Table 1.
Background child, family, and vaccination provider characteristics.
| Vaccine Type |
||||||||
|---|---|---|---|---|---|---|---|---|
| Total |
Received at Least 1 Combo Vaccine |
No Combo Vaccines (Single-Antigen Only) |
||||||
| Characteristic | n | % | n | % | n | % | P Value | |
| Vaccine type | No combination vaccines | 576 563 | 14.26 | … | … | … | … | |
| Had at least 1 combination vaccine | 3 466 596 | 85.74 | … | … | … | … | ||
| Maternal age, years | < 20 | 70 396 | 1.74 | 61 283 | 1.77 | 9113 | 1.58 | 0.007 |
| 20–30 | 1 674 987 | 41.43 | 1 474 115 | 42.52 | 200 873 | 34.84 | ||
| > 30 | 2 297 776 | 56.83 | 1 931 198 | 55.71 | 366 577 | 63.58 | ||
| Maternal marital status | Married | 2 534 567 | 62.69 | 2 140 025 | 61.73 | 394 542 | 68.43 | 0.015 |
| Maternal education | < High school | 749 284 | 18.53 | 647 610 | 18.68 | 101 674 | 17.63 | < 0.001 |
| High school | 1 082 417 | 26.77 | 945 624 | 27.28 | 136 793 | 23.73 | ||
| > High school | 943 370 | 23.33 | 834 419 | 24.07 | 108 951 | 18.90 | ||
| College graduate | 1 268 088 | 31.36 | 1 038 943 | 29.97 | 229 145 | 39.74 | ||
| Census region | Northeast | 651 732 | 16.12 | 537 510 | 15.51 | 114 222 | 19.81 | 0.090 |
| South | 1 552 917 | 38.41 | 1 351 164 | 38.98 | 201 754 | 34.99 | ||
| Midwest | 842 851 | 20.85 | 718 811 | 20.74 | 124 040 | 21.52 | ||
| West | 995 659 | 24.63 | 859 111 | 24.78 | 136 548 | 23.68 | ||
| Poverty status | At or below poverty line | 1 458 429 | 36.07 | 1 271 180 | 36.67 | 187 249 | 32.48 | 0.007 |
| Above poverty line | 2 400 123 | 59.36 | 2 025 724 | 58.44 | 374 399 | 64.94 | ||
| Unknown | 184 607 | 4.57 | 169 692 | 4.90 | 14 915 | 2.59 | ||
| Number of children in household | 1 | 1 017 465 | 25.17 | 877 675 | 25.32 | 139 790 | 24.25 | 0.856 |
| 2 or 3 | 2 428 384 | 60.06 | 2 081 045 | 60.03 | 347 340 | 60.24 | ||
| 4 or more | 597 310 | 14.77 | 507 876 | 14.65 | 89 434 | 15.51 | ||
| Child's race/ethnicity | Non-Hispanic white | 1 884 858 | 53.01 | 1 606 451 | 52.61 | 278 407 | 55.46 | 0.569 |
| Hispanic | 1 113 340 | 27.54 | 957 999 | 27.64 | 155 341 | 26.94 | ||
| Non-Hispanic black | 557 206 | 13.78 | 488 968 | 14.11 | 68 238 | 11.84 | ||
| Other | 487 754 | 12.06 | 413 177 | 11.92 | 74 577 | 12.93 | ||
| Child's sex | Male | 2 041 272 | 50.49 | 1 754 769 | 50.62 | 286 502 | 49.69 | 0.719 |
| Number of vaccination providers for child | 1 | 2 693 774 | 66.63 | 2 324 756 | 67.06 | 369 019 | 64.00 | 0.024 |
| 2 | 1 099 518 | 27.19 | 920 049 | 26.54 | 179 469 | 31.13 | ||
| 3+ | 249 728 | 6.18 | 221 652 | 6.39 | 28 076 | 4.87 | ||
| Type of vaccination providers for child | All public | 494 927 | 12.24 | 437 386 | 12.62 | 57 541 | 9.98 | < 0.001 |
| All private | 2 349 410 | 58.11 | 1 970 467 | 56.84 | 378 944 | 65.72 | ||
| Other/mixed | 1 198 822 | 29.65 | 1 058 743 | 30.54 | 140 078 | 24.30 | ||
| Had Medicaid or SCHIP | Yes | 2 020 460 | 49.97 | 1 774 113 | 51.18 | 246 348 | 42.73 | 0.002 |
SCHIP = State Children's Health Insurance Program.