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Table 2 Timing of maternal syphilis testing and serologic diagnoses in total and high-risk populations

From: Syphilis testing adherence among women with livebirth deliveries: Indianapolis 2014-2016

Deliveries Maternal testing N (%) 2014 N (%) 2015 N (%) 2016 N (%)
Time of syphilis test Totala Positiveb High-Riskf Totalc High-Risk Casesd Totala Positiveb High-Risk Totalc High-Risk Casesd Totala Positiveb High-Risk Totalc High-Risk Casesd Totala Positiveb High-Risk Totalc High-Risk Casesd
First trimester 8,308 (39.1%) 20 (48.8%) 1,569 (42.4%) 5 (55.6%) 1,122 (17.8%) 7 (43.8%) 235 (21.0%) 3 (42.9%) 3,446 (43.4%) 7 (50%) 684 (48.4%) 2 (100%) 3,740 (53.4%) 6 (54.5%) 650 (55.5%) 0
First trimester onlye (minus second and third) 798 (3.8%) 0 147 (4.0%) 0 152 (2.4%) 0 28 (2.5%) 0 333 (4.2%) 0 61 (4.3%) 0 313 (4.5%) 0 58 (5.0%) 0
First trimester or second trimester 12,782 (60.1%) 32 (78.1%) 2,498 (67.4%) 5 (55.5%) 2,385 (37.8%) 9 (56.3%) 481 (42.9%) 3 (42.9%) 5,109 (64.3%) 14 (100%) 1,043 (73.8%) 2 (100%) 5,288 (75.5%) 9 (81.8%) 974 (83.2%) 0
Second trimester 7,028 (33.1%) 25 (61.0%) 1,442 38.9%) 2 (22.2%) 1,671 (26.5%) 7 (43.8%) 333 (29.7%) 1 (14.3%) 2,744 (34.5%) 11 (78.6%) 578 (40.9%) 1 (50%) 2,613 (37.3%) 7 (63.6%) 531 (45.3%) 0
Second trimester onlye (minus first and third) 2,099 (9.9%) 3 (7.3%) 430 (11.6%) 0 748 (11.9%) 1 (6.3%) 147 (13.1%) 0 765 (9.6%) 1 (7.1%) 165 (11.7%) 0 586 (6.9%) 1 (9.1%) 118 (10.1%) 0
Third trimester 10,193 (47.9%) 29 (70.7%) 1,926 (52.0%) 6 (66.7%) 2,192 (34.7%) 10 (62.5%) 436 (38.9%) 5 (71.4%) 4,083 (51.4%) 11 (78.6%) 793 (56.1%) 1 (50%) 3,918 (55.9%) 8 (72.7%) 697 (58.7%) 0
Third trimester onlye (Minus 1st and 2nd) 2,647 (12.5%) 6 (14.6%) 471 (12.7%) 2 (22.2%) 1085 (17.2%) 4 (25.0%) 209 (18.7%) 2 (28.6%) 1067 (13.4%) 0 173 (12.2%) 0 495 (7.1%) 2 (18.2%) 89 (7.6%) 0
30 days before delivery 15,027 (70.7%) 36 (87.8%) 2,874 (77.6%) 7 (77.8%) 3,270 (51.8%) 13 (81.3%) 645 (57.6%) 5 71.4%) 6,060 (76.3%) 14 (100%) 1,185 (83.8%) 2 (100%) 5,697 (81.3%) 9 (81.8%) 1,044 (89.2%) 0
Any trimester plus delivery 17,367 (81.7%) 41 (100%) 3,302 (89.1%) 9 (100%) 4,520 (71.7%) 16 (100%) 891 (79.6%) 7 (100%) 6,781 (85.3%) 14 (100%) 1,308 (92.5%) 2 (100%) 6,068 (86.6%) 11 (100%) 1,103 (94.2%) 0
At delivery only 1,938 (9.1%) 3 (7.3%) 333 (9.0%) 2 (22.2%) 1,050 (16.6%) 3 (18.8%) 201 (18.0%) 2 (28.6%) 605 (7.6%) 0 92 (6.5%) 0 283 (4.0%) 0 40 (3.4%) 0
Total 21,260 41 3,705 9 6,309 16 1,120 7 7,945 14 1,414 2 7,006 11 1,171 0
  1. a Total, indicates the overall study population
  2. b Positive, indicates mothers in the overall study population classified as syphilis cases. Note that it was not possible to determine the difference between current and prior infection among the syphilis cases
  3. c High risk total, indicates the overall population that resided in areas with high prevalence of syphilis
  4. d High risk cases, indicates the mothers in the overall high-risk population classified as syphilis cases
  5. e Mothers were only tested in the trimester indicated and not in any other trimester
  6. f High Risk was defined based on women residing in zip codes with high prevalence of syphilis