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Sex clinical trials

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NCT ID: NCT05279053 Completed - Cigarette Smoking Clinical Trials

Mapping Brain Glutamate in Humans: Sex Differences in Cigarette Smokers

Start date: April 1, 2021
Phase:
Study type: Observational

The proposed study will evaluate sex differences in whole-brain glutamate (Glu), with a focus on the dorsal anterior cingulate cortex (dACC), anterior insula, and thalamus, as well as how it is influenced by sex (males vs. females), smoking state (overnight abstinent vs. sated), and circulating ovarian hormones (estrogen and progesterone) in women. Glu will be measured in almost the entire brain, with special focus on the dorsal anterior cingulate cortex (dACC), anterior insula, and thalamus, all of which have been implicated in behavioral states linked to tobacco withdrawal, using an echo-planar spectroscopic imaging (EPSI) variant of magnetic resonance spectroscopy (MRS). Serum ovarian hormones (estrogen and progesterone) will be measured for female participants to determine relationships between brain Glu and this hormone. Whole-brain Glu will be measured in 60 smokers (30 men, 30 women) twice, after overnight (~12 h) abstinence and after participants smoke the first cigarette of the day.

NCT ID: NCT04973631 Completed - Gastric Cancer Clinical Trials

The Effects of Sex and Age Differences on Gastric Cancer : a Retrospective Study

Start date: May 2003
Phase:
Study type: Observational

Gastric cancer (GC) is more prevalent in males than in females. One of these differences could be the effect of sex hormones such as estrogens. However, few reports have been reported regarding sex and age differences of incidence and survival of GC. The aim of this study was to evaluate the effect of sex and age on the incidence and survival of GC. And we would like to further analyze single GC and synchronous multiple GC, EBV, etc.

NCT ID: NCT04887883 Completed - Resistance Exercise Clinical Trials

Influence of Sex and Training on de Novo Muscle Protein Synthesis

TUT
Start date: January 1, 2019
Phase:
Study type: Observational

Acute exercise increases the incorporation of dietary amino acids into de novo myofibrillar proteins after a single meal in controlled laboratory studies in males. It is unclear if this extends to free-living settings or is influenced by training or sex. Over 24 h in a free-living setting, the investigators determined the effect of training status and sex on dietary phenylalanine incorporation into contractile myofibrillar and noncontractile sarcoplasmic proteins after exercise.

NCT ID: NCT03900312 Completed - Pregnancy Clinical Trials

Intergenerational Strengths-Based Program for American Indian Girls as They Transition to Adulthood

Start date: November 19, 2018
Phase: N/A
Study type: Interventional

The investigators will conduct a pilot study to assess the acceptability, feasibility, satisfaction, and participant-level outcomes among girls and their mother/female caregiver participating in a preconception health program. The program was developed through an extensive formative phase and is delivered weekly over ~3 months. The investigators will enroll a total of 60 female caregivers and their 8-11 year old daughters/female children to participate in the program and evaluation. Implementation data including acceptability, feasibility and satisfaction will be collected through REDCap and paper assessments completed after each program session and at the completion of the program. Preliminary impact data will be collected through REDCap up to 3 months post-intervention completion. The aims are as follows: 1. To understand if the preconception health program is feasible and acceptable among young girls and their mothers or female caregivers 2. To explore optimal implementation of the program to inform future research and scale up. 3. To assess preliminary impact of the preconception health program on girls' and caregiver's knowledge, cultural connectedness, caregiver-child relationship, community and school connectedness, coping skills, parenting self-efficacy, depression, quality of life as well as substance use behaviors and intentions and intention about sexual activity.

NCT ID: NCT02904629 Completed - Pregnancy Clinical Trials

Evaluation of Respecting the Circle of Life on Pregnancy Prevention Outcomes Among American Indian Adolescents

TPP
Start date: May 2016
Phase: N/A
Study type: Interventional

The objective of this research study is to evaluate a culturally tailored sexual and reproductive health intervention among American Indian (AI) youth. Specifically, the investigators aim to evaluate the impact of "Respecting the Circle of Life: Mind, Body and Spirit" on knowledge, attitude and behavioral outcomes associated with risk for unprotected sex, sexually transmitted infection (STI) and unintended pregnancy through a randomized controlled trial on the White Mountain Apache (WMA) reservation. The investigators will examine whether the RCL intervention effectively reduces risky sexual behavior among AI adolescents (11-19 years old), with long term goals of reducing teen pregnancy and incidence/prevalence of STIs. The evaluation will focus on well-established intermediate outcomes/risky sexual behaviors that predict long-term impact on teen pregnancy and STI incidence.

NCT ID: NCT02364934 Not yet recruiting - Sex Clinical Trials

Pharmacokinetics and Pharmacodynamics of Rocuronium in Closed-Loop Infusion System

Start date: March 2015
Phase: N/A
Study type: Observational

To explore and compare the effects of propoful, sevoflurane, and a combination of both on the pharmacokinetics and pharmacodynamics of rocuronium. To discover and confirm sex differences on the pharmacokinetics and pharmacodynamics of rocuronium. To evaluate and examine aged people on the pharmacokinetics and pharmacodynamics of rocuronium.

NCT ID: NCT02055001 Recruiting - Gender Clinical Trials

Sexual Hormones and Haemostasis: Observations for Women Health

SHOW
Start date: January 2014
Phase: N/A
Study type: Observational

Atherothrombotic disorders account for 25% of all deaths among women and for substantial morbidity and resource use in health care. Nonetheless, gender-related differences in the epidemiology of cardiovascular disease (CVD) remain largely unexplained. Among mechanisms that could account for such differences, the biology of platelets, which exert a pivotal pathogenetic role in atherothrombosis, and of coagulation system are on investigation. Thus, differences in platelet reactivity between women and men have been described using several methods and in response to varying stimuli. Indeed, sex steroid hormones could be involved in a different response of platelet to physiological response to agonists. The finding that estrogen receptors are expressed in platelets makes these cells an excellent model for studying the non-genomic effects of steroid hormones. Also coagulation cascade has been reported to be influenced by sexual endogenous as well as exogeneous hormones (i.e contraceptives) In particular, the impact of endogenous estrogens (menstrual cycle) on platelet activity and on response to antiplatelets drugs in fertile women has never been evaluated. Accordingly, the goal of this proposal is to investigate relationship between platelet function (assessed by aggregometry tests and markers of platelet activation in vivo such as thromboxane production, CD40L and P- selectin levels) and sex hormones during physiological regular menstrual cycles (28-30 days) in healthy pre-menopausal women aged from 18 to 40 years. Moreover, in a subgroup of healthy women free from antiplatelet drugs, will be planned a proof of concept study to investigate if there will be variations, during a short term (1 month) low dose aspirin, in platelet reactivity according to the different phases of menstrual cycle in 10 healthy premenopausal women aged from 18 to 40 years. Moreover, it will be investigate effect of steroid hormonal pattern on residual platelet activity response on treatment

NCT ID: NCT01926418 Not yet recruiting - HIV Clinical Trials

Using Implementation Intentions to Increase Safe Sex Practices in MSM

Start date: November 2013
Phase: N/A
Study type: Interventional

The purpose of this study is to assess the utility of the Theory of Planned Behavior in predicting condom use among men who have sex with men. It also aims to assess the utility of two interventions, one known as "implementation intentions", the other involves the practice of a planning task known as "the tower of Hanoi", in increasing condom use in this population.

NCT ID: NCT01906528 Completed - Muscle Relaxation Clinical Trials

Sex-related Differences in the Response to the Muscle Relaxant Drug Mivacurium

Start date: March 2013
Phase: Phase 1
Study type: Interventional

Muscle relaxants are drugs providing muscle relaxation during surgical treatment. Previous studies have shown that males and females respond differently to this kind of drug. Our hypothesis is that males are more sensitive to the effect of Mivacurium (a muscle relaxant) than females, meaning that males need a lower blood concentration of the drug than females in order to obtain a given effect.

NCT ID: NCT01454882 Completed - Adiposity Clinical Trials

Measuring Free-living Energy Expenditure Using Direct Calorimetry

Start date: January 2012
Phase: N/A
Study type: Observational

Although instruments such as pedometers and heart rate monitors are helpful for those who use exercise to maintain their weight, they do not actually measure calories expended, which is a critical piece of information necessary for sustained weight management. The purpose of this study is to determine the accuracy of a new device that measures calories burned based upon heat produced by the body. Since heat production is directly proportional to calories burned, this device has the potential to accurately measure energy expended in many different settings.