Effects of Night Shift Work on Bone Health
Skeletal Effects of Chronic Night Shift (ACORN Study)
This study looks at how working night shifts affects bone health in nurses compared to those who work during the day.
Quick facts
| Study type | Observational |
|---|---|
| Enrollment | 40 (estimated) |
| Ages | 20 Years to 50 Years |
| Sex | All |
| Sponsor | University of Colorado, Denver Academic / other |
| Locations | 1 site (Aurora, Colorado) |
| Trial ID | NCT05091021 on ClinicalTrials.gov |
What this trial studies
This observational study aims to assess the impact of chronic night shift work on bone health among nurses by measuring changes in bone turnover markers, bone mineral density, and bone microarchitecture over one year. The study compares the bone health indices of nurses working night shifts to those working day shifts. Participants will be healthy, nonpregnant adults aged 20-50 who have recently graduated from nursing school and are employed at the University of Colorado Hospital. Data will be collected at baseline and quarterly throughout the year.
Who should consider this trial
Good fit: Ideal candidates for this study are healthy, nonpregnant nurses aged 20-50 who have recently graduated and are beginning their first nursing position.
Not a fit: Patients who are not nurses or those who have significant prior shift work experience may not benefit from this study.
Why it matters
Potential benefit: If successful, this study could provide insights into the long-term effects of night shift work on bone health, potentially leading to improved health guidelines for shift workers.
How similar studies have performed: While there is limited research specifically on the skeletal effects of night shift work, studies on circadian rhythms and health outcomes suggest that this area is underexplored and could yield novel insights.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria * Healthy, nonpregnant adults 20-50 years old who recently (≤6 months) graduated from nursing school and were hired by University of Colorado Hospital for their first nursing position * For women to be eligible, they must be premenopausal, not breastfeeding, not pregnant with no plans to become pregnant during the year of observation and willing/able to maintain their current method of contraception use as detailed below. * Willing and able to travel to/from CU-AMC for study measurements at baseline and quarterly for one full year Exclusion Criteria * Non-nursing school related shift work 1 year prior to study. (note: many nursing students work as an Advanced Care Partner (ACP) or as a Student Nurse Extern (SNE) and these positions will not be considered exclusionary). * Current smokers at baseline (or within the previous year of study). * Individuals who are concurrently participating in another research protocol that would influence their safe participation in this study. For example, participants involved in a study that requires blood draws or ingestion of experimental medication as this would increase the risk of participation in our study and/or compromise study results. * Any clinically significant unstable medical or surgical condition within the last year (treated or untreated), including history of a clinically significant abnormality of the neurological system (including cognitive disorders or significant head injury) or any history of seizure (including febrile seizure-sleep loss has been used clinically to induce seizures in patients with epilepsy). Given the wide range of illnesses that are encountered in medical practice, it would not be possible to provide a comprehensive list of each and every disease that could serve as grounds for exclusion for the subject. However, the following is a list of illness categories that would certainly be grounds for exclusion: Connective Tissue and Joint Disorders; Neurologic/cognitive Disorders; Musculoskeletal Disorders; Immune Disorders; Chronobiologic Disorders; Cardiovascular Disorders; Respiratory Disorders; Kidney Disorders; Infectious Diseases; Hematopoietic Disorders; Neoplastic Diseases; and Endocrine and Metabolic Diseases. * Self-reported or newly diagnosed medical condition that is still being investigated or is not under good control, including those identified on screening labs such as: o Out-of-range values measured on a blood sample such as glucose, TSH, creatinine or hemoglobin, that represent clinically significant abnormalities that may jeopardize safe participation or accuracy of outcome measures, at PI discretion * Any unstable psychiatric condition including but not limited to schizophrenic disorders and previously diagnosed personality disorders. Individuals with a history of anxiety or depression that has not required inpatient treatment and is well controlled without medication or on a stable medication dose will be permitted at the PI's discretion. Additionally, a personal history of limited prior counseling, psychotherapy (e.g., for adjustment reactions) will NOT be exclusionary. * Evaluation of Psychiatric/Psychological Suitability: * Inability to demonstrate a full understanding of the requirements and demands of the study. * Individuals who are unaware of specific psychiatric diagnoses who have a history of having been treated with antidepressants, neuroleptic medications or major tranquilizers will be excluded from study. * Individuals with any clinically significant sleep disorder; Diagnosis or symptoms of sleep disorders (history of significant parasomnia as an adult \[night terrors, frequent sleep walking\], insomnia, including but not limited to hypersomnias such as apnea, periodic limb movements, narcolepsy). Sleep disorders will be screened by self-report and physician interview including use of validated sleep questionnaires (PSQI, Epworth sleepiness scale, and Berlin sleep questionnaire for sleep apnea). * Individuals on medications known to affect bone turnover (e.g., glucocorticoids, osteoporosis medications); * Individuals with eGFR \< 60 mL/min/1.73m2 as this is known to affect CTX measurements. * Symptoms of active illness (e.g., fever) at time of enrollment; note - participant may be studied at a later date if they have not yet started their clinical duties by that time
Where this trial is running
Aurora, Colorado
- CU Anschutz — Aurora, Colorado, United States (Recruiting)
Study contacts
- Principal investigator: Christine M Swanson, MD, MCR — CU Anschutz
- Study coordinator: Alex O Zolnir-Groshong, PharmD, MSHSA
- Email: alex.zolnir-groshong@cuanschutz.edu
- Phone: 303-724-8966
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.