Table 1. Demographic Characteristics of Case and Control Parents by Cohort.
| Characteristics | Parents, No. (%) | P value | |
|---|---|---|---|
| Case cohort | Control cohort | ||
| Prematurity cohort | |||
| Parents, No. | 2093 | 6062 | NA |
| Age, y | |||
| <19 | 2 (0.1) | 0 | .001 |
| 19 to <29 | 204 (9.8) | 667 (11.0) | |
| 29 to <39 | 1407 (67.3) | 4178 (68.9) | |
| 39 to <49 | 435 (20.8) | 1140 (18.8) | |
| ≥49 | 44 (2.1) | 77 (1.3) | |
| Sex | |||
| Female | 1158 (55.3) | 3151 (52.0) | .009 |
| Male | 935 (44.7) | 2911 (48.0) | |
| Race and ethnicity | |||
| Asian | 115 (5.5) | 391 (6.5) | <.001 |
| Black | 243 (11.6) | 397 (6.6) | |
| Hispanic | 248 (11.9) | 564 (9.3) | |
| White | 1345 (64.3) | 4269 (70.4) | |
| Missing or other | 142 (6.8) | 441 (7.3) | |
| Cardiac cohort | |||
| Parents, No. | 1610 | 4773 | |
| Age, y | |||
| <19 | 2 (0.1) | 0 | .01 |
| 19 to <29 | 165 (10.3) | 535 (11.2) | |
| 29 to <39 | 1072 (66.6) | 3266 (68.6) | |
| 39 to <49 | 339 (21.1) | 907 (19.0) | |
| ≥49 | 31 (1.9) | 65 (1.4) | |
| Sex | |||
| Female | 860 (53.5) | 2943 (52.3) | .41 |
| Male | 749 (46.6) | 2279 (47.8) | |
| Race and ethnicity | |||
| Asian | 98 (6.1) | 307 (6.4) | .005 |
| Black | 153 (9.5) | 325 (6.8) | |
| Hispanic | 152 (9.5) | 421 (8.8) | |
| White | 1109 (68.9) | 3386 (70.9) | |
| Missing or other | 98 (6.1) | 334 (7.0) | |
| Oncologic cohort | |||
| Parents, No. | 2655 | 6502 | NA |
| Age, y | |||
| <19 | 10 (0.4) | 0 | <.001 |
| 19 to <29 | 30 (1.1) | 114 (1.8) | |
| 29 to <39 | 698 (26.3) | 1513 (23.3) | |
| 39 to <49 | 1297 (48.9) | 3154 (48.5) | |
| ≥49 | 620 (23.4) | 1721 (26.5) | |
| Sex | |||
| Female | 1344 (50.6) | 3295 (50.7) | .96 |
| Male | 1311 (49.4) | 3207 (49.3) | |
| Race and ethnicity | |||
| Asian | 159 (6.0) | 381 (5.9) | .12 |
| Black | 114 (4.3) | 363 (5.6) | |
| Hispanic | 279 (10.4) | 667 (10.3) | |
| White | 1969 (74.1) | 4781 (73.5) | |
| Missing or other | 138 (5.2) | 310 (4.8) | |
| Neurologic cohort | |||
| Parents, No. | 5679 | 14 434 | NA |
| Age, y | |||
| <19 | 12 (0.2) | 1 (0.01) | <.001 |
| 19 to <29 | 114 (2.0) | 390 (2.7) | |
| 29 to <39 | 1574 (27.7) | 3910 (27.1) | |
| 39 to <49 | 2651 (46.7) | 6590 (45.7) | |
| ≥49 | 1328 (23.4) | 3543 (24.6) | |
| Sex | |||
| Female | 2879 (50.7) | 7375 (51.1) | .61 |
| Male | 2800 (49.3) | 7059 (48.9) | |
| Race and ethnicity | |||
| Asian | 293 (5.2) | 919 (6.4) | <.001 |
| Black | 316 (5.6) | 863 (6.0) | |
| Hispanic | 659 (11.6) | 1466 (10.2) | |
| White | 4139 (72.9) | 10 580 (73.3) | |
| Missing or other | 273 (4.8) | 606 (4.2) | |
Abbreviation: NA, not applicable.