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Table 1 Patient cohort characteristics

From: Influence of cigarette smoking on the human duodenal mucosa-associated microbiota

  Current Previous Never p valuea Overall cohort
Functional dyspepsia/iron deficiency
 Female, n (%) 7 (50) 20 (60.6) 15 (42.9) 0.34b 42 (51.2)
 Age, median (range) 49.1 (28.3–65.5) 62 (20.1–78.6) 45.8 (17.2–77.5) 0.02c,d 54.7 (17.2–78.6)
 BMI, mean (SD) 28.6 (7.6) 27.1 (5.5) 27.1 (6.2) 0.8e 27.3 (6.2)
 Patient—Functional/iron deficiency, n (%) 14 (100)/0 (0) 27 (81.8)/6 (18.2) 26 (74.3)/9 (25.7) 0.11b 67 (81.7)/15 (18.3)
 Current PPI use, n (%) 8 (57.1) 19 (57.6) 19 (54.3) 0.84b 46 (56.1)
 Country of birth—Australia/others, n (%) 9 (64.3)/5 (35.7) 19 (57.6)/14 (42.4) 20 (57.1)/15 (42.9) 0.89b 48 (58.5)/34 (41.5)
Crohn’s disease
 Female, n (%) 5 (71.4) 4 (57.1) 5 (83) 0.59b 14 (70)
 Age, median (range) 36.4 (22.2–57.9) 50.2 (37.5–59.0) 47.5 (22.2–61.9) 0.34c 45.6 (22.2–61.9)
 BMI, mean (SD) 30.2 (7.3) 32.2 (6.9) 26.7 (5.4) 0.46e 30.0 (7.0)
 Current PPI use, n (%) 0 (0) 0 (0) 3 (50) 0.07f 3 (15)
 Country of birth—Australia/others, n (%) 7 (100)/0 (0) 6 (85.7)/1 (14.3) 3 (50)/3 (50) 0.07b 16 (80)/4 (20)
  1. Between smoking status. b p values based on chi-squared test. c p values based on Kruskal-Wallis test. d On Dunn’s multiple comparison test, only Previous vs Never was significantly different (p = 0.03). e p values based on ANOVA. f p values based on Fisher’s exact test. BMI—body mass index. PPI—proton pump inhibitor