In this paper, we describe a new application for multimedia indexing, using a system that monitors the instrumental activities of daily living to assess the cognitive decline caused by dementia. The system is composed of a wearable camera device designed to capture audio and video data of the instrumental activities of a patient, which is leveraged with multimedia indexing techniques in order to allow medical specialists to analyze several hour long observation shots efficiently. Categories and Subject Descriptors H.3.1 [Content Analysis and Indexing]: Indexing methods. J.3 [Life and Medical Sciences]: Health. General Terms Algorithms, Measurement, Experimentation. Keywords Wearable camera, patient monitoring, audio and video indexing.