Abstract:Objective The relationship between serum 25-hydroxyvitamin D3[25(OH)D3], minimal ribonucleic acid-25-3p (miR-25-3p), and chitosaccharidase 3-like protein 1 (CHI3L1) and the degree of liver fibrosis and liver function of chronic hepatitis B were analyzed. Methods 106 patients with chronic hepatitis B treated in our hospital from December 2021 to December 2022 were selected and divided into grade 0-1 group (30 cases), grade 2-3 group (41 cases) and grade 4-6 group (35 cases) according to the degree of liver fibrosis (Ishak scoring system). According to the liver function of the patients (using ChildPugh classification), they were divided into A group (26 cases), B group (42 cases) and C group (38 cases). The values of 25(OH)D3, miR-25-3p, CHI3L1, spleen hardness and liver hardness in different liver fibrosis groups were compared, and the values of 25(OH)D3, miR-25-3p, CHI3L1, liver fibrosis degree grade, spleen hardness and liver hardness were compared in different liver function groups. Results The values of miR-25-3p, CHI3L1, spleen hardness and liver hardness in different liver fibrosis degree groups were compared, grade 0-1 group <2-3 group <4-6 group (P<0.05), and 25(OH)D3 was compared, grade 0-1 group >2-3 group > 4-6 group (P<0.05). According to Pearson correlation analysis, liver fibrosis degree grade was positively correlated with miR-25-3p, spleen hardness and liver hardness (P<0.05), while liver fibrosis degree grade was negatively correlated with 25(OH)D3. The comparison of miR-25-3p, CHI3L1, liver fibrosis degree grade, spleen hardness value and liver hardness value among different liver function groups showed that group A <group B<group C (P<0.05), and group A>group B>group C (P<0.05) compared with 25(OH)D3. Logistic regression analysis was performed, and the analysis results were as follows: miR-25-3p level, liver fibrosis grade, spleen hardness value and liver hardness value were independent risk factors for poor liver function in patients with chronic hepatitis B (P<0.05), and 25(OH)D3 level was protective factor for poor liver function in patients with chronic hepatitis B (P<0.05).Conclusion With the increase of hepatitis B fibrosis grade and the deterioration of liver function, serum 25(OH)D3 decreased, miR-25-3p and CHI3L1 increase. 25(OH)D3, miR-25-3p, liver fibrosis degree grade, spleen hardness value, liver hardness value are associated with hepatitis B fibrosis and liver function in patients with chronic hepatitis B