[Predictive value of neutrophil/lymphocyte ratio in the prognosis of primary biliary cholangitis].

<b>Objective:</b> To predict pre-treatment clinical parameters that are associated with poor response and prognosis to ursodeoxycholic acid (UDCA) in patients with primary biliary cholangitis (PBC) and to use second-line treatment drugs in the early stages to delay the progression of the disease so that patients can benefit from early-stage treatment. <b>Methods:</b> Patients diagnosed with PBC at the Second Affiliated Hospital of Kunming Medical University from 2013 to 2022 were collected. Two hundred fifty-seven cases were screened in accordance with the inclusion and exclusion criteria. The response and prognosis conditions one year after treatment were followed up in outpatient and inpatient departments, as well as through telephone calls. Statistical analyses were performed using <i>t</i>-tests, Mann-Whitney <i>U</i> test, <i>􀱽</i>² test, Fisher's exact test, and logistic regression analysis according to different data. <b>Results:</b> A total of 257 PBC cases were included, with 223 females (86.80%) and 34 males (13.20%). Univariate and multivariate binary logistic regression analyses showed that baseline high albumin levels [odds ratio (<i>OR</i>): 0.882, 95% confidence interval (<i>CI</i>): 0.805～0.967, <i>P</i>=0.008] were a protective factor for PBC patients' response to UDCA treatment after adjusting for different confounding factors, while baseline high alkaline phosphatase (<i>OR</i>: 1.012, 95%<i>CI</i>: 1.008～1.016, <i>P</i><0.001) and baseline high neutrophil/lymphocyte ratio (NLR) level (<i>OR</i>: 1.462, 95%<i>CI</i>:1.079～1.981, <i>P</i>=0.014) were risk factors for a poor response to UDCA. Trend analysis showed that the baseline NLR quantile was positively correlated with the risk of poor response to UDCA (<i>OR</i>: 5.512, 95%<i>CI</i>: 1.040～29.216, <i>P</i>=0.045) in patients with PBC. Cox proportional hazards regression analysis identified that age [hazard ratio (<i>HR</i>): 1.050, 95%<i>CI</i>: 1.019～1.082] and NLR value (<i>HR</i>:1.089, 95%<i>CI</i>:1.021～1.161) were independent influencing risk factors for all-cause mortality in PBC patients (<i>P</i><0.05). <b>Conclusion:</b> Baseline high albumin levels are protective factors against a poor biochemical response to UDCA, while baseline high alkaline phosphatase levels and high NLR are risk factors for a poor biochemical response to UDCA in patients with PBC. Additionally, baseline high NLR values are positively correlated with poor biochemical response to UDCA treatment.