Figure 1. Trends in initial presentation with regards to unilateral hearing loss (A) and primary presenting symptom (B).

(A) The proportion of patients presenting with hearing loss as the main presenting symptom is shown on the x-axis (e.g., 0.75 corresponding to 75% of patients). The blue dashed line shows the smoothed pattern over time following a time series analysis.

(B) The trend in presenting symptoms other than hearing loss. This demonstrates that in the later years of the study (right side of the graph), there has been an increase in patients presenting with ataxia, vertigo and incidental tumours.