About NHS3

NHS3 Quick Facts

Year Started: 2010

Number of Participants: 40K+, Enrolling

Ages @ Baseline: 19+ years old

Key eligibility criteria: Nurses of any gender identity and nursing students

NHS3 Study Info

Main contact: Dr. Jorge Chavarro, Principal investigator

Founding PI: Dr. Jorge Chavarro

Purpose (NHS3)

• • To study the long-term health effects of nutrition, hormones, environment, and nurses’ occupational exposures among women and men

  • Particular areas of focus are fertility and pregnancy events as well as the association of adolescent diet with breast cancer risk

  • A key goal is enrollment of individuals from diverse ethnic backgrounds

NHS3 Study Function

Participants complete a module (questionnaire) every 6 months once joining the cohort. If a module is not completed they do not move on to the next one. The modules are completed sequentially. Sub-studies are usually open to participants who have completed at least MOD1 and MOD2, though there are some exceptions. 

There is a sub-study for individuals who indicate they are currently pregnant or trying to become pregnant and are willing to complete additional questionnaires. 

Eligibility

• A nurse of any gender (currently working, not working, or retired)

• A nursing student of any gender

• Age 18 and over, and born in 1965 or later

• Living in the United States or Canada

• Willing to complete online questionnaires on a periodic basis

Participants must have or be working toward one of the following certifications:

• Registered Nurse (RN)

• Licensed Practical Nurse (LPN)

• Licensed Vocational Nurse (LVN)

• Specialized RN, such as Nurse Practitioners (NP), Nurse Anesthetists (CRNA), or other RNs holding advanced practice certifications/licensures (e.g., Certified Nurse Midwife)

Inclusion Criteria

Anyone who completes Mod 1 is considered “in the cohort,” regardless of their current status.

The exceptions are those who don’t meet the age criteria or haven’t earned/aren’t working toward a qualifying degree.

Historical Eligibility

Cancer exclusion: If they reported cancer hx in Mod 1, they were deemed ineligible. Cancer restriction removed 8/2019. LS used to not display the second half of Mod 1 if cancer was reported. This was also changed 8/2019.

Degree: We would ask what degrees people had, but generally people used to not be excluded based on degree. Now (since 10/28/21), they must have one of the degrees on the new registration page to be eligible.