Objective:

To examine the bidirectional associations between clinically diagnosed premenstrual disorders and various psychiatric disorders in a large Swedish cohort, emphasizing the reciprocal nature of these relationships.

Key Findings:

• Women with premenstrual disorders had about twice the risk of developing psychiatric disorders, highlighting the importance of monitoring these patients.
• 48% of women with premenstrual disorders had a prior psychiatric diagnosis compared to 30% of controls, indicating a significant overlap.
• 37% of women with premenstrual disorders developed a subsequent psychiatric disorder during follow-up, underscoring the need for integrated care.
• Bidirectional associations were observed for 13 of 14 psychiatric categories, particularly strong links to depression and anxiety disorders, suggesting shared underlying mechanisms.

Interpretation:

The findings suggest shared biological pathways, such as hormonal influences and neurotransmitter dysregulation, between premenstrual disorders and psychiatric conditions, indicating the need for sex-specific and menstrual cycle-informed psychiatric care.

Limitations:

• Registry-based diagnoses may not confirm the criterion-standard diagnostic approach for premenstrual disorders, which could lead to underdiagnosis.
• Timing of clinical diagnoses may not accurately reflect symptom onset, potentially skewing the association.
• Potential surveillance bias and diagnostic misclassification due to symptom overlap may affect the reliability of the findings.

Conclusion:

The study underscores the importance of awareness among healthcare providers regarding the co-occurrence of premenstrual and psychiatric disorders, advocating for integrated and informed care strategies.