Table 1 GAA enzyme activity intra- and interday assays using DBS from low to high quality controls (QCs)
From: Diagnosis of late-onset Pompe disease and other muscle disorders by next-generation sequencing
|  | Intraday assays (n = 5) | |||
| Â | QC1 | QC2 | QC3 | QC4 |
Mean (μmol/h/L) | 0.28 | 0.84 | 6.79 | 13.67 |
Range (μmol/h/L) | 0.20–0.49 | 0.75–0.89 | 6.20–7.64 | 11.50–15.83 |
RSD% | 41.42 | 6.44 | 8.70 | 12.79 |
|  | Interday assays (n = 5) | |||
| Â | QC1 | QC2 | QC3 | QC4 |
Mean (μmol/h/L) | 0.33 | 1.00 | 7.29 | 13.70 |
Range (μmol/h/L) | (0.17–0.53) | (0.69–1.44) | (6.85–7.69) | (12.08–15.09) |
RSD% | 38.75 | 27.17 | 4.22 | 9.37 |