Statistical analysis
blood loss
BLOOD LOSS, COMPLICATIONS
Data analysis mainly includes measurement data and enumeration data. The measurement data included age, height, weight, BMI, preoperative hematology-related values, reduction of Hemoglobin, total blood loss and postoperative inflammatory indicators level. The enumeration data included the sex, ASA classification, the opioid consumption transfusion and complications. Shapiro–wilk test was used to test the normality of measurement data, and x ± s was used to show the normal distribution, and independent sample t-test was used for comparison between two groups. Chi‑square test or Fisher exact test were used for enumeration data. Pearson correlation analysis was used to analyze the correlation. All statistical analyses were performed using SPSS 24.0 (SPSS Inc., Chicago, IL, USA), and a value of 