Midterm outcome of stapled transanal rectal resection for obstructed defecation syndrome: A single-institution experience in China

Table 1 Univariable analysis of predictive factors correlated with therapy success after stapled transanal rectal resection

Factors	Total (n = 75)	Successful (n = 62)	Unsuccessful (n = 13)	P value
Mean age (yr)1	54.30	53.80	56.50	0.287
Multiparous/non-multiparous2	31/44	24/38	7/6	0.314
Hysterectomy/no hysterectomy3	10/65	7/55	3/10	0.364
Anorectal operation before STARR/no operation2	36/39	29/33	7/6	0.643
Constipation scores1
CSS score	15.57	15.60	15.46	0.569
ODS score	18.39	18.03	20.08	0.994
SSS score	13.69	13.55	14.38	0.537
Manometric parameters1
Resting pressure (mmHg)	54.13	54.27	53.46	0.497
Squeeze pressure (mmHg)	109.0	109.5	106.7	0.726
First initial sensation (mL)	87.05	86.53	89.54	0.649
Maximum tolerable rectal volume (mL)	238.2	238.2	238.0	0.248
Defecographic parameters
Rectocele (mm)1	35.12	34.62	37.46	0.220
Intussuception/no intussuception3	65/10	56/6	9/4	0.064
Increased perineal descent/no perineal descent3	21/54	15/47	6/7	0.171
Sigmoidocele/no sigmoidocele3	9/66	7/55	2/11	0.650
Fecal incontinence3
Preoperative incontinence/no incontinence	2/73	0/62	2/11	0.028
Postoperative incontinence/no incontinence	8/67	2/60	6/7	0.000
New-onset incontinence/no incontinence	6/69	2/60	4/9	0.007

¹Unpaired t test;

²Pearson’s χ² test;

³Fisher’s exact test. STARR: Stapled transanal rectal resection; CSS: Constipation scoring system; SSS: Symptom severity score; ODS: Obstructed defecation syndrome.

Table 2 Preoperative and postoperative scores of quality-of-life questionnaires and visual analog scale in 75 patients undergoing stapled transanal rectal resection

Items	Median
	Preoperative	12 mo	30 mo
PAC-QoL (dissatisfaction index)	44	7b	9b
PAC-QoL (satisfaction index)	0	12b	10b
VAS satisfaction index	4	8b	7b

The Wilcoxon signed-rank test was used; All the comparisons vs the preoperative data were statistically significant;

^bP < 0.01. PAC-QoL: Postoperative scores of quality-of-life questionnaires; VAS: Visual analog scales.