Table 2. Frequency distribution according to the characteristics of disease in the intervention and control groups .
| Intervention | Control | |||
| N (%) | N (%) | |||
| Chelation drug | ||||
| Subcutaneous | 34 (73.9) | 32 (71.1) | ||
| Oral | 10 (21.7) | 4 (8.9) | ||
| Both of them | 2 (4.3) | 9 (20) | ||
| Chi-square | P=0.02 | |||
| Frequency of blood transfusion a month | ||||
| Once | 7 (15.2) | 8 (17.8) | ||
| Twice | 39 (84.8) | 37 (82.2) | ||
| Mann-Whitney | P=0.74 | |||
| Splenectomy | ||||
| Yes | 8 (17.4) | 15 (33.3) | ||
| No | 38 (82.6) | 30 (66.7) | ||
| Chi-square | P=0.08 | |||
| History of the Thalassemia In the family | ||||
| Yes | 19 (41.3) | 23 (51.1) | ||
| No | 27 (58.7) | 22 (48.9) | ||
| Chi-square | P=0.34 |