A number of systematic reviews and meta-analyses provide further consolidation in the evidence for an association between hearing loss and an increased risk of cognitive decline and / or dementia in older adults.
Thomson, RS. Auduong, P. [and] Miller, AT. [et al] (2017). Hearing loss as a risk factor for dementia: a systematic review. Laryngoscope Investigative Otolaryngology. March 16th 2017; 2(2): 69-79.
Possibly also of interest:
Hardy, CJ. Marshall, CR. [and] Golden, HL. [et al] (2016). Hearing and dementia. Journal of Neurology. November 2016; 263(11): 2339-2354. Review.
Exploring intervention mapping for reducing the impact of different sensory impairments:
Leroi, I. Pye, A. [and] Armitage, CJ. [et al] (2017). Research protocol for a complex intervention to support hearing and vision function to improve the lives of people with dementia. Pilot and Feasibility Studies. September 11th 2017; 3: 38.