Table 2.
Distribution of observations within two-year age groups, by cohort.
| Age Group | ||||||
|---|---|---|---|---|---|---|
| Cohort | 8 - 9 | 10 - 11 | 12 - 13 | 14 - 15 | 16 - 17 | Total |
| Bogalusa | 642 | 777 | 968 | 856 | 784 | 4027 |
| HeartBeat | 1371 | 1524 | 922 | 957 | 491 | 5265 |
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