Bio

Academic Appointments


Publications

All Publications


  • Association of daily step count and serum testosterone among men in the United States. Endocrine Del Giudice, F., Glover, F., Belladelli, F., De Berardinis, E., Sciarra, A., Salciccia, S., Kasman, A. M., Chen, T., Eisenberg, M. L. 2021

    Abstract

    PURPOSE: To describe the association between daily activity (i.e., daily step counts and accelerometer intensity measures) and serum TT levels in a representative sample of US adults aged 18 years or older.METHODS: A retrospective cohort study was carried out utilizing the NHANES (National Health and Nutrition Examination Survey) 2003-2004 cycle. Physical activity was measured with a waist-worn uniaxial accelerometer (AM-7164; ActiGraph) for up to 7 days using a standardized protocol. Using linear and multivariable logistic regression controlling for relevant social, demographic, lifestyle, and comorbidity characteristics, we assessed the association between daily step counts and TT.RESULTS: A total of 279 subjects with a median age 46 (IQR: 33-56) were included in the analysis. 23.3% of the cohort had a low serum TT level (TT<350ng/dl). Compared to men who took <4000 steps per day, men who took >4000 or >8000 steps/day had a lower odd of being hypogonadal (OR 0.14, 95% CI: 0.07-0.49 and 0.08, 95%CI: 0.02-0.44, respectively). While a threshold effect was noted on average, TT increased 7ng/dL for each additional 1000 steps taken daily (beta-estimate: 0.007, 95% CI: 0.002-0.013).CONCLUSIONS: Patients with the lowest daily step counts had higher odds of being hypogonadal. The current work supports a possible association between daily steps, total testosterone, and hypogonadism for men in the US.

    View details for DOI 10.1007/s12020-021-02631-2

    View details for PubMedID 33580402

  • The Association of the COVID-19 Pandemic on Male Sexual Function in the United States: A Survey Study of Male Cannabis Users. Sexual medicine Chen, T. n., Bhambhvani, H. P., Kasman, A. M., Eisenberg, M. L. 2021; 9 (3): 100340

    Abstract

    International studies have suggested that social disruptions caused by the COVID-19 pandemic have led to sexual dysfunction, but the impact on males in the United States is less defined.To examine changes in male sexual function during the COVID-19 pandemic and to evaluate associated demographic variables.Prepandemic survey data was collected between October 20, 2019 and March 1, 2020 on adult males in the United States. Follow-up survey data collected for comparison during the COVID-19 pandemic between August 1, 2020 and October 10, 2020 included International Index of Erectile Function (IIEF) scores, Patient Health Questionnaire for Depression and Anxiety with 4 items (PHQ-4) scores, and questions regarding sexual frequency. Questions were also asked about mask-wearing habits, job loss, relationship changes, and proximity to individuals who tested positive for COVID-19.Differences in prepandemic and pandemic male sexual function assessed by self-reported IIEF domain scores and sexual frequency RESULTS: Seventy six men completed both prepandemic and pandemic surveys with a mean age of 48.3 years. Overall, there were no differences in either overall IIEF score or any subdomain score when comparing men's pre-pandemic and pandemic survey data. There was an increase in sexual frequency during the pandemic with 45% of men reporting sex ten or more times per month during the pandemic compared to only 25% of men prior to the pandemic (P = .03). Among the subgroup of 36 men who reported a decrease in IIEF, the decrease was an average of 3.97, and significantly associated with higher PHQ-4 depression subscale scores (1.78 vs 1.03, P = .02).The COVID-19 pandemic is associated with increased sexual frequency and no change in overall sexual function in males in the United States. Interventions intended to promote male sexual health during the COVID-19 pandemic should include a focus on mental health. T Chen, HP Bhambhvani, AM Kasman, et al. The Association of the COVID-19 Pandemic on Male Sexual Function in the United States: A Survey Study of Male Cannabis Users. J Sex Med 2021;XX:XXX-XXX.

    View details for DOI 10.1016/j.esxm.2021.100340

    View details for PubMedID 33789175

  • Challenges in Survey-Based Research. The journal of sexual medicine Chen, T. n., Eisenberg, M. L. 2020

    View details for DOI 10.1016/j.jsxm.2020.08.013

    View details for PubMedID 32943376

Footer Links:

Stanford Medicine Resources: