| Cryopreservation time intervals (days) specimens | |||
---|---|---|---|---|
 | 0 to 30 | 31 to 89 | 90 to 200 | Sum (0 to 200) |
Number of cryopreserved specimens (Number of corresponding fresh blood specimens) | 21 (14) | 20 (20) | 10 (10) | 51 (31) |
Mean a (SD) G6PD activity at Day 0 | 4.57 (4.22) | 4.40 (3.80) | 4.74 (4.05) | 4.10 (3.90) |
Mean b (SD) G6PD activity at thaw date | 4.04 (4.33) | 4.55 (4.68) | 3.91 (3.93) | 3.87 (4.41) |
Mean difference (SD) between Day 0 & thaw date | 0.53 (0.46) | −0.15 (0.31) | 0.84 (0.09) | 0.23 (1.05) |
P value* | <0.001 | 0.629 | <0.001 | 0.233 |