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Cognition Intervention Study Dortmund- Glycemic Index (CogniDo GI) (CogniDo-GI)

3 maj 2016 uppdaterad av: Research Institute of Child Nutrition, Dortmund
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.

Studieöversikt

Status

Okänd

Betingelser

Intervention / Behandling

Detaljerad beskrivning

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.

Studietyp

Interventionell

Inskrivning (Förväntat)

200

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studiekontakt

Studieorter

  • Tyskland
      • Dortmund, Tyskland, 44225
        • Rekrytering
        • Germany Research Institute of Child Nutrition
        • Kontakt:

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

10 år till 14 år (Barn)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Beskrivning

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

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Tilldelning: Randomiserad
  • Interventionsmodell: Crossover tilldelning
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: 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.
Övrig: 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.
Experimentell: 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.
Övrig: 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.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Shifting: Change of total reaction time for a) [ms]
Tidsram: participants were tested on two test days (T1 and T2) with one week wash out

Measuring global task-switching costs by a three-part computer trial.

a. Non-switch: digits from 1 to 26 in random order are to put in order. b. Non-switch: Same as a) with letters from A to Z c. switch: digits 1 to 13 and letters A to M in random order to put in altering ascending order (digit, letter)
participants were tested on two test days (T1 and T2) with one week wash out
Shifting: Change of total reaction time for b) [ms
Tidsram: participants were tested on two test days (T1 and T2) with one week wash out

Measuring global task-switching costs by a three-part computer trial.

a. Non-switch: digits from 1 to 26 in random order are to put in order. b. Non-switch: Same as a) with letters from A to Z c. switch: digits 1 to 13 and letters A to M in random order to put in altering ascending order (digit, letter)
participants were tested on two test days (T1 and T2) with one week wash out
Shifting: Change of total switch-costs [ms
Tidsram: participants were tested on two test days (T1 and T2) with one week wash out

Measuring global task-switching costs by a three-part computer trial.

a. Non-switch: digits from 1 to 26 in random order are to put in order. b. Non-switch: Same as a) with letters from A to Z c. switch: digits 1 to 13 and letters A to M in random order to put in altering ascending order (digit, letter)
participants were tested on two test days (T1 and T2) with one week wash out
updating: change of ratio of missing [%]
Tidsram: participants were tested on two test days (T1 and T2) with one week wash out
Continuous monitoring and quick addition or deletion of contents within the working memory A sequence of 106 items (pictures of fruit and vegetables) is shown to the participants. A reaction is required if the actual shown item was equal to the item shown in the second to last.
participants were tested on two test days (T1 and T2) with one week wash out
updating: change of ratio of false alarms [%]
Tidsram: participants were tested on two test days (T1 and T2) with one week wash out
Continuous monitoring and quick addition or deletion of contents within the working memory A sequence of 106 items (pictures of fruit and vegetables) is shown to the participants. A reaction is required if the actual shown item was equal to the item shown in the second to last.
participants were tested on two test days (T1 and T2) with one week wash out
updating: change of mean reaction time [ms]
Tidsram: participants were tested on two test days (T1 and T2) with one week wash out
Continuous monitoring and quick addition or deletion of contents within the working memory A sequence of 106 items (pictures of fruit and vegetables) is shown to the participants. A reaction is required if the actual shown item was equal to the item shown in the second to last.
participants were tested on two test days (T1 and T2) with one week wash out
tonic alertness: change of mean reaction time [ms]
Tidsram: participants were tested on two test days (T1 and T2) with one week wash out
measures the level of alertness in response to a simple visual stimulus. Mean reaction time
participants were tested on two test days (T1 and T2) with one week wash out
tonic alertness: change of deviation of reaction time [ms]
Tidsram: participants were tested on two test days (T1 and T2) with one week wash out
measures the level of alertness in response to a simple visual stimulus. Deviation of reaction time
participants were tested on two test days (T1 and T2) with one week wash out
tonic alertness:change of numbers of omission errors [n]
Tidsram: participants were tested on two test days (T1 and T2) with one week wash out
measures the level of alertness in response to a simple visual stimulus. subsidiary outcome is the numbers of omission errors.
participants were tested on two test days (T1 and T2) with one week wash out
tonic alertness:change of numbers of commission errors [n]
Tidsram: participants were tested on two test days (T1 and T2) with one week wash out
measures the level of alertness in response to a simple visual stimulus. subsidiary outcome is the numbers of comission errors.
participants were tested on two test days (T1 and T2) with one week wash out

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Research Institute of Child Nutrition, Dortmund

Utredare

  • Studiestol: Mathilde Kersting, Prof, Research Institut of Child Nutrition

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

1 april 2016

Primärt slutförande (Förväntat)

1 juni 2016

Avslutad studie (Förväntat)

1 december 2016

Studieregistreringsdatum

Först inskickad

28 april 2016

Först inskickad som uppfyllde QC-kriterierna

3 maj 2016

Första postat (Uppskatta)

5 maj 2016

Uppdateringar av studier

Senaste uppdatering publicerad (Uppskatta)

5 maj 2016

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

3 maj 2016

Senast verifierad

1 maj 2016

Mer information

Termer relaterade till denna studie

Nyckelord

Andra studie-ID-nummer

  • COG0416DO

Plan för individuella deltagardata (IPD)

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Nej

Läkemedels- och apparatinformation, studiedokument

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Nej

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