Research Article

QuantiFERON-TB Gold Test Conversion Is Associated with Active Tuberculosis Development in Inflammatory Bowel Disease Patients Treated with Biological Agents: An Experience of a Medical Center in Taiwan

Table 1

Clinical characteristics of patients with inflammatory bowel disease.

CharacteristicsTotal IBD ()CD ()UC () value (CD vs. UC)

Male gender, (%)97 (75)54 (76)43 (73)0.832
Diagnostic mean age (years) (SD)37.18 (15.96)36.18 (17.46)38.37 (14.01)0.429
Mean age at biological agent (years) (SD)41.12 (15.91)39.18 (16.81)43.44 (14.56)0.124
Mean follow-up period (months) (SD)32.1 (24.19)44.15 (25.28)17.59 (11.74)<0.001
BMI (kg/m2), mean (SD)21.8 (4.07)21.09 (3.92)22.69 (4.11)0.028
Smoking
 No smoking, (%)84 (65)43 (61)41 (69)0.381
 Ex-smoking and current smoking, (%)46 (35)28 (39)18 (31)
Alcohol
 No drinking, (%)110 (85)62 (87)48 (81)0.487
 Ex-drinking and current drinking, (%)20 (15)9 (13)11 (19)
Family history of IBD, (%)2 (2)0 (0)2 (3)0.204
Albumin (g/dL), mean (SD)3.96 (0.66)3.84 (0.65)4.12 (0.66)0.027
CRP (mg/dL), mean (SD)1.9 (3.99)2.18 (3.95)1.6 (4.05)0.429
ESR (mm/hour), mean (SD)21.65 (23.06)24.91 (26.38)18.51 (19.04)0.142
Comorbidity
 HBV carrier, (%)15 (12)8 (11)7 (12)1.000
 Old TB1 (1)1 (1)0 (0)1.000
Conventional medicines
 Steroids, (%)107 (82)57 (80)50 (85)0.665
 5-ASAs, (%)125 (96)66 (93)59 (100)0.063
 Immunomodulators, (%)73 (56)48 (68)25 (42)0.007
Biological agent selection
 Adalimumab, (%)124 (95)69 (97)55 (93)0.410
 Infliximab, (%)7 (5)6 (8)1 (2)0.126
 Vedolizumab, (%)11 (8)6 (8)5 (8)1.000
 Golimumab, (%)2 (2)0 (0)2 (3)0.204

5-ASAs: 5-aminosalicylic acids; BMI: body mass index; CD: Crohn’s disease; CRP: C-reactive protein; ESR: erythrocyte sedimentation rate; HBV: hepatitis B virus; IBD: inflammatory bowel disease; TB: tuberculosis; UC: ulcerative colitis.