Objective: To determine the association between family functionality and adherence to treatment in geriatric patients with arterial hypertension in a primary care unit.

Methods: A cross-sectional, analytical, and observational study was conducted in 300 patients over 60 years of age at the Family Medicine Unit No. 1 in Orizaba, Veracruz, Mexico. The family APGAR was applied to assess functionality, the Morisky-Green test to measure therapeutic adherence and the MOS questionnaire to assess perceived social support. Sociodemographic variables and family typology were included. The statistical analysis was performed using the GraphPad Prism v.8 program, using descriptive and inferential statistics using X² test (p < 0.05).

Results: 65% (195) of the participants were women, with a mean age of 68 years. 82.67% (248) had functional families and 77% (231) showed adherence to treatment. A significant association was found between family adherence and functionality (p = 0.0298), social support (p = 0.0224) and employment status (p = 0.0326). No associations were found with sex, education, marital status, or family typology.