Advances in Epidemiology / 2015 / Article / Tab 1

Research Article

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 years2,013 (3.38)12,577 (2.20)
 18–35 years52,756 (88.57)519,382 (90.69)
 >35 years4,795 (8.05)40,735 (7.11)
Maternal race<0.001
 White 50,817 (85.32)524,326 (91.56)
 Black7,536 (12.65)38,788 (6.77)
 Other 1,211 (2.03)9,580 (1.67)
Infant sex<0.001
 Male32,366 (54.34)291,659 (50.93)
 Female 27,198 (45.66)281,035 (49.07)
Maternal educational level<0.001
 <12 years10,943 (18.37)79,206 (13.83)
 >12 years48,621 (81.63)493,488 (86.17)
Paternal educational level<0.001
 <12 years9,910 (16.64)74,940 (13.09)
 >12 years49,654 (83.36)497,754 (86.91)
Marital status<0.001
 Married 47,562 (79.85)491,172 (85.77)
 Not married12,002 (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 drinking0.027
 Yes 822 (1.38)7,283 (1.27)
 No58,742 (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.