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Table 1 Participant characteristics by Plasmodium exposure

From: Falciparum but not vivax malaria increases the risk of hypertensive disorders of pregnancy in women followed prospectively from the first trimester

Characteristic No malaria P. falciparum P. vivax
Number 19,424 1047 1733
Maternal age, years, mean (SD) 26.2 (6.5) 25.2 (6.2) 25.4 (6.7)
Gravidity, n (%)
 Primi 4898 (25.2%) 270 (25.8%) 507 (29.3%)
 Multi 14,526 (74.8%) 777 (74.2%) 1226 (70.7%)
Refugee status, n (%)
 Refugee 14,393 (74.1%) 592 (56.5%) 707 (40.8%)
 Migrant 4450 (22.9%) 362 (34.6%) 951 (54.9%)
 Visitor (to refugee camp) 580 (3.0%) 93 (8.9%) 75 (4.3%)
EGA first ANC, weeks, median (range) 9 (−1–14)a 10 (0–14) 9 (0–14)
Anemia at first ANC, n (%)
 None 17,652 (95.5%) 777 (83.9%) 1569 (92.9%)
 Moderate 825 (4.5%) 148 (16.0%) 120 (7.1%)
 Severe 3 (0.02%) 1 (0.1%) 0 (0%)
First trimester weight, kg, mean (SD) 48.0 (7.7) 46.5 (6.1) 46.7 (6.8)
Weight gain, kg, mean (SD) 9.0 (3.9) 8.0 (3.6) 8.2 (3.6)
Chronic HTN, n (%)
 No 19,266 (99.2%) 1040 (99.3%) 1723 (99.4%)
 Yes 158 (0.8%) 7 (0.7%) 10 (0.6%)
Number of consultations, median (range) 20 (1–43) 19 (1–37) 22 (1–38)
Year of delivery, median (range) 2007 (1986–2016) 2000 (1987–2015) 2006 (1987–2016)
EGA delivery, weeks, median (range) 39 (28–44) 39 (28–45) 39 (28–44)
Place of delivery
 Home 4920 (25.3%) 576 (55.0%) 730 (42.1%)
 SMRU 12,909 (66.5%) 441 (39.3%) 815 (47.0%)
 Hospital 1595 (8.2%) 60 (5.7%) 188 (10.9%)
  1. SD standard deviation, EGA estimated gestational age, ANC antenatal clinic, HTN hypertension, SMRU Shoklo Malaria Research Unit (SMRU)
  2. a(−1) permitted given known margins of error of this measurement