Premenstrual disorders (PMDs), including premenstrual dysphoric disorder (PMDD), adversely affect the lives of millions of women worldwide. Most girls and women — as many as 80%-90%— will experience some premenstrual discomfort such as irritability, depressed mood, food or alcohol cravings, bloating, body aches, breast pain, constipation, or fatigue.
Diagnosable menstrual disorders include, collectively, premenstrual syndrome (PMS); PMDD, formerly called late luteal phase dysphoric disorder; and premenstrual worsening of another medical condition.
The most debilitating of these is PMDD, which has an estimated prevalence of about 4%-8% in women of reproductive age, according to obstetrician/gynecologist Hoosna Haque, MD, assistant professor of medicine at Columbia University Irving Medical Center in New York City.
“It’s difficult to be sure because this condition is underreported,” said Luu D. Ireland, MD, MPH, assistant professor of obstetrics and gynecology at UMass Memorial Medical Center in Worcester, Massachusetts. “But more women are coming forward, and there’s more discussion and media coverage of this condition.”
Occurring in the same post-follicular timeframe as PMS, PMDD takes cyclical discomfort to a more intense level, with a trifecta of affective comorbidities, somatic manifestations, and behavioral changes, all of which can seriously impair daily functioning, including work, physical activities, and personal relationships. Romantic and marital relationships can be particularly impaired.
Although recent cost figures are lacking, PMDs exact a considerable economic toll with increased direct healthcare costs from doctor visits and pharmaceuticals. A 2010 study found that US women with PMS were more likely to accrue in excess of $500 in healthcare visit costs over 2 years, and the figure would likely be higher today. PMDs also increase work/school absenteeism and reduce productivity.
Etiology
Brain areas that regulate emotion and behavior contain receptors for estrogen, progesterone, and other sex hormones, which affect the functioning of neurotransmitter systems influencing mood and thinking. Although the precise pathophysiology remains unclear, PMDD is likely multifactorial and results in a heightened sensitivity to normal fluctuations in estrogen and progesterone during the luteal phase of the menstrual cycle and dysfunction of the serotonin and gamma-aminobutyric acid neurotransmitter systems.
Patients with PMDD have lower levels of cortisol and beta-endorphins during both the follicular and luteal phases, suggesting abnormalities in the hypothalamic-pituitary-gonadal axis (HPGA), which is consistent with dysregulation in mood disorders.
Risk Factors
These include family history, past traumatic events, smoking, chronic pain syndrome, and obesity. There may be a genetic component as recent studies have suggested the involvement of the gene that codes for the serotonergic 5HT1A receptor and allelic variants of ESR1 in the development of PMS/PMDD.
A particularly concerning aspect of PMDs of any sort is their possible association with a higher risk for death from non-natural causes. In a recent Swedish study, which did not distinguish between PMDs in general and PMDD in particular, patients had an almost 60% greater risk for death from non-natural causes and nearly twice the risk for death by suicide compared with women without PMDs.
Those diagnosed with a PMD at an early age showed excess mortality, and the risk for suicide was elevated regardless of age. “These findings support the need for careful follow-up for young women with PMDs and the need for suicide prevention strategies,” wrote lead author Marion Opatowski, PhD, a medical epidemiologist at Karolinska Institutet in Stockholm, Sweden. “Women with severe PMDD should definitely be monitored for suicidal thoughts or behavior and they should have an emergency outreach plan in place,” Haque added.