Matar HE, Pincus D, Paterson M, et al. - This study was attempted to ascertain whether the high risk of surgical complications within one year of total hip arthroplasty (THA) is due to correlated comorbidities or morbid obesity alone as measured by body mass index (BMI ≥ 40 kg/m ²). Between 2012 and 2018, researchers performed a population-based retrospective cohort study including all adults in Ontario undergoing primary THA for osteoarthritis (all patients were followed for one year). They compared outcomes amongst matched groups (hypertension, diabetes, chronic obstructive pulmonary disease, frailty, congestive heart failure, coronary artery disease, asthma and Charlson score). The study population consisted a total of 3,635 patients with morbid obesity. The study showed that patients’ large body habitus appear to contribute to the elevated risk of surgical complications within 1 year of THA. Further study is required to distinguish ways of mitigating surgical complications such as centralizing care for this complex group of patients in specialist centres.