TABLE 1.
Number and characteristics of participating children and contributing cohorts by US region
| Overall | Northeast | South | Midwest | West | |
|---|---|---|---|---|---|
| Number of children | 14,313 | 3,407 | 5,912 | 2,562 | 2,432 |
| Number of cohorts | 25 | 12 | 17 | 13 | 13 |
| Birth year | |||||
| <2005 | 3,841 (27%) 8 cohorts | 2,370 (70%) 5 cohorts | 840 (14%) 4 cohorts | 544 (21%) 4 cohorts | 87 (4%) 3 cohorts |
| ≥2005 | 10,472 (73%) 21 cohorts | 1,037 (30%) 9 cohorts | 5,072 (86%) 14 cohorts | 2,018 (79%) 11 cohorts | 2,345 (96%) 12 cohorts |
| Sex at birth | |||||
| Male | 7,333 (51%) 25 cohorts | 1,770 (52%) 11 cohorts | 2,999 (51%) 16 cohorts | 1,310 (51%) 11 cohorts | 1,254 (52%) 13 cohorts |
| Female | 6,980 (49%) 25 cohorts | 1,637 (48%) 12 cohorts | 2,913 (49%) 15 cohorts | 1,252 (49%) 12 cohorts | 1,178 (48%) 11 cohorts |
| Race and ethnicity | |||||
| Non-Hispanic White | 7,342 (51%) 21 cohorts | 1,676 (49%) 10 cohorts | 2,482 (42%) 10 cohorts | 1,914 (75%) 11 cohorts | 1,270 (52%) 11 cohorts |
| Non-Hispanic Black | 2,360 (16%) 20 cohorts | 531 (16%) 9 cohorts | 1,509 (26%) 10 cohorts | 132 (5%) 8 cohorts | 188 (8%) 7 cohorts |
| Hispanic White | 871 (6%) 22 cohorts | 207 (6%) 10 cohorts | 298 (5%) 11 cohorts | 40 (2%) 6 cohorts | 326 (13%) 10 cohorts |
| Hispanic Black | 153 (1%) 14 cohorts | 94 (3%) 7 cohorts | 37 (<1%) 6 cohorts | <5 (<1%) 1 cohort | 21 (<1%) 4 cohorts |
| Other | 3,587 (25%) 24 cohorts | 899 (26%) 11 cohorts | 1,586 (27%) 16 cohorts | 475 (19%) 9 cohorts | 627 (26%) 12 cohorts |
| Hispanic ethnicity | |||||
| Not Hispanic | 11,029 (77%) 23 cohorts | 2,425 (71%) 11 cohorts | 4,462 (75%) 14 cohorts | 2,405 (94%) 11 cohorts | 1,737 (71%) 11 cohorts |
| Hispanic | 2,016 (14%) 23 cohorts | 772 (23%) 10 cohorts | 689 (12%) 13 cohorts | 105 (4%) 8 cohorts | 450 (19%) 11 cohorts |
| Unknown | 1,268 (9%) 14 cohorts | 210 (6%) 7 cohorts | 761 (13%) 5 cohorts | 52 (2%) 2 cohorts | 245 (10%) 5 cohorts |
| Birth weight in grams, mean (SD) | |||||
| Overall | 3,417 (476) 25 cohorts | 3,501 (488) 12 cohorts | 3,397 (472) 17 cohorts | 3,500 (472) 13 cohorts | 3,294 (437) 13 cohorts |
| Male | 3,478 (485) 25 cohorts | 3,569 (500) 11 cohorts | 3,460 (479) 16 cohorts | 3,558 (481) 11 cohorts | 3,349 (443) 13 cohorts |
| Female | 3,351 (457) 25 cohorts | 3,428 (464) 12 cohorts | 3,333 (456) 15 cohorts | 3,437 (453) 12 cohorts | 3,229 (421) 11 cohorts |
| Maternal education | |||||
| Less than high school | 1,096 (8%) 17 cohorts | 215 (6%) 8 cohorts | 469 (8%) 10 cohorts | 136 (5%) 7 cohorts | 276 (11%) 8 cohorts |
| High school | 1,625 (11%) 8 cohorts | 148 (4%) 4 cohorts | 1,061 (18%) 4 cohorts | 185 (7%) 3 cohorts | 231 (9%) 3 cohorts |
| Some college | 2,096 (15%) 10 cohorts | 759 (22%) 5 cohorts | 595 (10%) 3 cohorts | 433 (17%) 2 cohorts | 309 (13%) 5 cohorts |
| College degree and above | 3,749 (26%) 11 cohorts | 815 (24%) 5 cohorts | 1,171 (20%) 7 cohorts | 943 (37%) 3 cohorts | 820 (34%) 5 cohorts |
| Missing | 5,747 (40%) 23 cohorts | 1,470 (43%) 12 cohorts | 2,616 (44%) 13 cohorts | 865 (34%) 11 cohorts | 796 (33%) 10 cohorts |
| Child BMI z score, mean (SD) | 0.23 (1.45) | 0.37 (1.34) | 0.25 (1.59) | 0.36 (1.51) | −0.03 (1.37) |
Number of cohorts in each region (12 in the Northeast, 17 in the South, 13 in the Midwest, 13 in the West) exceeded the total number of cohorts (n = 25) because 14 cohorts enrolled children from multiple US Census regions.