Table 2 Sensitivity specificity and predictive values of corrected pregnanediol and P4 by Architect assay single values and two-sample luteal percent increase (confirmatory cohort - ovulation identified by ultrasound). PDG, pregnanediol glucuronide. P4, progesterone.

From: Confirmation of ovulation from urinary progesterone analysis: assessment of two automated assay platforms

Indicator of ovulation Value Sensitivity Specificity Positive predictive value Negative predictive value
PDG follicular to luteal percent-rise, % 195 0.90 0.90 0.90 0.90
P4 follicular to luteal percent-rise, % 165 0.88 0.88 0.87 0.88
PDG threshold value, mmol/mol 1.14 0.89 0.90 0.88 0.91
P4 luteal threshold value, μmol/mol 0.208 0.88 0.90 0.89 0.90