Incidence and impact of hospital-acquired complications in an internal medicine unit of a reference hospital in Cameroon: a prospective cohort study

Background Hospital-acquired complications (HACs) contribute to increased morbidity, mortality and hospital costs. However, their burden is often overlooked in resource-limited settings. We sought to determine the incidence, risk factors and effects of HACs on direct medical costs. Methods This was a prospective cohort study conducted in the Internal Medicine inpatient ward of Douala General Hospital over 3 mo. Patients were examined daily from admission to discharge, transfer or death. Incidence of HACs was calculated and risk factors of HACs were determined using univariate and multivariate regression models. Results The cumulative incidence rate of HACs in 230 participants was 29.2/1000 patient-days. The incidence rate of infectious and non-infectious complications was 8.4/1000 and 20.9/1000 patient-days, respectively. The most common HAC was constipation (8.3/1000 patient-days). The most common infection was urinary tract infection (3.7/1000 patient-days). HIV infection and length of stay >8 d were significantly associated with the occurrence of HACs. Deep vein thrombosis was associated with the highest direct medical cost. Conclusion The incidence of HACs is high in our setting and leads to increased length of hospital stays as well as greater direct medical costs. Thus, there is a need for effective preventive strategies.