Relationship Satisfaction and Depression After Traumatic Brain Injury: An Actor-Partner Interdependence Model of Patients and Caregivers in Mexico and Colombia.

The study did not track how many dyads refused participation, so selection bias is possible; those with happier relationships may have been more likely to enroll. Patients self-consented, meaning those with more severe cognitive impairments were likely excluded, limiting generalizability to severe TBI cases. The sample was relatively small (109 dyads), preventing analysis of how relationship type (e.g., spouse vs. parent) might moderate effects. Findings are from Mexico and Colombia and may not generalize to other cultures or countries due to specific cultural values like familismo. The majority of patients were male and caregivers female, so results may not apply to other gender combinations.

The authors reported no conflicts of interest. The study was supported by the National Institute on Disability, Independent Living, and Rehabilitation Research (NIDILRR) and the National Institute of Child Health and Human Development (NICHD).

Do not interpret these associations as proof that improving relationship satisfaction will directly cure depression. The study shows correlations over time in a specific cultural context, not a tested intervention effect. Also, the sample excluded patients with severe cognitive impairments who could not consent, so these findings may not apply to your most severely impaired patients.