International Scholarly Research Notices

Clinical Study

Predisposing Individual Characteristics and Perinatal Outcomes of Women in the Tokyo Metropolitan Area Who Initiate Prenatal Care Late in Their Pregnancy: A Case-Control Study

Table 2

Maternal complications in the study groups. The table indicates the number of women in each group. Late attenders had a higher incidence of Chlamydia trachomatis infection, syphilis,  hepatitis B, and hepatitis C compared with the control group ( 𝑃 < 0 . 0 1 ) .
  Late attenders ( 𝑛 = 1 2 1 ) Control group ( 𝑛 = 1 , 7 8 7 ) 𝑃 v a l u e
Threatened preterm delivery3 (2.5%)83 (4.6%)0.36
Pregnancy-induced hypertension2 (1.7%)30 (1.7%)0.16
Gestational diabetes mellitus1 (0.8%)17 (1.0%)1.00
Placental abruption0 (0%)7 (0.4%)1.00
Placenta previa2 (1.7%)7 (0.4%)0.10
Preterm premature rupture of membrane1 (0.8%)17 (1.0%)1.00
Intrauterine fetal death1 (0.8%)7 (0.4%)0.40
Infection   
 Chlamydia trachomatis 19 (15.7%)6 (0.3%)<0.01
 Syphilis5 (4.1%)2 (0.1%)<0.01
 Hepatitis B virus4 (3.3%)7 (0.4%)<0.01
 Hepatitis C virus6 (5.0%)15 (0.8%)<0.01
 Human immunodeficiency virus 3 (2.5%)15 (0.8%)0.10