Otitis media, commonly known as middle ear inflammation, demonstrated a high prevalence rate in history. This trend also persists today. This condition is influenced by a combination of...Show moreOtitis media, commonly known as middle ear inflammation, demonstrated a high prevalence rate in history. This trend also persists today. This condition is influenced by a combination of environmental and genetic factors, of which the most important for the context of this thesis are urbanization and air pollution, joined by overcrowding. Mastoiditis is closely associated with otitis media, as it often arises as a consequence of untreated otitis media. In the field of osteology, various diagnostic methods are used to identify otitis media, leading to a problem in comparison and verification of results obtained through different methods. So, what is the interrelationship of these methods? Do they produce similar results? The main aim of this thesis was to answer this question. To investigate the interrelationship of these diagnostic methods, a sample of 97 individuals from post-medieval Arnhem, the Netherlands, was analyzed. The methods selected for the analysis were chosen from diverse case-studies, with each method focusing on the analysis of a specific skeletal element. These elements included auditory ossicles, the temporal bone around the external auditory meatus, and the mastoid process. The method focusing on the mastoid process is utilized for diagnosing mastoiditis, rather than otitis media. In addition to the three primary methods, two other diagnostic approaches were included in the analysis. These methods involved the utilization of computed tomography (CT) scans to assess mastoid air cells pneumatization and endoscopic examination of the cochlear promontory. Dataset collected by Casna et al. (2023a) was used, as they were the ones utilizing these two methods. The findings of this study revealed relatively low concurrence rates among the three primary diagnostic methods, and even lower rates when all five methods were compared. The presence of such results called for an exploration of explanatory models that would aim to explain such low concurrence rates. Additionally, factors possibly influencing the results were also considered. This research underscores the need for developing a universal and standardized method for diagnosing otitis media. The lack of agreement among the diagnostic methods suggests not all of them are linked to the same underlying cause, therefore signifying the need for a better approach. While this research provided valuable insight into the interrelationship of some of the diagnostic methods, further research that would compare other methods that have not been compared here is necessary for better understanding of the complexity of situation surrounding otitis media diagnosis in osteoarchaeology.Show less