| Final stratified random sample (n = 399) | Cases meeting study criteria (n = 1291) | Cases followed up at 5 years (n = 3412) | CHDS study population (n = 20754) | ||||
---|---|---|---|---|---|---|---|---|
Characteristics* | N | %†| N | % | N | % | N | % |
Maternal age | Â | Â | Â | Â | Â | Â | Â | Â |
   < 20 | 28 | 7 | 68 | 5 | 230 | 7 | 1731 | 9 |
   20–29 | 242 | 61 | 786 | 61 | 2099 | 62 | 12028 | 59 |
   ≥ 30 | 128 | 32 | 436 | 34 | 1068 | 31 | 6724 | 33 |
Parity | Â | Â | Â | Â | Â | Â | Â | Â |
   0 | 122 | 31 | 400 | 31 | 1077 | 32 | 6289 | 31 |
   1–2 | 177 | 44 | 605 | 47 | 1572 | 47 | 9270 | 45 |
   ≥ 3 | 100 | 25 | 286 | 22 | 717 | 21 | 5031 | 24 |
Race/ethnicity | Â | Â | Â | Â | Â | Â | Â | Â |
   White | 194 | 49 | 648 | 50 | 1970 | 58 | 1347 | 66 |
   African-American | 165 | 41 | 496 | 38 | 1041 | 31 | 4936 | 24 |
   Hispanic | 7 | 2 | 40 | 3 | 130 | 4 | 678 | 3 |
   Asian | 20 | 5 | 70 | 5 | 150 | 4 | 783 | 4 |
   Multi-racial/other | 13 | 3 | 37 | 3 | 108 | 3 | 597 | 3 |
Mother's education | Â | Â | Â | Â | Â | Â | Â | Â |
   Not High School graduate | 76 | 19 | 208 | 16 | 500 | 17 | 3341 | 19 |
   High School graduate | 160 | 40 | 484 | 38 | 1118 | 37 | 6661 | 38 |
   Some college | 163 | 41 | 599 | 46 | 1378 | 46 | 7549 | 43 |
Father's education | Â | Â | Â | Â | Â | Â | Â | Â |
   Not High School graduate | 74 | 19 | 211 | 20 | 496 | 17 | 2997 | 18 |
   High School graduate | 111 | 29 | 339 | 32 | 789 | 27 | 4607 | 28 |
   Some college | 122 | 32 | 431 | 41 | 979 | 34 | 4329 | 26 |
   College grad/RN | 76 | 20 | 286 | 27 | 643 | 22 | 4681 | 28 |
Sex of infant | Â | Â | Â | Â | Â | Â | Â | Â |
   Female | 213 | 53.4 | 658 | 51.0 | 1722 | 50.5 | 9451 | 48.8 |
   Male | 186 | 46.6 | 633 | 49.0 | 1690 | 49.5 | 9927 | 51.2 |