Randomized controlled trial to detect effectiveness of caffeine for college students -part of the public health lectures and training in 2015-

Randomized controlled trial to detect effectiveness of caffeine for college students -part of the public health lectures and training in 2015- - Coffee trial in public health class 2015

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000019645

Enrollment

Registered

2015-11-05

Start date

2015-11-09

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy Adults

Interventions

freeze dried instant coffee with caffeine administration period:1day(1time) dose:2g(with 140ml water) freeze dried instant decaf coffee administration period:1day(1time) dose:2g(with 140ml water)

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 4th grade student belong school of medicine, Keio university

Exclusion criteria

Exclusion criteria: pregnant or probably pregnant women lactating women those who cannot drink coffee those who never drank coffee those who have a history of stomach ulcer those who have a history of hyperacidity

Design outcomes

Primary

Measure	Time frame
Numbers of correct answers by summation carried out on a 10 by 10 grid of numbers in 2 minutes. Difference between before and 30 min after drinking randomized allocated coffee or decaf.	—

Countries

Japan

Contacts

Public ContactAyano Takeuchi

Keio University Department of Preventive Medicine and Public health, School of Medicine

ayanotakeuchi@keio.jp0353633758

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026