Performance of the urinary pregnanediol 3-glucuronide (PDG) test with respect to its sensitivity and specificity
| Rules for ovulation confirmation Total # menstrual cycles (n=22) | Menstrual cycle scenarios | |||
| Scenario 1 | Scenario 2 | Scenario 3 | Scenario 4 | |
| First condition | First day luteinising hormone (LH)+ | Fertile peak mucus day | Third day after first LH+ | Third day after peak fertile mucus day |
| # of cycles that met the first condition | 20 | 17 | 20 | 17 |
| Second condition (follows first condition) | Three consecutive daily PDG+ | Three consecutive daily PDG+ | 1 day PDG+ | 1 day PDG+ |
| # of cycles that met the second condition | 17 | 15 | 19 | 15 |
| False positive (# of cycles) | 0 | 0 | 0 | 0 |
| Sensitivity (contingent on both conditions being met) (95% CI) | 85% (62 to 97) | 88% (64 to 99) | 95% (75 to 100) | 88% (64 to 99) |
| Specificity (contingent on both conditions being met) (95% CI) | 100% (81 to 100) | 100% (78 to 100) | 100% (82 to 100) | 100% (78 to 100) |