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This study will compare eating behaviors and measures of hunger and fullness between day and night workers in order to better understand why night workers are at increased risk for obesity and related diseases.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Day worker | Active Comparator | Men and women who work only day shift for at least 3 consecutive days of the week |
|
| Night worker | Active Comparator | Men and women who work only night shift for at least 3 consecutive days of the week |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Portion size | Behavioral | The amount of food served (g) at the first two meals of each day. These amounts will vary across 4 weeks. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Food intake | Food by weight (g) in response to variations in portion served | 24-hours intake period |
| Energy intake | Food by energy (kcal) in response to variations in portion served | 24-hours intake period |
| Energy density consumed | Energy density consumed (kcal/g) in response to variations in portion served | 24-hours intake period |
| Measure | Description | Time Frame |
|---|---|---|
| Appetite-regulating hormones | Appetite-regulating hormones, including Glucagon-like-peptide 1 (GLP-1) and ghrelin will be analyzed from plasma from whole blood samples collected while fasted and at 30, 60, 90, and 120 min postprandial. Area under the curve of plasma concentrations will be calculated for each individual appetite-regulating hormone | 2-hours measurement period |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Faris M Zuraikat, PhD | Columbia University | Principal Investigator |
| Marie-Pierre St-Onge, PhD | Columbia University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Columbia University Irving Medical Center | New York | New York | 10032 | United States |
De-identified individual participant data (IPD) will be shared with other researchers upon request.
After the study is completed (data collection, analysis, publication) and after any subsequent funding applications have been submitted.
Upon request
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| ID | Term |
|---|---|
| D005247 | Feeding Behavior |
| ID | Term |
|---|---|
| D001522 | Behavior, Animal |
| D001519 | Behavior |
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| ID | Term |
|---|---|
| D064787 | Portion Size |
| ID | Term |
|---|---|
| D004032 | Diet |
| D009747 | Nutritional Physiological Phenomena |
| D000066888 | Diet, Food, and Nutrition |
| D010829 | Physiological Phenomena |
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This is a mixed design with two participant groups (between-subject), day and night workers, each being exposed to 4 levels of food portion size (within-subjects factor)
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Statistician will be blinded to participant group and condition.
| Hunger and fullness | Subjective measures related to hunger, fullness, and prospective consumption will be measured before and after meals via visual analog scales. The range of scores are 0 mm to 100 mm, with higher scores indicating greater feelings of the corresponding measure (e.g. greater hunger). Post-meal measures, adjusted for the corresponding pre-meal measure, will be analyzed as individual outcomes. Area under the curve will also be calculated for each measure. | 24-hours measurement period |