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Table 1 Characteristics of cases and controls in pregnant women aged 18–49 years in Brazil

From: CoronaVac vaccine is effective in preventing symptomatic and severe COVID-19 in pregnant women in Brazil: a test-negative case-control study

Characteristics Test positive Test negative
Vaccination status
 Not vaccinated 6886 (92.75) 10,919 (87.96)
 Single dose, within 0-13 days 169 (2.28) 284 (2.29)
 Single dose, ≥ 14 days 156 (2.10) 386 (3.11)
 Two doses, within 0–13 days 45 (0.61) 192 (1.55)
 Two doses, ≥ 14 days 168 (2.26) 633 (5.10)
Age group
 < 20 406 (5.47) 940 (7.57)
 20–34 5606 (75.51) 9629 (77.57)
 35+ 1412 (19.02) 1845 (14.86)
 Missing
Self-reported race
 White 2787 (43.75) 5226 (47.93)
 Mixed Brown 3085 (48.43) 4830 (44.30)
 Black 390 (6.12) 689 (6.32)
 Others 108 (1.70) 158 (1.45)
 Missing 1054 1511
Reported co-morbidities
 Yes 554 (7.46) 767 (6.18)
 No 6870 (92.54) 11,647 (93.82)
 Missinga
Previous COVID-19-like event notified to surveillance
 Yes 2447 (32.96) 5145 (41.45)
 No 4977 (67.04) 7269 (58.55)
 Missing
Brazilian Deprivation Index
 1 (most deprived) 1940 (26.13) 3634 (29.29)
 2 1638 (22.07) 2949 (23.77)
 3 1502 (20.23) 2269 (18.29)
 4 1293 (17.42) 2039 (16.43)
 5 (less deprived) 1050 (14.15) 1518 (12.23)
 Missing 1 5
Region of residence
 North 349 (4.70) 623 (5.02)
 Northeast 1663 (22.40) 2244 (18.08)
 South 734 (9.89) 2136 (17.21)
 Southeast 3981 (53.62) 6444 (51.92)
 Midwest 697 (9.39) 965 (7.77)
 Missing 2
  1. aThose who reported only pregnancy as a condition were considered without co-morbidities