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Table 2 Patient demographics, cancer etiology, and stricture morphology (N = 113)

From: A newly designed uncovered biliary stent for palliation of malignant obstruction: results of a prospective study

CharacteristicN (%)
Age, years
 Mean ± standard deviation (range)68.8 ± 12.2 (33–93)
Gender
 Male73 (64.6)
 Female40 (35.4)
Race/Ethnicity
 White97 (85.8)
 Black or African American9 (8.0)
 Hispanic or Latino6 (5.3)
 Asian1 (0.9)
Tumor type
 Pancreatic cancer79 (69.9)
 Cholangiocarcinoma13 (11.5)
 Gallbladder cancer2 (1.8)
 Gastric cancer2 (1.8)
 Ampullary carcinoma1 (0.9)
 Duodenal carcinoma1 (0.9)
 Othera15 (13.3)
Total bilirubin (mg/dL)b
 Mean ± standard deviation (N, range)8.3 ± 7.8 (102, 0.1–37.5)
Stricture morphology
 Stricture location
  Extrahepatic104 (92.0)
  Intrahepatic4 (3.5)
  Both intrahepatic and extrahepatic5 (4.4)
 Stricture length (cm)
  Mean ± standard deviation (range)2.3 ± 1.2 (0.8–8.0)
 TNM Stagec
  T10/105 (0.0)
  T210/105 (9.5)
  T364/105 (61.0)
  T431/105 (29.5)
  N033/103 (32.0)
  N154/103 (52.4)
  N210/103 (9.7)
  N36/103 (5.8)
  M057/100 (57.0)
  M143/100 (43.0)
  1. a The majority of other tumor types are metastases
  2. b Collection of total bilirubin was not standard of care at all medical centers; therefore, data were not collected for 11 patients
  3. C T stage information not available for 8 patients, N stage not available for 10 patients, M state not available for 13 patients