Self‐reported dry mouth among ageing people: a longitudinal, cross‐national study

Focusing on Swedish and Norwegian cohorts of community‐dwelling older adults between age 65 and 70, this study aimed to identify predictors of the prevalence and incident cases of daytime and night‐time xerostomia. It was hypothesized that the prevalence increases with increasing age and is higher in women than in men and that the prevalence of persistent xerostomia and the 5‐yr‐incident cases are higher in people with consistent use of medication and need for health care. Of the Norwegian participants who completed the 2007 survey (age 65 yr), 70% (n = 2,947) participated in 2012. Individuals participating in both 2007 and 2012 constituted the Swedish panel (80%, n = 4,862). The prevalence of xerostomia was higher in women than in men and increased from age 65 to age 70, most markedly in the Swedish cohort. The risk of persistent xerostomia was greatest for participants with consistent use of medication (OR = 1.3) and contact with a physician (OR = 2.3). The risk of incident cases of xerostomia during daytime was greatest for participants with recent and consistent use of medication and recent contact with a physician. Dental professionals should identify patients with xerostomia, emphasize early prevention, and alleviate oral symptoms in collaboration with physicians.

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