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Table 1 Demographic and perioperative characteristics

From: Long term outcome of anastomotic leakage in patients undergoing low anterior resection for rectal cancer

N (%) Overall population Symptomatic AL (SAL) Asymptomatic AL (AAL) Without AL (WAL) P
200 (100) 29 (14.5) 10 (5.0) 161 (80.5)
Age (years). median ± IQR 67 (59–73) 67 (58–73) 70 (67–78) 66 (59–73)  
≥ 60 years. n (%) 145 (72.5) 21 (72.4) 8 (80.0) 116 (72.0) 0.526
<  60 years. n (%) 55 (27.5) 8 (27.6) 2 (20.0) 45 (28.0)  
Sex ratio (Female/Male) 65/135 7/22 3/7 55/106 0.561
BMI (kg/m2). median ± IQR 24 (23–28) 24 (23–26) 30 (25–34) 24 (23–27) 0.017
ASA Score. n (%)
 1 107 (53.5) 16 (55.2) 2 (20.0) 89 (55.3)  
 2 79 (39.5) 11 (37.9) 7 (70.0) 61 (37.9) 0.306
 3 14 (7.0) 2 (6.9) 1 (10.0) 11 (6.8)  
Arteriopathy. n (%) 16 (8.0) 2 (6.9) 2 (20.0) 12 (7.5) 0.355
Diabetes. n (%) 23 (11.4) 4 (13.8) 1 (10.0) 18 (11.2) 0.862
Tumor diagnosis. n (%)
 Screening test 41 (20,5) 8 (27.6) 1 (10.0) 32 (19.9) 0.447
 Symptoms 159 (79.5) 21 (72.4) 9 (90.0) 129 (80.1)  
Rectal adenocarcinoma location, n (%)
 Upper (10–15 cm) 53 (26.5) 5 (17.2) 1 (10.0) 47 (29.2)  
 Mid (5–10 cm) 105 (52.5) 18 (62.1) 8 (80.0) 79 (49.1) 0.308
 Low (2–5 cm) 42 (21.0) 6 (20.7) 1 (10.0) 35 (21.7)  
Neoadjuvant radiation therapy, n (%)
 Long-course radiotherapy (with chemotherapy) 138 (69,0) 19 (65.5) 8 (80.0) 111 (68.9)  
 Short-course radiotherapy (without chemotherapy) 12 (6.0) 2 (6.9) 0 10 (6.2) 0.855
 None 50 (25.0) 8 (27.6) 2 (20.0) 40 (24.8)  
  1. AL Anastomotic leak, SAL symptomatic AL, AAL asymptomatic AL and WAL without AL; ASA American Society of Anesthesiologists, BMI body mass index, IQR interquartile range