Research Article

NUDT15 Haplotypes and Diplotypes Predict Thiopurine-Induced Leukopenia and the Influence of Prolonged Exposure to Azathioprine on Hematologic Indices in Patients with Inflammatory Bowel Diseases

Table 1

Clinical characteristics and adverse events of patients.

CharacteristicsNUDT15 wild type (n = 58)NUDT15 mutant type (n = 22)Total (n = 80) value

Sex (male/female)40/1815/755/250.946
Age (yr), M(R)31.5 (17–78)30.5 (18–58)31 (17–78)0.385
Disease type
 CD/UC52/621/173/70.667
AZA final dosage (mg·kg−1·d−1), M(R)1.36 (0.56–2.5)1.02 (0.35–2.0)1.23 (0.35–2.5)0.013
AZA duration (wk), M(R)48 (4–288)46 (1–336)48 (1–336)0.159
Concomitant therapy4614600.148
 5-ASA131140.097
 Steroids288360.339
 IFX76130.171
 Thalidomide101110.274
Montreal classification of CD5221730.667
 Age range at diagnosis (A1/A2/A3)0/38/140/17/40/55/180.48
 Disease location (L1/L2/L3/L4)21/3/28/74/1/16/225/4/44/90.305
 Disease behavior (B1/B2/B3/P)26/22/6/2814/5/2/940/27/8/370.485
Disease extension of UC (E1/E2/E3)0/0/60/0/10/0/7
Adverse events (%)16 (27.6)15 (68.1)31 (38.8)0.002
 Leukopenia9 (15.5)12 (54.6)21 (26.2)4×104
 Hepatotoxicity1 (1.7)0 (0)1 (1.3)1
 Acute pancreatitis1 (1.7)1 (4.5)2 (2.5)0.477
 Rash3 (5.1)1 (4.5)4 (5.0)1
 Gastrointestinal side effects2 (3.4)0 (0)2 (2.5)1
 Alopecia0 (0)1 (4.5)1 (1.3)0.275

The values in bold in the table are less than 0.05.