Four SNPs (rs13381619, rs9955626, rs1792658, and rs1792671) within SMAD2, one SNP within SMAD3 (rs41473580), two SNPs within SMAD4 (rs7229678 and rs9304407), and one SNP within SMAD7 (rs12956924) were significantly associated with susceptibility only to UC. rs13381619 within SMAD2, rs4147358 within SMAD3, rs9304407 within SMAD4, and rs12956924 within SMAD7 exhibited the strongest association (p < 0.001, p = 0.021, p = 0.005, and p = 0.001, respectively).
Four SNPs (rs13381619, rs9955626, rs1792658, and rs1792671) within SMAD2, one SNP within SMAD3 (rs41473580), two SNPs within SMAD4 (rs7229678 and rs9304407), and one SNP within SMAD7 (rs12956924) were significantly associated with susceptibility only to UC. rs13381619 within SMAD2, rs4147358 within SMAD3, rs9304407 within SMAD4, and rs12956924 within SMAD7 exhibited the strongest association (p < 0.001, p = 0.021, p = 0.005, and p = 0.001, respectively).
Four SNPs (rs13381619, rs9955626, rs1792658, and rs1792671) within SMAD2, one SNP within SMAD3 (rs41473580), two SNPs within SMAD4 (rs7229678 and rs9304407), and one SNP within SMAD7 (rs12956924) were significantly associated with susceptibility only to UC. rs13381619 within SMAD2, rs4147358 within SMAD3, rs9304407 within SMAD4, and rs12956924 within SMAD7 exhibited the strongest association (p < 0.001, p = 0.021, p = 0.005, and p = 0.001, respectively).
Four SNPs (rs13381619, rs9955626, rs1792658, and rs1792671) within SMAD2, one SNP within SMAD3 (rs41473580), two SNPs within SMAD4 (rs7229678 and rs9304407), and one SNP within SMAD7 (rs12956924) were significantly associated with susceptibility only to UC. rs13381619 within SMAD2, rs4147358 within SMAD3, rs9304407 within SMAD4, and rs12956924 within SMAD7 exhibited the strongest association (p < 0.001, p = 0.021, p = 0.005, and p = 0.001, respectively).
Robust case-pseudocontrol (CPC) conditional logistic regression analysis showed associations between CL and SNPs at CTGF (SNP rs6918698; CC genotype; OR 1.67; 95%CI 1.10-2.54; P=0.016), TGFBR2 (rs1962859; OR 1.50; 95%CI 1.12-1.99; P=0.005), SMAD2 (rs1792658; OR 1.57; 95%CI 1.04-2.38; P=0.03), SMAD7 (rs4464148; AA genotype; OR 2.80; 95%CI 1.00-7.87; P=0.05) and FLII (rs2071242; OR 1.60; 95%CI 1.14-2.24; P=0.005), and between ML and SNPs at SMAD3 (rs1465841; OR 2.15; 95%CI 1.13-4.07; P=0.018) and SMAD7 (rs2337107; TT genotype; OR 3.70; 95%CI 1.27-10.7; P=0.016).