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The short-term effects of coffee on heart rate and blood pressure

The short-term effects of coffee on heart rate and blood pressure in habitual consumers among lecturers in Faculty of Health Sciences UiTM Puncak Alam: A Randomised Controlled Trial (RCT) Study

Status
Not yet recruiting
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12623001083684
Enrollment
36
Registered
2023-10-13
Start date
2023-11-06
Completion date
2023-11-10
Last updated
2023-10-23

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

Conditions

None listed

Brief summary

Hypotheses 1) Hypotheses 1 Ho - There is no significant difference between short-term effects of caffeinated and decaffeinated coffee on heart rate. Ha - There is a significant difference between short-term effects of caffeinated and decaffeinated coffee on heart rate. 2) Hypotheses 2 Ho - There is no significant difference between short-term effects of caffeinated and decaffeinated coffee on blood pressure. Ha – There is a significant difference between short-term effects of caffeinated and decaffeinated coffee on blood pressure. 3) Hypotheses 3 Ho - There is no significant difference on heart rate and blood pressure difference between caffeinated and decaffeinated coffee among habitual coffee consumers. Ha - There is a significant difference on heart rate and blood pressure between caffeinated and decaffeinated coffee among habitual coffee consumers. Research Objectives 1) To investigate short term effects of caffeinated and decaffeinated coffee on heart rate. 2) To check for short term effects of caffeinated and decaffeinated coffee on blood pressure. 3) To investigate on the association of caffeinated and decaffeinated coffee on heart rate and blood pressure between habitual coffee consumers. Significance of Study: Studies on short term effects of coffee on heart rate and blood pressure are still lacking in Malaysia although the number of coffee consumption every year is keep increasing. The finding of this study will help in identifying the short-term effects of coffee on heart rate and blood pressure and will give knowledge and awareness regarding impact of coffee consumption towards health. Furthermore, this study will help in investigating relation of effect of caffeinated and decaffeinated coffee on heart rate and blood pressure among habitual coffee consumers. Study design: This study is a quantitative research study design. A double blinded randomized control trial (RCT) study will be used to conduct this study. RCT is a suitable design to use in this study as it functions to determine whether cause and effect relation are existing between the intervention by randomly assigned individual or groups to the intervention control study. This study will follow indications of the Consolidated Standards of Reporting Trial (CONSORT) Statement. Population: The participants involve in this study is lecturer in Faculty of Health Science, UiTM Puncak Alam. Study setting: The study will be conducted at Faculty of Health Sciences 6, UiTM Puncak Alam. This study’s target population is lecturer who are habitual or non-habitual coffee consumer in Faculty of Health Science, UiTM Puncak Alam.

Interventions

There are two types of coffee which are caffeinated and decaffeinated coffee will be used in this study. The recruitment of the participant will be conducted based on the inclusion and exclusion criteria. Randomization and allocation concealment were conducted after obtaining informed consent. The participants will be randomized using block randomization (1:1). The random alphabet A and B will each be placed into an envelope. The envelopes were then distributed to the participants on a first com

There are two types of coffee which are caffeinated and decaffeinated coffee will be used in this study. The recruitment of the participant will be conducted based on the inclusion and exclusion criteria. Randomization and allocation concealment were conducted after obtaining informed consent. The participants will be randomized using block randomization (1:1). The random alphabet A and B will each be placed into an envelope. The envelopes were then distributed to the participants on a first come first serve basis during recruitment. Participants with the alphabet A received a cup of coffee A whereas participants with the alphabet B received a cup of coffee B. The researcher along with a research supervisor will conduct this procedure. Both types of coffee were prepared and provided by a local company. To maintain allocation concealment, both coffees were made to appear similar (sachet type, sachet size, sachet colour, amount of coffee, and colour of coffee). The only exception is the label (code) attached to the front of the sachet, A for coffee A and B for coffee B. This was a double-blind study where both participants and experimenters were not exposed to the code. Heart rate and blood pressure reading of participants will be taken before carrying out the experiment by using CHOICEMMED pulse oximeter and Novoplus Blood pressure monitor. Coffee will be made by the experimenter by using 200ml of hot water, caffeinated and decaffeinated coffee sachet that are provided by supervisor, and 250ml cups. Participants then drinking the coffee and any side effects will be observed. After 15minutes of consuming, heart rate reading will be taken using the same CHOICEMMED pulse oximeter. Blood pressure reading will be taken after 1 hour consuming the coffee. Researcher will collect the data until having enough participants, n=30.

Sponsors

NOVA LABORATORIES SDN. BHD.
Lead SponsorCommercial sector/Industry

Study design

Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Prevention
Masking
Blinded (masking used) (Subject, Caregiver)

Eligibility

Sex/Gender
All
Age
28 Years to 55 Years
Healthy volunteers
Yes

Inclusion criteria

1) Age from 28-55 years old. 2) Both female and male. 3) Free from hypertension and heart problems. 4) Free from any chronic disease

Exclusion criteria

1) Caffeine intolerance. 2) Pregnant women. 3) Breastfeeding mothers.

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026