5.2 | 8.7 | 0.47 (0.16-1.32) | 0.11 | 0.62 (0.23-1.67) | 0.35 |
Pigment plus parasites | 31.0 | 42.1 | 0.58 (0.34-1.0) | 0.04 | 0.64 (0.38-1.09) | 0.10 |
Parasites only | 11.5 | 7.9 | 1.14 (0.46-2.85) | 0.75 | 1.33 (0.55-3.20) | 0.52 |
PCR-based infection status (%) | ||||||
Submicroscopic | 17.8 | 22.2 | 0.56 (0.28-1.14) | 0.08 | 0.59 (0.30-1.14) | 0.12 |
Microscopic | 42.5 | 50.0 | 0.60 (0.34-1.04) | 0.05 | 0.64 (0.37-1.11) | 0.12 |