Table 4 Predictive validity of currently HbA2 normal range in western Kenya
| Â | Current HbA2 normal ranges | Total | Predictive values | ||
|---|---|---|---|---|---|
1.5–3.5 (positive) | < 1.5 (negative) | ||||
Western Kenya HbA2 ranges | 1.8–4.2 (positive) | 365 | 1 | 366 | 99.7% (+) |
< 1.8 (negative) | 6 | 14 | 20 | 70.0% (−) | |
Total | 371 | 15 | 386 | Â | |