Participate in a Study

Participate in a study

Current studies

Vitamin C and cardiovascular risk

We are looking for healthy people aged 40-60 for a study focused on Vitamin C and sleep. We are investigating how a single dose of Vitamin C affects blood vessels during daily morning activities (such as exercise and changes in posture).

Eligible participants may be lean or overweight (BMI<30) with no current medication use and no history of cancer, heart disease, or other chronic illness. Participants currently taking Vitamin C supplements or eating more than 14 servings of fruit/vegetables weekly will be excluded. Initial screening involves 2-4 hospital visits followed by establishing a 1-2 week home sleep and activity routine. If successfully completed, this will be followed by two separate overnight in-lab stays. Compensation up to $445 will be provided.

If you are interested in participating, please access our pre-screening survey.

Circadian mechanisms of cardiovascular risk in obesity

We are looking for healthy people aged 35-65 for a study focused on body weight and sleep. We are investigation how behaviors (such as exercise and changes in posture) and the body's internal clock (called the circadian rhythm) affect the control of the heart and blood pressure. Eligible participants may be lean or overweight with no current medication use and no history of cancer, heart disease, or other chronic illness.Initial screening involves 2-4 hospital visits followed by establishing a 1-3 week home sleep and activity routine. If successfully completed, this will be followed by a 5 day in-lab stay. Compensation up to $1,700 will be provided.

If you are interested in participating, please access our pre-screening survey.

Developing a Total Worker Health® Climate Survey

We are seeking organizations who are interested in participating in a research project developing a Total Worker Health climate survey to help organizations build strong cultures for safety, health and well-being. Participating organizations may benefit directly through (1) identifying disconnects between company policies and actual operational practices, (2) identifying program underperformance, (3) improving employee participation across safety, health and well-being, (4) improving ROI, (5) a safer and healthier workplace, and (6) lower turnover rate, higher job satisfaction and increased employee engagement.

Qualifying organizations will have 500 or more employees and can be from any sector. We are also particularly interested in companies from the utility, manufacturing, and transportation sectors. Participating organizations are requested to (1) provide a letter of intent to participate to be included in the grant application (researchers will provide templates for the participant’s convenience), and (2) allow all employees to complete a one-time, online 15-20 minute survey during working hours. The survey can be completed on any computer or mobile device (i.e., PC, tablet device, smart phone). 

Interested companies should contact Dr. Emily Huang and the Safety Climate Lab at SafetyClimate@ohsu.edu. We would like to hear from you if you are interested in getting involved with safety culture and climate work!

THC and sleep

We are looking for volunteers for a study on the effect of tetrahydrocannabinol (THC) on sleep in humans. Eligible participants will be between the age of 21 and 34 years old with a BMI less than 30 and free of any acute, chronic or debilitating medical conditions. Participants may be regular cannabis users (smoked, or digested weekly for the past 3 months) or controls with no cannabis use.Initial screening involves 2-3 clinic visits (<8 hours total) followed by establishing a 1-3 week home sleep and activity routine. If successfully completed, this will be followed by a 3 night in-lab stay including administration of oral THC. Compensation up to $755 will be provided.

If you are interested in participating, please access our pre-screening survey.

Health disparities in hypertension

We are looking for healthy people aged 40-60 for a study focused on hypertension and sleep. We are investigation how behaviors (such as exercise and changes in posture) and the body's internal clock (called the circadian rhythm) affect the control of the heart and blood pressure. Eligible participants may have normal blood pressure or have mild hypertension with no current medication use and no history of cancer, heart disease, or other chronic illness. Initial screening involves 2-4 hospital visits followed by establishing a 1-3 week home sleep and activity routine. If successfully completed, this will be followed by a 6 night in-lab stay. Compensation up to $2,400 will be provided.

If you are interested in participating, please access our pre-screening survey here.

Sedentary behavior, cardiovascular health and sleep

We are looking for moderately active, healthy people aged 30-60 that get most of their exercise from walking. We are investigating how sedentary behavior (reduced activity) affects cardiovascular health and sleep. Eligible participants may be lean or overweight (BMI <30) with no current medication use and no history of cancer, heart disease, or other chronic illness. Initial screening involves 1 hospital visit followed by 1 week of at-home sleep and activity monitoring. If successfully completed, this will be followed by 5 weekly in-lab visits (4.5 hours each), with at-home sleep and activity monitoring for the duration of the study (4 weeks). Compensation up to $650 will be provided.

If you are interested in participating, please access our pre-screening survey here.