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Table 1 Comparison of maternal characteristics, antenatal care, and syphilis history between pregnant women in syphilis discordant and concordant couples (n, %)

From: Differences in maternal characteristics and pregnancy outcomes between syphilitic women with and without partner coinfection

CharacteristicsSyphilis discordant (n1 = 2419)Syphilis concordant(n2 = 657)χ2P
Maternal age
  < 25590 (24.4)180 (27.4)3.810.28
 25–29918 (37.9)239 (36.4)
 30–34552 (22.8)154 (23.4)
  ≥ 35359 (14.8)84 (12.8)
Ethnic group
 Han2261 (93.5)604 (91.9)1.910.17
 Minority158 (6.5)53 (8.1)
Education
 College252 (10.4)70 (10.7)0.360.84
 Middle school1836 (75.9)493 (75.1)
 Primary318 (13.1)92 (14.0)
 Unknown13 (0.5)2 (0.3)
Occupation
 Farmer689 (28.5)187 (28.5)6.150.05
 Fix employed555 (22.9)178 (27.1)
 Unemployed1089 (45.0)266 (40.5)
 Unknown86 (3.6)26 (4.0)
Marriage
 Married2272 (93.9)622 (94.7)0.520.47
 Others147 (6.1)35 (5.3)
Gravidity
 1465 (19.2)115 (17.5)3.740.15
 2735 (30.4)183 (27.9)
  ≥ 31219 (50.4)359 (54.6)
Parity
 01301 (53.8)287 (43.7)33.01< 0.001
 1921 (38.1)276 (42.0)
  ≥ 2197 (8.1)94 (14.3)
Number of children
 01364 (56.4)315 (47.9)21.61< 0.001
 1907 (37.5)275 (41.9)
  ≥ 2148 (6.1)67 (10.2)
First ANC gestational week
  ≤ 121350 (55.8)331 (50.4)19.54< 0.001
 13–27854 (35.3)230 (35.0)
  ≥ 28215 (8.9)96 (14.6)
Previous syphilis infection
 No1219 (50.4)320 (48.7)0.590.44
 Yes1200 (49.6)337 (51.3)
Diagnose of syphilis infection
 During pregnancy2265 (93.6)589 (89.6)13.38< 0.001
 At delivery139 (5.8)64 (9.7)
 Before pregnancy15 (0.6)4 (0.6)
Syphilis stage
 latent2090 (86.4)519 (79.0)21.19< 0.001
 I83 (3.4)40 (6.1)
 II12 (0.5)7 (1.1)
 III4 (0.2)5 (0.8)
 Unknown230 (9.5)86 (13.1)
TRUST/RPR titers
  ≤ 1:82327 (96.2)614 (93.5)9.260.002
  > 1:892 (3.8)43 (6.5)
  1. Note: Unknown data were excluded. TRUST tolulized red unheated serum test, RPR rapid plasma regain
  2. Bold entries have significant values