Cognition Intervention Study Dortmund- Glycemic Index (CogniDo GI)

NCT ID: NCT02763371

Last Updated: 2016-05-05

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: NA
• Total Enrollment: 200 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2016-04-30
• Study Completion Date: 2016-12-31

Brief Summary

The Cognition Intervention Study Dortmund (CogniDo) and the Cognition Intervention Study Dortmund PLUS (CogniDo PLUS) investigated the short-term effects of having school lunch versus skipping it on children's basal (CogniDo) and executive (CogniDo PLUS) cognitive functions in the afternoon. The The Cognition Intervention Study Dortmund Continued (Coco) connected this two previous studies and investigates the effect of having school lunch versus skipping it on children's basal and executive cognitive functions later in the afternoon. The present study the Cognition Intervention Study Dortmund- Glycemic Index (CogniDo GI) examines the influence of the gylcemic index of lunch on cognitive performance of school children in the afternoon.

Detailed Description

Glucose is the main fuel of the human brain. However, which impact the glycemic index of lunch has on cognitive performance is not clear. A recently published review by Philippou and Constantinou suggested cautiously that a low-GI meal may favor cognitive functions in adults, but note that their findings are inconclusive due to differences in study design, study sample (e.g. size, age), time of testing and the cognitive domain being examined. Because of cerebral particularities, children may react highly sensitive to variations of glycose supply. Therefore, an optimised composition of meals at favourable mealtime should be considered for optimal cognitive performance. The increasing implementation of all-day schools in Germany requires the children's catering for lunch at school.

As prior intake of food can have an influence on the physiological effect of test meal, the children's dietary intake in the mid-morning is standardized. The intervention is integrated in everyday school life: 9.15 a.m. standardized snack within the frame of the regular break, 9.45 a.m. to 12.25 p.m. everyday school life, 12.25 p.m. lunch with a high GI-rice or a low GI-rice and a water beverage, 12.45 p.m. to 13.15 p.m. regular lunch break, 13.15 p.m. computerized tests of executive cognitive and basal (alertness) functioning.

Parameters of cognition with relevance to everyday school life are measured by a computerized test program developed by the Institute of Working Learning and Aging (ALA). Usual eating behaviour, sleep behaviour, physical activity and parental education were determined as control variables by questionnaires for children, parents.

Conditions

Cognitive Function

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Blinding Strategy: NONE

Study Groups

Dietary: high GI lunch

High GI-rice lunch ad libitum on test day 1 and low GI-rice lunch on test day 2. Water at libitum was constantly available on both days.

Group Type: EXPERIMENTAL

Dietary: high GI lunch

Intervention Type: OTHER

High GI: High-GI rice lunch ad libitum on test day 1 and low GI-rice lunch on test day 2. Water at libitum was constantly available on both days.

Dietary: low GI lunch

Low GI-rice lunch ad libitum on test day 1 and high GI-rice lunch on test day 2. Water at libitum was constantly available on both days.

Group Type: EXPERIMENTAL

Dietary: low GI lunch

Intervention Type: OTHER

Low-GI: Low GI-rice lunch ad libitum on test day 1 and high GI-rice lunch on test day 2. Water at libitum was constantly available on both days.

Interventions

Dietary: high GI lunch

High GI: High-GI rice lunch ad libitum on test day 1 and low GI-rice lunch on test day 2. Water at libitum was constantly available on both days.

Intervention Type: OTHER

Dietary: low GI lunch

Low-GI: Low GI-rice lunch ad libitum on test day 1 and high GI-rice lunch on test day 2. Water at libitum was constantly available on both days.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• all fifth and sixth grade students of Gesamtschule Berger Feld with the consent of parents and child

Exclusion Criteria

• Metabolic diseases or special diet

• Minimum Eligible Age: 10 Years
• Maximum Eligible Age: 14 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Research Institute of Child Nutrition, Dortmund

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Mathilde Kersting, Prof

Role: STUDY_CHAIR

Research Institut of Child Nutrition

Locations

Germany Research Institute of Child Nutrition

Dortmund, Dortmund, Germany

Site Status: RECRUITING

Countries

Germany

Central Contacts

Mathilde Kersting, Prof

Role: CONTACT

kersting@fke-do.de

023179221018

Facility Contacts

Mathilde Kersting, Professor

Role: primary

kersting@fke-do.de

023179221018

Other Identifiers

COG0416DO

Identifier Type: -

Identifier Source: org_study_id