Incidence of first stroke on study (Cooperative Study of Sickle Cell Disease) by age and Hb genotype.
| Age (yr.) . | SS . | SC . | Sβ+ . | Sβo . | Totals . |
|---|---|---|---|---|---|
| * Number Per 100 Patient-Year followup; **Number of cerebrovascular accidents | |||||
| Source: Ohene-Frempong et al. Blood. 1998;91:288-294 | |||||
| < 2 | 0.13* (1)** | 0.00 | 0.00 | 0.00 | 0.08 (1) |
| 2 - 5 | 1.02 (20) | 0.27 (2) | 0.00 | 0.00 | 0.75 (22) |
| 6 - 9 | 0.79 (15) | 0.00 | 0.00 | 0.00 | 0.55 (15) |
| 10 - 19 | 0.41 (15) | 0.09 (1) | 0.00 | 0.00 | 0.30 (16) |
| 20 - 30 | 0.52 (14) | 0.16 (1) | 0.46 (1) | 0.43 (1) | 0.45 (17) |
| 30 - 39 | 0.59 (8) | 0.00 | 0.00 | 0.00 | 0.39 (8) |
| 40 - 49 | 0.74 (3) | 1.01 (2) | 0.00 | 0.00 | 0.76 (5) |
| 50 - | 1.28 (2) | 0.76 (1) | 0.00 | 0.00 | 0.91 (3 |
| OVERALL | 0.61 (78) | 0.17 (7) | 0.11 (1) | 0.10 (1) | 0.46 (87) |
| Age-adjusted | 0.61 | 0.15 | 0.09 | 0.08 | |
| Age (yr.) . | SS . | SC . | Sβ+ . | Sβo . | Totals . |
|---|---|---|---|---|---|
| * Number Per 100 Patient-Year followup; **Number of cerebrovascular accidents | |||||
| Source: Ohene-Frempong et al. Blood. 1998;91:288-294 | |||||
| < 2 | 0.13* (1)** | 0.00 | 0.00 | 0.00 | 0.08 (1) |
| 2 - 5 | 1.02 (20) | 0.27 (2) | 0.00 | 0.00 | 0.75 (22) |
| 6 - 9 | 0.79 (15) | 0.00 | 0.00 | 0.00 | 0.55 (15) |
| 10 - 19 | 0.41 (15) | 0.09 (1) | 0.00 | 0.00 | 0.30 (16) |
| 20 - 30 | 0.52 (14) | 0.16 (1) | 0.46 (1) | 0.43 (1) | 0.45 (17) |
| 30 - 39 | 0.59 (8) | 0.00 | 0.00 | 0.00 | 0.39 (8) |
| 40 - 49 | 0.74 (3) | 1.01 (2) | 0.00 | 0.00 | 0.76 (5) |
| 50 - | 1.28 (2) | 0.76 (1) | 0.00 | 0.00 | 0.91 (3 |
| OVERALL | 0.61 (78) | 0.17 (7) | 0.11 (1) | 0.10 (1) | 0.46 (87) |
| Age-adjusted | 0.61 | 0.15 | 0.09 | 0.08 | |