Urine Albumin-Creatinine ratio is associated with prognosis in patients with diabetic foot osteomyelitis

We aimed to explore the association between albuminuria and clinical outcomes in patients with diabetic foot osteomyelitis (DFO).This is an observational retrospective study and a total of 202 inpatients with DFO were eligible for inclusion in our study. Based on urine albumin-creatinine ratio (UACR), the patients were divided into three groups: normoalbuminuria group, microalbuminuria group and macroalbuminuria group. The data collected include demographics data, laboratory data, clinical diagnostic data, diabetic foot examination and clinical visit data. The association was then evaluated between albuminuria and all-cause mortality, major cardiovascular adverse events (MACE) and mixed endpoint events.The mean age was 60.3 years, 62.9% were male and 45.05% were urinary protein-positive. The incidence rates of all-cause mortality, MACE and mixed endpoint events related to elevated UACR were significantly increased in patients with DFO (all P for trend < 0.01). After adjusting for confounders, compared with normoalbuminuria group, the risk of all-cause mortality, MACE and mixed endpoint events in the microalbuminuria group increased by 81.8%, 135.4% and 136.4%, respectively. The risk of all-cause mortality, MACE and mixed endpoint events in the macroalbuminuria group increased by 246.2%, 145.1% and 252.3%, respectively. The population attributable risk percentage (PAR%) suggested that 50.16% of all-cause mortality, 47.85% of MACE and 59.11% of mixed endpoint events could be attributed to the elevated UACR. Meanwhile, compared with normoalbuminuria, those with microalbuminuria or macroalbuminuria have lower apoA1 and ABI, higher SCr and higher incidence rate of CHD, hindfoot infection and severe infection (all P < 0.05).In patients with DFO, the UACR level is associated with all-cause mortality, MACE and mixed endpoint events and elevated UACR levels increase the risk of all-cause mortality, MACE and mixed endpoint events.