| Anal sphincter | Range | Median |
| Resting pressure | 30–163 cm H2O | 109 cm H2O |
| Cough pressure increase | 39–305 cm H2O | 143 cm H2O |
| Voluntary squeeze pressure | 50–922 cm H2O | 275 cm H2O |
| Endurance squeeze time | 18–125 s | 52 s |
| % of relaxation during pushdown | 0–42% (17/20 relaxed) | 14% |