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Working memory deficit in premenstrual dysphoric disorder and its associations with difficulty in concentrating and
Ju-Yu Yen1, Shun-Jen Chang, Cheng-Yu Long
1Department of Psychiatry, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan.
Objective:
This study evaluates working memory deficit among women with premenstrual dysphoric disorder (PMDD) and whether such a deficit and its premenstrual aggravation is associated with difficulty in concentrating, irritability, and impaired daily function or not.
Method:
Sixty women with PMDD (PMDD group) and 60 women without PMDD (control group) completed the assessment. Severity of irritability, difficulty concentrating, total symptoms, and functional impairment of PMDD were evaluated by the Premenstrual Symptoms Screening Tool. All participants performed N2 and N3 back tasks to assess working memory in both luteal and follicular phases.
Results:
The PMDD group had significantly poorer performance on N2 and N3 back tasks than the control group did in the luteal phase but not in the follicular phase. Compared to the control group, the PMDD group also exhibited more deterioration in performance of N3 back task in the luteal phase. Performance of N2 and N3 back tasks in luteal phase was significantly associated with irritability, symptom severity, and functional impairment by PMDD.
Conclusions:
Working memory deficit is aggravated in the luteal phase among women with PMDD. Appropriate interventions are needed to prevent negative consequences of working memory deficit.
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