Table 2.
Changes in the parameters of anorectal manometry in patients before and after radiotherapy evaluated with a paired t test
| Variable | Pre-RT | Post-RT | Pre-RT–Post-RT (Δmean) | p-value |
|---|---|---|---|---|
| Resting anal pressure (mm Hg) | 104.0±61.0 | 82.2±41.1 | 21.8 | 0.001 |
| Squeeze anal pressure (mm Hg) | 181.5±82.5 | 142.8±57.6 | 38.7 | < 0.001 |
| Perception threshold volume (mL) | 24.4±9.6 | 23.7±10.3 | 0.7 | 0.376 |
| Urge to defecate volume (mL) | 195.4±58.9 | 181.5±51.1 | 13.9 | 0.025 |
| Anal canal length (cm) | 3.6±0.6 | 3.6±0.6 | 0 | 0.411 |
| IASP (mm Hg)a) | 54.3±18.2 | 53.9±18.2 | 0.4 | 0.939 |
| Resting EASP (mm Hg) | 88.8±35.6 | 87.6±39.4 | 1.2 | 0.824 |
| Maximum EASP (mm Hg) | 198.2±90.4 | 194.1±83.7 | 4.1 | 0.619 |
Values are presented as mean±standard deviation. RT, radiotherapy; IASP, internal anal sphincter pressure; EASP, external anal sphincter pressure.
a)
Evaluation was performed only in 38 patients due to missing values.