Table 2 Comparison of anorectal manometry data in patients of different parities
Characteristics, median (range) | Parity 1 (n = 55) | Parity ≥ 2 (n = 72) | P |
|---|---|---|---|
Rest pressure of the rectum | 26.2 (16.1–43.9) | 31.1 (20.7–49.4) | 0.133 |
Rest pressure of the anal sphincter | 84.3 (66.6-101.8) | 90.6 (64.1-108.6) | 0.576 |
Length of the anal sphincter | 2.3 (1.6–2.7) | 2.3 (1.4–2.5) | 0.234 |
Effective length of the anal sphincter | 1.8 (0.9–2.3) | 1.5 (0.5-2.0) | 0.120 |
First sensation volume | 20.0 (15.0–20.0) | 20.0 (15.0–20.0) | 0.556 |
First threshold for the desire to defecate | 40.0 (30.0–60.0) | 40.0 (40.0–60.0) | 0.923 |
Threshold of defecate distress | 90.0 (60.0-120.0) | 90.0 (60.0-120.0) | 0.875 |
Perception threshold of the maximum volume | 140.0 (115.0-180.0) | 130.0 (120.0-180.0) | 0.802 |
Rectal compliance | 3.8 (2.1–7.3) | 4.0 (2.1–8.6) | 0.829 |
Relaxation rate of the anal sphincter | 8.7 (0.0-23.1) | 5.8 (0.0-20.5) | 0.208 |
Pressure gradient of the rectum-anal sphincter | -42.5 (-67.2–17.2) | -42.5 (-66.1–15.3) | 0.932 |
Maximum squeeze press (MSP) | 106.0 (79.3-125.4) | 108.8 (83.9–141.0) | 0.203 |
Change in contracting sphincter pressure | 16.3 (6.7–25.8) | 15.2 (4.5–27.3) | 0.990 |