Analysis of the Effects of Caffeine on cognitive abilities and anxiety
Not Applicable
- Conditions
- Cognitive Abilities, Anxiety and stressF02.463.188F01.470.132
- Registration Number
- RBR-3tnjtq
- Lead Sponsor
- Departamento de Biociências da Universidade Federal de São Paulo - Baixada Santista
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Data analysis completed
- Sex
- Not specified
- Target Recruitment
- Not specified
Inclusion Criteria
healthy volunteers, both genders; age between 18 and 40 years; students of UNIFESP Baixada Santista; minimum of 11 years of school education.
Exclusion Criteria
psychiatric diagnoses; obesity; dyslipidemia; cardiopathy; gestation; intellectual, visual and auditory deficiency; HIV on antiretroviral therapy; cirrhosis; renal failure.
Study & Design
- Study Type
- Intervention
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Expected outcome 1 - An inverted U-shaped quadratic curve in cognitive variables (Rey Auditory Verbal-Learning Test, Stroop Test, Digit Span, Verbal and Semantic Fluency)on caffeine group, using repeated measures ANOVA, considering estatiscally significant P<0,05.;Outcome found 1- the groups did not present a statistically significant difference in the performance of the cognitive tests (Rey Auditory Verbal-Learning Test, Digit Span, and Verbal and Semantic Fluency Test), except for the Stroop Test, that presented significant difference between the groups - Stroop interference index (5.03, 95% CI, 1.67 to 8.39, P = 0.004). The effect size assessed by partial square eta (?²) was 0.136.<br>;Expected outcome 2 – the difference in performance in the Spielberger State Anxiety Inventory will not be statistically significant between groups, repeated measures ANOVA.;Outcome found 2 – there was no difference in performance in the Spielberger State Anxiety Inventory between groups (P=0,388).
- Secondary Outcome Measures
Name Time Method