Race, Socioeconomic Status, and Age: Exploring Intersections in Preterm Birth Disparities among Teen Mothers
Table 2
Chi-square analyses testing for racial differences in PTB rates stratified by maternal age and income.
Full sample (6,472)
African-American (781)
White (691)
Chi-squarea
Overall PTB rate
9.6%
10.7%
8.7%
19.55
Low (<$31,389)
10.2%
10.4%
9.5%
0.77
Middle ($31,389–$48,466)
9.5%
10.1%
9.1%
2.56
High (>$48,466)
9.4%
12.5%
7.5%
28.16
Age <17 years
10.5%
12.2%
8.2%
8.13
Age 17–19
9.5%
10.5%
8.7%
12.55
Low income, age <17 years
10.9%
11.5%
8.9%
0.75
Low income, age 17–19
10.0%
10.2%
9.6%
0.32
Middle income, age <17 years
10.5%
12.3%
8.7%
3.02
Middle income, age 17–19
9.4%
9.8%
9.1%
0.33
High income, age <17 years
9.9%
13.5%
7.0%
5.53
High income, age 17–19
9.3%
12.4%
7.6%
22.71
Significant differences between racial categories, , , . Chi-square statistics reflect tests for racial differences only. Other analyses for the full sample (not shown) found no significant differences between younger and older mothers ( = , ) or between mothers in each of the three income groups (, ).
