From:  Multiple abnormalities of anorectal physiology co-exist with dyssynergia in patients with functional defecatory disorder—an observational study based on the London classification

 Baseline demographic and manometric parameters of study participants.

Parameters (n = 100)Value/Frequency
Age (year, median [IQR])34 (18–78)
Sex (n, %)
Male64 (64%)
Female36 (36%)
Comorbidities (n, %)
Systemic hypertension21 (21%)
COPD8 (8%)
Dyslipidemia16 (16%)
Coronary artery disease4 (4%)
Rao’s type of dyssynergia (n, %)
Type 179 (79%)
Type 21 (1%)
Type 319 (19%)
Type 41 (1%)
Duration of illness (years)5 (1–20)
Anal resting pressure (mmHg)61.5 (51–71.3)
Anal squeeze pressure (mmHg)146 (116–175)
Anal pressure during strain (mmHg)77.1 (63.5–95.5)
Rectal basal pressure (mmHg)8.8 (6.0–12.1)
Rectal pressure during strain (mmHg)50 (39.4–60.6)
Rectal pressure increment during strain (mmHg)43.4 (33.9–57.5)
Anal pressure decrement during strain (mmHg)–13.2 (–30.9 to –2)
First sensation (mL)30 (20–40)
Urge for defecation (mL)120 (100–170)
Discomfort (mL)180 (160–220)

IQR: interquartile range; COPD: chronic obstructive pulmonary disease.