Table 3.

Stability of samples up to 14 days after preparation. CV% as calculated from pg observed is calculated from the data corrected by the calibration curve prepared on the day of analysis. CV% as calculated from raw data is not corrected with a calibration curve, but calculated directly from the [peak area cortisol]/[peak area internal standard] results

Samples	Average pg cortisol observed	CV% as calculated from pg observed	CV% as calculated from raw data
Pool A	174	5.0%	2.0%
Pool B	131	4.8%	1.7%
Pool C	156	6.7%	1.4%
Pool D	119	8.6%	3.1%