TABLE 2.
Variability of tests on three replicate samples included in each shipment
| Laboratory | CV (%)a for assay of:
|
||||
|---|---|---|---|---|---|
| TNF-α | IFN-γ | IL-2 | IL-10 | RANTES | |
| A | −/41/21 | −/15/8 | /136/ | ||
| B | 33// | −// | |||
| C | 5/11/5,8 | 50/3/3 | //38 | /10/10 | //6 |
| D | −/12/8 | −/15/5 | /−/− | /9/10 | /2/8 |
| E | 25// | ||||
| F | −// | −/7/ | |||
| G | 29//3 | 19//22,− | 46//22 | ||
| H | −// | −// | |||
| I | //6 | /12/2 | |||
| J | /−/ | /47/ | |||
| K | //12 | /11/11 | /25/19 | /15,27/6 | |
| L | //− | //48 | |||
a
Results are presented as coefficients of variation (CV) for all three shipments (first/second/third). −, analyte was tested but not detectable. The absence of number indicates that test was not done. For example, laboratory A, did not detect TNF-α in the replicates in the first shipment but did in the second (with a CV of 41%) and in the third (with a CV of 21%). Laboratory B did test TNF-α in the first shipment but did not in the second and third shipments.