International Scholarly Research Notices / 2012 / Article / Tab 1

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 1

Demographic and maternal characteristics of the study groups. The table indicates the number of women in each group and the data are presented as the mean ± standard deviation. In the late attenders group, the mean maternal age was less than that in the control group ( 𝑃 < 0 . 0 1 ). Late attenders had statistically significant higher rates of unmarried status, history of divorce, absence of a relationship with the child’s father, cigarette smoking and alcohol consumption, and history of abortion compared with those of 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

Maternal age (years), mean ± SD 2 6 . 4 ± 6 . 6 3 2 . 1 ± 5 . 1 <0.01
 <20 years26 (21.5%)17 (1.0%)<0.01
 20 to 29 years57 (47.1%)501 (28.0%)
 30 to 39 years37 (30.6%)1150 (64.4%)
 ≥40 years1 (0.8%)119 (6.7%)
Primiparity/multiparity65/561,034/7530.39
Multiparas with 4 or more previous deliveries7 (5.8%)19 (1.1%)<0.01
Women who had a history of induced abortion53 (43.8%)263 (14.7%)<0.01
Unmarried102 (84.3%)52 (2.8%)<0.01
Women who had a history of divorce 43 (35.5%)49 (2.7%)<0.01
Women who had no relationship with the child’s father84 (69.4%)36 (2.0%)<0.01
Cigarette smoking53 (43.8%)58 (3.2%)<0.01
Alcohol consumption36 (29.8%)54 (3.0%)<0.01

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