Female Patients Show a Larger Reduction in Suicidal Ideation in Inpatient Addiction Treatment Than Male Patients: Results of a Single-Center Observational Study.

Background: Substance use disorders (SUD) are prevalent disorders worldwide. Among other associated health problems, patients with SUD are at an increased risk of dying of suicide, with females displaying an even higher risk than males. Therefore, the aim of this study was to conduct a gender-sensitive evaluation of changes in suicidal ideation during multimodal inpatient treatment at a hospital facility specialized in treating addiction. Methods: A total of 694 patients (68.2% male) completed routine assessment including suicidal ideation, abstinence confidence, impulsivity, emotion regulation, self-efficacy and autonomy and joy both before (T1) and at the end (T2) of treatment. Mean changes were evaluated with repeated measures MANOVAs. Results: Before treatment, a total of n=127 (18.3%) of the respondents reported suicidal ideation, which was reduced to n=72 (10.4%) by the end of treatment. Among female patients, the change in reported suicidal ideation compared from T1 to T2 (21.7% vs 7.7%) was significantly higher than among male patients (T1: 16.7%%, T2: 11.6%; p=0.040). Generally, females reported worse symptoms scores and slightly higher numbers of suicidal thoughts at baseline (effect sizes ranging from η²=.008 - 0.044). While both genders significantly profited from the treatment, female patients generally showed larger improvements than male. Discussion: Our study underscores the beneficial effect of addiction-specialized inpatient treatment on suicidal ideation. Additionally, we found a substantial gender effect: while female patients generally were more distressed before treatment, they also reported higher symptom reduction during the treatment. This result highlights the need to perform more gender-sensitive research and develop more gender-sensitive treatment programs.