Table 2 Comparison of postoperative outcomes between the two groups of patients.

From: Efficacy of transanal drainage tubes in postoperative anastomotic leakage in patients with laparoscopic anterior rectal resection without diverting stoma

Variables

Before PSM

After PSM

No-TDT group

TDT group

P

No-TDT group

TDT group

P

Time of TDT (days)

No value

4.8 ± 1.2

No value

No value

4.7 ± 1.2

No value

Anastomotic leakage

  

0.159

  

0.034

 No

582 (93.9)

295 (96.2)

 

264 (92.0)

276 (96.2)

 

 Yes

38 (6.1)

12 (3.9)

 

23 (8.0)

11 (3.8)

 

Anastomotic leakage Grade

  

0.874

  

0.709

 Grade B

18 (47.4)

6 (50.0)

 

8 (34.8)

5 (45.5)

 

 Grade C

20 (52.6)

6 (50.0)

 

15 (65.2)

6 (54.5)

 

Anastomotic bleeding

  

0.182

  

0.279

 No

610 (98.4)

298 (97.1)

 

282 (98.3)

278 (96.9)

 

 Yes

10 (1.6)

9 (2.9)

 

5 (1.7)

9 (3.1)

 

Intestinal obstruction

  

0.182

  

1.000

 No

599 (96.6)

298 (97.1)

 

279 (97.2)

279 (97.2)

 

 Yes

21 (3.4)

9 (2.9)

 

8 (2.8)

8 (2.8)

 

Time of anal gas evacuation (days)

2.4 ± 1.7

2.4 ± 1.0

0.981

2.4 ± 1.6

2.4 ± 1.0

0.488

Time of return to regular diet (days)

3.7 ± 1.9

3.7 ± 1.2

0.912

3.7 ± 1.8

3.7 ± 1.2

0.435

Length of postoperative hospitalization (days)

9.1 ± 5.1

9.3 ± 4.0

0.368

9.5 ± 6.2

9.3 ± 4.0

0.333

  1. TDT, transanal drainage tube.
  2. PSM, propensity-score matched; TDT, transanal drainage tube; BMI, body mass index; CEA, carcinoembryonic antigen; CA19-9, carbohydrate antigen 19–9; DTAV, distance to the anal verge.