To investigate the relationship between body mass index (BMI) and clinical characteristics and long-term prognosis in patients undergoing percutaneous coronary intervention.

A retrospective analysis of 385 patients treated with PCI from January 2010 to December 2013 was performed in three groups according to BMI: 132 patients in the normal group (18.5 kg/m²≤BMI<25 kg/m²), 184 patients in the hyperrecombination group (25 kg/m²≤BMI<30 kg/m²), and 69 patients in the obese group (BMI≥30 kg/m²). The basic information of all patients, lesion characteristics during PCI, postoperative left heart ejection fraction (LVEF), glomerular filtration rate (eGFR), long-term mortality, prognosis and complications during hospitalization and 30 days after surgery were compared with the three groups.

The proportion of hypertension and diabetes mellitus was significantly higher in the obese group than in the normal group (P<0.05), and the proportion of obstructive sleep apnea (OSA) was significantly higher in the obese group than in the normal group (P=0.029); the proportion of eGFR≥60 ml/min/1.73m² was significantly lower in the obese group than in the normal group(P<0.05); The overall survival rate was significantly lower in the obese group than in the normal group (HR=2.281, 95 CI%: 1.120-4.645, P=0.023); BMI (≥30 kg/m²), combined hypertension, diabetes, OSA and eGFR<60 ml/min/1.73m² were the risk factors that affected the long-term prognosis after PCI (P<0.05).

BMI≥30 kg/m² is an independent risk factor for poor long-term postoperative prognosis in patients with PCI.