Table 2.
Proportion of subjects affected by abnormal results in one or more of the three primary tests performed, overall and by age group
| Entire Cohort Mean value (N = 265) |
Ages 1–4 years Mean value N = 113 (%) |
Ages 5–12 years Mean value N = 152 (%) |
|
|---|---|---|---|
| Any of the 3 tests performed | 57 (21.5%) | 22 (23.7%) | 43 (31.2%) |
| Mean age for any abnormality (SD) | 6.17 (3.3) | 2.45 (0.74) | 8.07 (2.32) |
| Prior stroke (N = 265) | 15 (5.7%) | 3 (3%) | 12 (8.5%) |
| Mean age for prior stroke (SD) | 6.4 (2.56) | 2.33 (0.58) | 7.42 (1.62) |
| Elevated TCD (N = 251) | 43 (17.1%) | 17 (18.9%) | 18 (13.6%) |
| Abnormal TCD (N = 5) | 5 (2.0%) | 1 (1%) | 3 (2%) |
| Conditional TCD (N = 38) | 38 (15.1%) | 20 (20%) | 18 (12.3%) |
| Mean age for elevated TCD (SD) | 4.92 (3.18) | 2.38 (0.74) | 7.48 (2.56) |
| Neurocognitive Dysfunction (N = 246) | 27 (11.0%) | 5 (5%) | 22 (15.5%) |
| Mean age for neurocognitive dysfunction (SD) | 8.04 (3.12) | 2.60 (0.89) | 9.27 (1.80) |
One in five participants (57 of 265, 21.5%) had at least one abnormal result in the three tests performed. The most frequent findings were elevated TCD velocity and neurocognitive dysfunction