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Table 2 Characteristics of the foreign bodies in the upper gastrointestinal tract

From: Clinical outcomes of endoscopic removal of foreign bodies from the upper gastrointestinal tract

  Total
(N = 853)
Inland area
(n = 412)
Coastal area
(n = 441)
p value
Location     0.038
 Pharynx 46 (5.4) 17 (4.1) 29 (6.6)  
 Esophagus 744 (87.2) 355 (86.2) 389 (88.2)  
  Upper 509 (68.2) 206 (57.7) 303 (77.9)  
  Middle 137 (18.4) 96 (26.9) 41 (10.5)  
  Lower 100 (13.4) 55 (15.4) 45 (11.6)  
 Stomach 30 (3.5) 19 (4.6) 11 (2.5)  
 Duodenum 8 (0.9) 4 (1.0) 4 (0.9)  
 Jejunum 1 (0.1) 0 (0) 1 (0.2)  
 Anastomosis site 24 (2.8) 17 (4.1) 7 (1.6)  
Type of foreign body     < 0.001
 Fish bone 431 (50.5) 165 (40.0) 266 (60.3)  
 Food bolus 140 (16.4) 80 (19.4) 60 (13.6)  
 Shell 67 (7.9) 42 (10.2) 25 (5.7)  
 Animal bone 56 (6.6) 34 (8.3) 22 (5.0)  
 Drug package 50 (5.9) 29 (7.0) 21 (4.8)  
 Beans or nuts 29 (3.4) 17 (4.1) 12 (2.7)  
 Metal 19 (2.2) 12 (2.9) 7 (1.6)  
 Stone 14 (1.6) 7 (1.7) 7 (1.6)  
 Dental prosthesis 18 (2.1) 12 (2.9) 6 (1.4)  
 Others§ 29 (3.4) 14 (3.4) 15 (3.4)  
Sharpness 632 (74.1) 288 (69.9) 344 (78.0) 0.007
  1. §Including batteries, coins, pencils, glass fragments, buttons, toothbrushes, and plastic materials