DBBO Night Shift Support Study
Completed
- Conditions
- ot applicable
Recruitment & Eligibility
- Status
- Completed
- Sex
- Not specified
- Target Recruitment
- 98
Inclusion Criteria
Healthy volunteers from the Netherlands Armed Forces Security Agency aged 18 to 67 years.
Exclusion Criteria
Individuals with diseases of the retina (e.g., macular degeneration) were excluded from the study, as were security guards who were not capable of fulfilling their duty tasks without wearing their own glasses.
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method The primary outcome measure of the current study is need for recovery, as measured with the 11-item Need for Recovery Scale from the Dutch Questionnaire on the Experience and Evaluation of Work (Van Veldhoven, & Broersen, 2003). Higher scores indicate an increased need for recovery.
- Secondary Outcome Measures
Name Time Method Secondary outcome measures include fatigue, motivation, concentration, and physical activity, measured with the Checklist Individual Strength (Beurskens et al., 2000). A higher compound score refer to an increase in fatigue, and a decrease in motivation, concentration, and physical activity. Furthermore, indications of stress and (lack of) physiological recovery are measured using the parameters Stress Level and Body Battery from the Garmin Vivo Smart 4 fitness tracker (Firstbeat, 2019). These parameters are derived from a combination of heart rate, heart rate variability, respiratory rate, and duration and intensity of body movements. As a covariate, chronotype is measured using one item of the reduced Morningness–Eveningness Questionnaire (Adan & Almirall, 1991).