TABLE 2
FROM:
Aging of registered stem cell donors: implications for donor recruitment
A H Schmidt, L Biesinger, D Baier, P Harf and C Rutt
BACK TO ARTICLETable 2. Calculated annual donation probabilities per 100 donors by donor age for the donor sets G(j,k,l) and results of 
2-tests
| Donor set | Size | 18–29 years | 30–44 years |
 45 years
| |||
|---|---|---|---|---|---|---|---|
| Donation probability | P-value ( 2-test)
| Donation probability | P-value (2-test)
| Donation probability | P-value (2-test)
| ||
| G(1,1,1) | 190 933 | 0.51 | NA | 0.33 | <0.001 | 0.20 | <0.001 |
| G(1,1,0) | 3818 | 0.06 | NA | 0.48 | <0.001 | 0 | NS* |
| G(1,0,1) | 303 306 | 0.29 | NA | 0.19 | <0.001 | 0.04 | <0.001 |
| G(1,0,0) | 46 748 | 0.05 | NA | 0.08 | NS | 0.04 | 0.02 |
| G(0,1,1) | 173 321 | 0.19 | NA | 0.10 | <0.001 | 0.07 | NS |
| G(0,1,0) | 3696 | 0.12 | NA | 0.57 | 0.001 | 0.34 | NS |
| G(0,0,1) | 437 960 | 0.11 | NA | 0.04 | <0.001 | 0.01 | <0.001 |
| G(0,0,0) | 56 025 | 0.03 | NA | 0.04 | NS | 0.03 | NS |
Abbreviations: NA=not applicable; NS=not significant.
Notation of donor sets is defined in the Methods section. 
2-Tests were used to compare adjacent age intervals within the various groups. For example, P-values in the 30–44 years column indicate results of
2-tests comparing age intervals 18–29 and 30–44. The P-value marked with (*) has been calculated using Fisher's exact test since the preconditions of the
2-test were not fulfilled.
