Table 3 . Comparison between in two groups based on frequency and volume of transfusion .
| Variable value | Group | Mean | Number | Std Deviation | Min | Max | Sig (2-tailed) |
| Numbers of phlebotomy | First | 25/86 | 71 | 17/28 | 4 | 93 | 0/11 |
| Second | 32/84 | 56 | 29/84 | 3 | 142 | ||
| Volume of phlebotomy during admission(cc) | First | 46/30 | 71 | 26/57 | 13 | 150 | 0/17 |
| Second | 54/27 | 56 | 39/15 | 13 | 190 | ||
| Mean volume of blood | First | 18/85 | 71 | 7/86 | 5 | 40 | 0/47 |
| transfusion(cc) | Second | 19/79 | 56 | 7/40 | 7 | 40 | |
| Numbers of transfusion | First | 2/94 | 71 | 2/85 | 1 | 13 | 0/94 |
| Second | 2/98 | 56 | 3/52 | 1 | 18 | ||
| Mechanical ventilation time(days) | First | 11/85 | 41 | 14/00 | 1 | 70 | 0/30 |
| Second | 9/1 | 45 | 10/40 | 1 | 47 | ||
| hospitalization time(day) | First | 28/68 | 71 | 19/24 | 2 | 94 | 0/11 |
| Second | 23/50 | 62 | 18/44 | 1 | 67 |