PUB708 Quantitative Research Methods

PUB708 Quantitative Research Methods

PUB708 Quantitative Research Methods

Question:

To conduct the study described in your proposal (with appropriate changes if required based on feedback from your proposal), collect the data, describe, analyse, interpret, present and discuss findings.

Answer:

Introduction

It’s been a long time since the problem could have a negative impact on the cardiovascular system. Some transversal studies have shown a positive trend in coffee consumption and blood pressure. At least one prospective study involved increased blood pressure. However, inferences should be cautious about causality due to other factors arising from observational studies.

Experimental studies are the best way to determine if there is a relationship and it is an intervention, relevant therapeutic effect of coffee was researched by Lopez-Garcia et al [1]. However, most of these studies were small and could not deliver results to the final, to find the effect of coffee on the subject and whether drinking amount is controversial [2, 3]. The combination of clinical trial in the present work allows for the investigation of the results of gender and age of the participants [4]. In this context, the scholar presented the results of a meta-analysis of 50 clinical studies on the impact of coffee. The present research scrutinized the effect of coffee on participants by investigating two following hypotheses.

  1. H0: Coffee drinking does not have any significant impact on Systolic blood pressure.

HA: Coffee drinking has significant impact on Systolic blood pressure.

  1. H0: Coffee drinking does not have any significant impact on Diastolic blood pressure.

HA: Coffee drinking has significant impact on Diastolic blood pressure.

  • H0: Age of the participants and difference in Diastolic blood pressure do not impact the change in Systolic blood pressure.

HA: Age of the participants and difference in Diastolic blood pressure significantly impact the change in Systolic blood pressure.

  1. H0: Gender of the participants and difference in Diastolic blood pressure do not impact the change in Systolic blood pressure.

HA: Gender of the participants and difference in Diastolic blood pressure significantly impact the change in Systolic blood pressure.

Research Methodology

The scholar advertised the research plan in the University notice board. A pre-formatted form with information fields on biological vitals were circulated to the enrolled applicants through emails. Finally, the participants were selected from total 89 applicants. Applicants with high or low blood pressure were excluded from the study. The scholar also tracked the profile of the applicants and excluded alcohol or substance addicted candidates. At last, 50 participants were selected with average systolic and diastolic blood pressures as 124.4 mm Hg (SD = 12.05) and 79.64 mm Hg (SD = 7.44). Average age of the participants was 25.36 years (SD = 7.03), where females were aged between 19 – 62 years (N = 23, M = 26.78, SD = 9.13), and males were aged between 14 – 38 years (N = 27, M = 24.15, SD = 4.38).

Experiment was introduced after signing of a university approved ethics form. Information about age, gender, primary blood pressure, coffee consumption, coffee volume, and final blood pressure were recorded. Each participant drank a 250 ml hot coffee, and after 3 minutes blood pressure was recorded.

A quantitative analysis of pre and post coffee administration blood pressures by paired t-test was done in SPSS 20 software. The initial blood pressures were considered as control measures, whereas post coffee drinking blood pressures were considered as experimental measures. Correlation between the Systolic and Diastolic pressures was evaluated with linear regression model describing the structure of the relation.

Systolic and Diastolic pressures of the participants for the “Elder” (26 – 62) and “Adult” (14 – 25) blood pressure descriptive have been provided in Table 1.

Initial average Systolic blood pressure for adult and elder participants was found to be almost similar. No noteworthy difference was noted between them regarding the measure.

Initial average Diastolic blood pressure for elder participants (M = 82.37) was found to be greater than that of the adult participants (M = 77.97). The difference in the measure was significant between the two age groups.

Final (after experiment) average Systolic blood pressure for elder participants (M = 128.32) was found to be greater than the adults (M = 122.29). A noteworthy difference was noted between them regarding the measure.

Final (after experiment) average Diastolic blood pressure for elder participants (M = 83.42) was found to be greater than the adults (M = 78.10). A noteworthy difference was noted between them regarding the measure. Effect of Coffee on blood pressure was observed to be greater for the elder participants.

Systolic and Diastolic pressures of the participants were measured, and the gender wise descriptive measures have been listed in Table 2.
Initial average Systolic blood pressure for male participants (M = 125.48) was found to greater than that of the female participants (M = 123.22). The difference noted between the two genders required to be assessed by inferential measure.Initial average Diastolic blood pressure for female participants (M = 80.22) was found to almost equal to that of the male participants (M = 79.15). No noteworthy difference noted between the two genders regarding the measure.

Final (after experiment) average Systolic blood pressure for male participants (M = 80.22) was found to be greater than the females (M = 80.00). No noteworthy difference was noted between them regarding the measure.

PUB708 Quantitative Research Methods