INS and diabetes mellitus: In the cohort of men older than 74 years, the following factors were associated with PSA testing: (1) age (odds ratio [OR] 0.89, 95% CI 0.88-0.89; (2) low income (OR 0.18, 95% CI 0.05-0.60); (3) nonspecific conditions related to frailty: chronic disease (OR 0.82, 95% CI 0.76-0.88) and repeated ambulance transportation (OR 0.37, 95% CI 0.31-0.44); and (4) various specific comorbidities: diabetes requiring insulin (OR 0.51, 95% CI 0.43-0.60), dementia (OR 0.68, 95% CI 0.55-0.84), and antipsychotic treatment (OR 0.62, 95% CI 0.51-0.75; Table 2).