Table 4. Predictor variables for 454 SNP data (failed/successful), backward stepwise elimination.
| Ba | Waldb | df | Pc | |
| SNP_score | 1.735 | 14.607 | 1 | 0.000 |
| I_E_test(1) | −0.361 | 6.545 | 1 | 0.011 |
| MSAF | 1.415 | 5.418 | 1 | 0.020 |
| Individuals | 0.075 | 2.919 | 1 | 0.088 |
| Q | −0.007 | 5.205 | 1 | 0.023 |
| Constant | −2.339 | 13.067 | 1 | 0.000 |
a
Regression coefficient for individual variable,
b
Wald χ2 statistic,
c
associated probability. (e.g. average SNP_score for successful SNPs is 0.794, whereas mean SNP_score is 0.759 for “failed” assays).