PHILADELPHIA – , according to a small, retrospective study presented at the annual meeting of the Menopause Society (formerly the North American Menopause Society).
More than 40% of women over age 40 in the United States have obesity, presenter Anita Pershad, MD, an ob.gyn. medical resident at Eastern Virginia Medical School, Norfolk, told attendees. Yet most of the large-scale studies investigating perimenopausal and postmenopausal hormone therapy included participants without major medical comorbidities, so little data exist on how effectively HT works in women with these comorbidities, she said
“The main takeaway of our study is that obesity may worsen a woman’s menopausal symptoms and limit the amount of relief she gets from hormone therapy,” Dr. Pershad said in an interview. “It remains unclear if hormone therapy is less effective in women with obesity overall, or if the expected efficacy can be achieved with alternative design and administration routes. A potential mechanism of action for the observed decreased effect could be due to adipose tissue acting as a heat insulator, promoting the effects of vasomotor symptoms.”
Dr. Pershad and her colleagues conducted a retrospective review of the medical records of 119 patients who presented to a menopause clinic at a Midsouth urban academic medical center between July 2018 and December 2022. Obesity was defined as having a body mass index (BMI) of 30 kg/m2 or greater.
The patients with and without obesity were similar in terms of age, duration of menopause, use of hormone therapy, and therapy acceptance, but patients with obesity were more likely to identify themselves as Black (71% vs. 40%). Women with obesity were also significantly more likely than women without obesity to report vasomotor symptoms (74% vs. 45%, P = .002), genitourinary/vulvovaginal symptoms (60% vs. 21%, P < .001), mood disturbances (11% vs. 0%, P = .18), and decreased libido (29% vs. 11%, P = .017).
There were no significant differences in comorbidities between women with and without obesity, and among women who received systemic or localized HT, the same standard dosing was used for both groups.
Women with obesity were much less likely to see a satisfying reduction in their menopausal symptoms than women without obesity (odds ratio 0.07, 95% confidence interval, 0.01-0.64; P = .006), though the subgroups for each category of HT were small. Among the 20 women receiving systemic hormone therapy, only 1 of the 12 with obesity (8.3%) reported improvement in symptoms, compared with 7 of the 8 women without obesity (88%; P = .0004). Among 33 women using localized hormone therapy, 46% of the 24 women with obesity vs. 89% of the 9 women without obesity experienced symptom improvement (P = .026).
The proportions of women reporting relief from only lifestyle modifications or from nonhormonal medications, such as SSRIs/SNRIs, trazodone, and clonidine, were not statistically different. There were 33 women who relied only on lifestyle modifications, with 31% of the 16 women with obesity and 59% of the 17 women without obesity reporting improvement in their symptoms (P = .112). Similarly, among the 33 women using nonhormonal medications, 75% of the 20 women with obesity and 77% of the 13 women without obesity experienced relief (P = .9).