Trial Outcomes & Findings for Snack Food Reinforcement in Obese and Non-obese Women (NCT NCT00837694)

Results Overview

Participants were asked to click a button on a computer mouse and after a certaion number of responses, participants would receive a point. After 5 points, the participants received a portion of snack food.

Recruitment status

COMPLETED

Target enrollment

65 participants

Primary outcome timeframe

During 2nd and 3rd visits

Results posted on

2019-08-01

Participant Flow

Women were recruited from flyers poster around campus. Interested participants called the lab and were screened by telephone.

Exclusionary criteria included smoking, current dieting, medications that could affect appetite, medical conditions that limited physical activity, allergies to or self-reported dislike of study foods.

Participant milestones

Participant milestones
Measure	Non-Obese/0 kcal Non-obese participants that received no snack food to consume for two weeks.	Non-Obese/100 kcal Non-obese participants that received a 100 kcal portion of food to consume daily for two weeks.	Non-obese/300 kcal Non-obese participants that received a 300 kcal portion of food to consume daily for two weeks.	Obese/0 kcal Obese participants that received no food to consume for two weeks.	Obese/100 kcal Obese participants that received a 100 kcal portion of food to consume daily for two weeks.	Obese/300 kcal Obese individuals who received a 300 kcal portion of food to consume for 2 weeks.
Overall Study STARTED	10	11	10	11	12	11
Overall Study COMPLETED	8	11	8	10	11	10
Overall Study NOT COMPLETED	2	0	2	1	1	1

Reasons for withdrawal

Reasons for withdrawal
Measure	Non-Obese/0 kcal Non-obese participants that received no snack food to consume for two weeks.	Non-Obese/100 kcal Non-obese participants that received a 100 kcal portion of food to consume daily for two weeks.	Non-obese/300 kcal Non-obese participants that received a 300 kcal portion of food to consume daily for two weeks.	Obese/0 kcal Obese participants that received no food to consume for two weeks.	Obese/100 kcal Obese participants that received a 100 kcal portion of food to consume daily for two weeks.	Obese/300 kcal Obese individuals who received a 300 kcal portion of food to consume for 2 weeks.
Overall Study Lost to Follow-up	2	0	2	1	1	1

Baseline Characteristics

Snack Food Reinforcement in Obese and Non-obese Women

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure	Non-Obese/0 kcal n=10 Participants Non-obese participants that received no snack food to consume for two weeks.	Non-Obese/100 kcal n=11 Participants Non-obese participants that received a 100 kcal portion of food to consume daily for two weeks.	Non-obese/300 kcal n=10 Participants Non-obese participants that received a 300 kcal portion of food to consume daily for two weeks.	Obese/0 kcal n=11 Participants Obese participants that received no food to consume for two weeks.	Obese/100 kcal n=12 Participants Obese participants that received a 100 kcal portion of food to consume daily for two weeks.	Obese/300 kcal n=11 Participants Obese individuals who received a 300 kcal portion of food to consume for 2 weeks.	Total n=65 Participants Total of all reporting groups
Age, Categorical <=18 years	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants	0 Participants n=4 Participants	0 Participants n=21 Participants	0 Participants n=8 Participants	0 Participants n=8 Participants
Age, Categorical Between 18 and 65 years	10 Participants n=5 Participants	11 Participants n=7 Participants	10 Participants n=5 Participants	11 Participants n=4 Participants	12 Participants n=21 Participants	11 Participants n=8 Participants	65 Participants n=8 Participants
Age, Categorical >=65 years	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants	0 Participants n=4 Participants	0 Participants n=21 Participants	0 Participants n=8 Participants	0 Participants n=8 Participants
Age, Continuous	27.57 years STANDARD_DEVIATION 7.37 • n=5 Participants	26.57 years STANDARD_DEVIATION 9.49 • n=7 Participants	29.13 years STANDARD_DEVIATION 7.37 • n=5 Participants	31.4 years STANDARD_DEVIATION 2.69 • n=4 Participants	37.82 years STANDARD_DEVIATION 2.85 • n=21 Participants	38.79 years STANDARD_DEVIATION 3.72 • n=8 Participants	32.13 years STANDARD_DEVIATION 10.7 • n=8 Participants
Sex: Female, Male Female	10 Participants n=5 Participants	11 Participants n=7 Participants	10 Participants n=5 Participants	11 Participants n=4 Participants	12 Participants n=21 Participants	11 Participants n=8 Participants	65 Participants n=8 Participants
Sex: Female, Male Male	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants	0 Participants n=4 Participants	0 Participants n=21 Participants	0 Participants n=8 Participants	0 Participants n=8 Participants
Race/Ethnicity, Customized Minority	1 participants n=5 Participants	1 participants n=7 Participants	2 participants n=5 Participants	6 participants n=4 Participants	4 participants n=21 Participants	3 participants n=8 Participants	17.0 participants n=8 Participants
Race/Ethnicity, Customized Non-Minority	9 participants n=5 Participants	10 participants n=7 Participants	8 participants n=5 Participants	5 participants n=4 Participants	8 participants n=21 Participants	8 participants n=8 Participants	48.0 participants n=8 Participants

PRIMARY outcome

Timeframe: During 2nd and 3rd visits

Participants were asked to click a button on a computer mouse and after a certaion number of responses, participants would receive a point. After 5 points, the participants received a portion of snack food.

Outcome measures

Outcome measures
Measure	Non-Obese/0 kcal n=8 Participants Non-obese participants that received no snack food to consume for two weeks.	Non-Obese/100 kcal n=11 Participants Non-obese participants that received a 100 kcal portion of food to consume daily for two weeks.	Non-obese/300 kcal n=8 Participants Non-obese participants that received a 300 kcal portion of food to consume daily for two weeks.	Obese/0 kcal n=10 Participants Obese participants that received no food to consume for two weeks.	Obese/100 kcal n=11 Participants Obese participants that received a 100 kcal portion of food to consume daily for two weeks.	Obese/300 kcal n=10 Participants Obese individuals who received a 300 kcal portion of food to consume for 2 weeks.
Number of Responses Made by Clicking a Mouse Button for Food Number of responses at baseline	397.63 Number of button presses Standard Error 307.6	288.36 Number of button presses Standard Error 68.44	429.5 Number of button presses Standard Error 307.7	213.2 Number of button presses Standard Error 72.51	448.36 Number of button presses Standard Error 217.49	502.00 Number of button presses Standard Error 257.05
Number of Responses Made by Clicking a Mouse Button for Food Number of responses visit 3	170.38 Number of button presses Standard Error 77.48	227.27 Number of button presses Standard Error 50.80	115.25 Number of button presses Standard Error 46.82	147.2 Number of button presses Standard Error 27.23	468.18 Number of button presses Standard Error 298.40	1063.6 Number of button presses Standard Error 670.32

PRIMARY outcome

Timeframe: visits 1, 2, and 3 plus on the phone throughout the study.

energy contained in eaten foods and beverages

Outcome measures

Outcome data not reported

SECONDARY outcome

Timeframe: visit 1 and visit 3

body weight

Outcome measures

Outcome data not reported

SECONDARY outcome

Timeframe: visits 1 and 3

height