General self-efficacy differentially moderates depressive symptoms in adults with epilepsy depending on seizure severity

Abstract

Purpose: We evaluated whether the relationship between general self-efficacy and depressive symptoms in patients with epilepsy differed depending on age, sex, and seizure status.

Methods: This multicenter, cross-sectional study was conducted on 299 adults with epilepsy, using the Beck Depression Inventory (BDI) and the General Self-efficacy Scale (GSES). We performed stepwise linear regression analysis and analysis of covariance with interaction terms.

Results: The stepwise linear regression analysis showed that BDI scores were negatively correlated with GSES scores and positively correlated with age ≥ 40 years, unemployed status, recurrence of generalized or focal to bilateral tonic-clonic seizures (GTCS or FBTCS), and antiseizure medication polytherapy. The final model explained 38.9% of the variance in BDI scores. The analysis of covariance revealed that the moderating effect of GSES scores on BDI scores was less in subjects who had seizure freedom for at least 1 year than in those who did not. In contrast, the moderating effect of GSES scores on BDI scores was greater in subjects who had an age ≥ 40 years and those who experienced GTCS or FBTCS during the previous year than in those who did not. The negative relationship between GSES and BDI scores tended to be stronger in men than in women, but it did not reach statistical significance (p = 0.098). All models were adjusted by significant factors in the linear regression analysis of BDI scores.

Conclusions: The negative relationship between general self-efficacy and depressive symptoms may be stronger in older patients and patients with poorer seizure outcomes.