Fig. 2

Relationship between different albumin level groups and 30-day readmission rates in patients with hip fracture. a Mean and standard deviation of albumin levels between the 30-day readmission group and non-readmission group. b Comparison of 30-day readmission rates between normal albumin group and hypoalbuminemia group. c Patients were categorized into 4 groups using clinical thresholds, comparing 30-day readmission rates among the 4 groups. d Patients were divided into 4 quartiles, comparing 30-day readmission rates among the 4 quartiles