Table 2.
Demographic and clinical characteristics of the autism spectrum disorder (ASD) cohort and the general population with no ASD diagnosis (POP) cohort, including the composition of their subcohorts describing individuals with and without a gastrointestinal (GI) symptom diagnosed during the late enrollment period (+GI and −no GI subcohorts, respectively). Counts are presented with the column-wise percentage of each cohort/sub cohort given in parentheses.
| Characteristic | Total ASD Cohort |
ASD+GI Subcohort |
ASD–no GI Subcohort |
Total POP Cohort |
POP+GI Subcohort |
POP–no GI Subcohort |
|---|---|---|---|---|---|---|
| Overall | 3253 | 1205 | 2048 | 278370 | 55697 | 222673 |
| Gender | ||||||
| Male | 2651 (81.5%) | 966 (80.2%) | 1685 (82.3%) | 141134 (50.7%) | 27504 (49.4%) | 113630 (51.0%) |
| Female | 602 (18.5%) | 239 (19.8%) | 363 (17.7%) | 137236 (49.3%) | 28193 (50.6%) | 109043 (49.0%) |
| Race / Ethnicity | ||||||
| White | 2468 (75.9%) | 903 (74.9%) | 1565 (76.4%) | 210352 (75.6%) | 40449 (72.6%) | 169903 (76.3%) |
| Asian | 234 (7.2%) | 96 (8.0%) | 138 (6.7%) | 17300 (6.2%) | 3833 (6.9%) | 13467 (6.0%) |
| Black | 232 (7.1%) | 70 (5.8%) | 162 (7.9%) | 21730 (7.8%) | 4149 (7.4%) | 17581 (7.9%) |
| Hispanic | 319 (9.8%) | 136 (11.3%) | 183 (8.9%) | 28988 (10.4%) | 7266 (13.0%) | 21722 (9.8%) |
| Census Division | ||||||
| New England | 126 (3.9%) | 47 (3.9%) | 79 (3.9%) | 8656 (3.1%) | 1596 (2.9%) | 7060 (3.2%) |
| Mid Atlantic | 425 (13.1%) | 166 (13.8%) | 259 (12.6%) | 24084 (8.7%) | 5324 (9.6%) | 18760 (8.4%) |
| East North Central | 443 (13.6%) | 152 (12.6%) | 291 (14.2%) | 45029 (16.2%) | 8084 (14.5%) | 36945 (16.6%) |
| West North Central | 450 (13.8%) | 152 (12.6%) | 298 (14.6%) | 37745 (13.6%) | 6716 (12.1%) | 31029 (13.9%) |
| South Atlantic | 903 (27.8%) | 342 (28.4%) | 561 (27.4%) | 69872 (25.1%) | 15364 (27.6%) | 54508 (24.5%) |
| East South Central | 87 (2.7%) | 39 (3.2%) | 48 (2.3%) | 8674 (3.1%) | 1720 (3.1%) | 6954 (3.1%) |
| West South Central | 361 (11.1%) | 144 (12.0%) | 217 (10.6%) | 41765 (15.0%) | 8818 (15.8%) | 32947 (14.8%) |
| Mountain | 202 (6.2%) | 63 (5.2%) | 139 (6.8%) | 23669 (8.5%) | 4361 (7.8%) | 19308 (8.7%) |
| Pacific | 256 (7.9%) | 100 (8.3%) | 156 (7.6%) | 18763 (6.7%) | 3700 (6.6%) | 15063 (6.8%) |
| Other | 0 (0%) | 0 (0%) | 0 (0%) | 113 (<0.1%) | 14 (<0.1%) | 99 (<0.1%) |
| GI episode during early enrollment period |
1726 (53.1%) | 756 (62.7%) | 970 (47.4%) | 114807 (41.2%) | 30703 (55.1%) | 84104 (37.8%) |