Using the prevalence for Dementia based on age and gender and the positive and negative Likelihood Ratios for the MMSE test (Mini Mental State Exam), this app uses the Bayes' theorem to calculate the post-test probability for Dementia.
The prevalence numbers are official data from Norway.
The Likelihood Ratios for the MMSE test are based on:
https://pubmed.ncbi.nlm.nih.gov/12779304/
https://pubmed.ncbi.nlm.nih.gov/12110070/
American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 4th ed. Text revision ed. Washington, DC: American Psychiatric Association; 2000