Cohort demographic characteristics
| . | Pregnancies . | US birth certificate data . | ||
|---|---|---|---|---|
| (N = 10 252 880) . | (N = 46 423 127) . | |||
| Age, y | ||||
| <20 | 697 063 | 6.8% | 2 847 328 | 6.1% |
| 20-34 | 7 637 635 | 74.5% | 35 782 150 | 77.1% |
| ≥35 | 1 917 065 | 18.7% | 7 793 659 | 16.8% |
| Overall mean, y | 29.5 | 29 | ||
| Primary payor∗ | ||||
| Commercial insurer | 4 264 026 | 41.6% | 11 252 650 | 49.7% |
| Medicaid | 1 111 368 | 10.8% | 9 478 566 | 41.9% |
| Self-pay | 86 160 | 0.8% | 913 660 | 4.0% |
| Other | 1 823 790 | 17.8% | 973 690 | 4.3% |
| Census division | ||||
| New England | 415 265 | 4.1% | 1 772 902 | 3.8% |
| Mid Atlantic | 1 412 147 | 13.8% | 5 665 326 | 12.2% |
| South Atlantic | 2 260 046 | 22.0% | 8 832 494 | 19.0% |
| East South Central | 304 503 | 3.0% | 2 781 122 | 6.0% |
| West South Central | 1 372 830 | 13.4% | 6 419 230 | 13.8% |
| East North Central | 809 709 | 7.9% | 6 558 943 | 14.1% |
| West North Central | 471 243 | 4.6% | 3 190 253 | 6.9% |
| Mountain | 838 531 | 8.2% | 3 585 200 | 7.7% |
| Pacific | 1 991 922 | 19.4% | 7 617 667 | 16.4% |
| Calendar year | ||||
| 2010 | 900 589 | 8.8% | 3 999 386 | 8.6% |
| 2011 | 868 422 | 8.5% | 3 953 590 | 8.5% |
| 2012 | 848 041 | 8.3% | 3 952 841 | 8.5% |
| 2013 | 880 091 | 8.6% | 3 932 181 | 8.5% |
| 2014 | 879 959 | 8.6% | 3 988 076 | 8.6% |
| 2015 | 890 489 | 8.7% | 3 978 497 | 8.6% |
| 2016 | 852 857 | 8.3% | 3 945 875 | 8.5% |
| 2017 | 840 425 | 8.2% | 3 855 500 | 8.3% |
| 2018 | 844 965 | 8.2% | 3 791 712 | 8.2% |
| 2019 | 841 918 | 8.2% | 3 747 540 | 8.1% |
| 2020 | 802 106 | 7.8% | 3 613 647 | 7.8% |
| 2021 | 803 018 | 7.8% | 3 664 292 | 7.9% |
| . | Pregnancies . | US birth certificate data . | ||
|---|---|---|---|---|
| (N = 10 252 880) . | (N = 46 423 127) . | |||
| Age, y | ||||
| <20 | 697 063 | 6.8% | 2 847 328 | 6.1% |
| 20-34 | 7 637 635 | 74.5% | 35 782 150 | 77.1% |
| ≥35 | 1 917 065 | 18.7% | 7 793 659 | 16.8% |
| Overall mean, y | 29.5 | 29 | ||
| Primary payor∗ | ||||
| Commercial insurer | 4 264 026 | 41.6% | 11 252 650 | 49.7% |
| Medicaid | 1 111 368 | 10.8% | 9 478 566 | 41.9% |
| Self-pay | 86 160 | 0.8% | 913 660 | 4.0% |
| Other | 1 823 790 | 17.8% | 973 690 | 4.3% |
| Census division | ||||
| New England | 415 265 | 4.1% | 1 772 902 | 3.8% |
| Mid Atlantic | 1 412 147 | 13.8% | 5 665 326 | 12.2% |
| South Atlantic | 2 260 046 | 22.0% | 8 832 494 | 19.0% |
| East South Central | 304 503 | 3.0% | 2 781 122 | 6.0% |
| West South Central | 1 372 830 | 13.4% | 6 419 230 | 13.8% |
| East North Central | 809 709 | 7.9% | 6 558 943 | 14.1% |
| West North Central | 471 243 | 4.6% | 3 190 253 | 6.9% |
| Mountain | 838 531 | 8.2% | 3 585 200 | 7.7% |
| Pacific | 1 991 922 | 19.4% | 7 617 667 | 16.4% |
| Calendar year | ||||
| 2010 | 900 589 | 8.8% | 3 999 386 | 8.6% |
| 2011 | 868 422 | 8.5% | 3 953 590 | 8.5% |
| 2012 | 848 041 | 8.3% | 3 952 841 | 8.5% |
| 2013 | 880 091 | 8.6% | 3 932 181 | 8.5% |
| 2014 | 879 959 | 8.6% | 3 988 076 | 8.6% |
| 2015 | 890 489 | 8.7% | 3 978 497 | 8.6% |
| 2016 | 852 857 | 8.3% | 3 945 875 | 8.5% |
| 2017 | 840 425 | 8.2% | 3 855 500 | 8.3% |
| 2018 | 844 965 | 8.2% | 3 791 712 | 8.2% |
| 2019 | 841 918 | 8.2% | 3 747 540 | 8.1% |
| 2020 | 802 106 | 7.8% | 3 613 647 | 7.8% |
| 2021 | 803 018 | 7.8% | 3 664 292 | 7.9% |
Primary payor was only available in US birth certificate data from 2016 to 2021.