Table 2 DNA yield from standard extraction among 2005 and 2008 DBS samples (n = 84)
2005 | 2008 | p-value | |
|---|---|---|---|
Samples with insufficient DNA signal (n) | 79.2% (42/53) | 100% (31/31) | <0.0005 |
Mean DNA concentration (ng/μL) in extracts [95% CI] | 0.0003068 | 0.000042 | <0.0005 |