Table 3.
Upper Confidence Limits on Serum Testosterone in Women With PCOS
| Confidence Interval | Likelihooda | SDb | One-Sidedc | Two-Sidedc |
|---|---|---|---|---|
| 95% | 1:20 | 1.96 | 3.13 | 3.39 |
| 99% | 1:100 | 2.35 | 3.47 | 3.73 |
| 99.9% | 1:1000 | 3.10 | 4.21 | 4.39 |
| 99.99% | 1:10,000 | 3.72 | 4.77 | 4.95 |
a
Likelihood that a woman with PCOS would exceed that limit by chance.
b
Number of SDs for each confidence limit.
c
Two-sided CIs are conventional for a result that could exceed or fall below confidence limits, but here we focus only on values exceeding the upper limit, so that one-sided confidence limits are appropriate.