Patterns of psychiatric medication use among nationally representative long-term cancer survivors and controls

Investigations of long-term cancer survivors (LTCS) indicate that this population is not appreciably different from cancer-naive peers with respect to several neuropsychiatric domains. The current study sought to determine whether differences in psychiatric medication use might help to explain the negative findings.

In a nationally representative sample, 5692 subjects were queried for cancer history, psychiatric diagnoses, and psychotropic medication use. The LTCS were defined as those individuals who were ≥5 years from diagnosis and whose cancer was in remission or cured. Odds ratios and 95% confidence intervals were obtained from multivariable logistic regression models evaluating the relationship between cancer status and use of psychiatric medications. The interaction between case/control status and psychiatric diagnoses was also tested in a logistic regression model to predict psychotropic medication use.

A total of 225 participants met the criteria for LTCS and 3953 met the criteria for cancer-naive controls (CNC). The LTCS were no more likely than CNC to carry a psychiatric diagnosis. Despite the LTCS reporting somewhat greater psychotropic medication use compared with the CNC (28.8% vs 22.3%), unadjusted and adjusted differences did not reach statistical significance, possibly due to sample size. The interaction between case/control status and carrying a psychiatric diagnosis was not found to be significantly associated with receiving a psychiatric medication.

LTCS and CNC demonstrated comparable rates of psychiatric prescription medication use. The relationship between taking a psychiatric medication and carrying a psychiatric diagnosis was not found to be significantly different between the case and control groups. These findings contribute to an emerging hypothesis that in general LTCS are not a particularly psychiatrically vulnerable group.