Survival of Preterm Singleton Deliveries: A Population-Based Retrospective Study
Table 1
Sociodemographic characteristics of the study population.
Predictors
Preterm birth+ (%)
Term birth (%)
value+
Maternal age
<0.001
<18 years
2,013 (3.38)
12,577 (2.20)
18–35 years
52,756 (88.57)
519,382 (90.69)
>35 years
4,795 (8.05)
40,735 (7.11)
Maternal race
<0.001
White
50,817 (85.32)
524,326 (91.56)
Black
7,536 (12.65)
38,788 (6.77)
Other
1,211 (2.03)
9,580 (1.67)
Infant sex
<0.001
Male
32,366 (54.34)
291,659 (50.93)
Female
27,198 (45.66)
281,035 (49.07)
Maternal educational level
<0.001
<12 years
10,943 (18.37)
79,206 (13.83)
>12 years
48,621 (81.63)
493,488 (86.17)
Paternal educational level
<0.001
<12 years
9,910 (16.64)
74,940 (13.09)
>12 years
49,654 (83.36)
497,754 (86.91)
Marital status
<0.001
Married
47,562 (79.85)
491,172 (85.77)
Not married
12,002 (20.15)
81,522 (14.23)
Maternal smoking
<0.001
Yes
13,157 (22.09)
97,363 (17.00)
No
46,407 (77.91)
475,331 (83.00)
Maternal drinking
0.027
Yes
822 (1.38)
7,283 (1.27)
No
58,742 (98.62)
565,411 (98.73)
values <0.05 were considered significant. Other race = Indian, Chinese, Japanese, Hawaiian, Filipino, Asian Indian, Korean, Samoan, Vietnamese, Guamanian, and other Asian or Pacific Islander race.
