Table 1 Characteristics of the analytic and excluded age-eligible sample born between October 1, 1979 and June 30, 1994
Characteristic | Analytic sample | Excluded sample |
|---|---|---|
Child-level | Â | Â |
   Total # of children | 3289 | 139057 |
   Sex, n (%) |  |  |
Boys | 1680 (51.1) | 70216 (50.5) |
Girls | 1609 (48.9) | 68841 (49.5) |
   Race/ethnicity, n (%) |  |  |
White | 2362 (71.8) | 59644 (42.9) |
Black | 214 (6.5) | 14341 (10.3) |
Other | 168 (5.1) | 7847 (5.6) |
Unknown | 503 (15.3) | 52443 (37.7) |
   Year of birth, n (%) |  |  |
1979 ~ 1984 | 382 (11.6) | 38343 (27.6) |
1985 ~ 1989 | 1315 (40.0) | 48075 (34.6) |
1990 ~ 1994 | 1592 (48.4) | 52639 (37.9) |
   Birth weight in grams, mean (SD) | 3442 (488) | 3433 (507) |
   Type of health insurance, % |  |  |
Medicaid | 129 (3.9) | 7,256 (5.2) |
Non-Medicaid | 3160 (96.1) | 131801 (94.8) |
Visit-level | Â | Â |
   Total # of visits | 81550 | 993687 |
   Age at visit (years), n (%) |  |  |
0 ~ 1 | 25188 (30.9) | 294540 (29.6) |
2 ~ 5 | 17501 (21.5) | 215744 (21.7) |
6 ~ 10 | 16681 (20.5) | 175422 (17.7) |
11 ~ 14 | 12974 (15.9) | 164369 (16.5) |
15 ~ 18 | 9206 (11.3) | 143612 (14.5) |