Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

OBJECTIVES: Determine the prevalence of Vitamin D insufficiency during a Queensland (Qld) winter (June-August 2010).

Identify the determinants of Vitamin D status in an older ambulatory population residing in South East Queensland, and provide someindication of their relative importance to serum 25- Hydroxyvitamin D levels [25 (OH) D].

RATIONALE: Vitamin D plays an essential role in bone metabolism, maintaining bone health, as well as muscle function. Evidence suggests the long term impact of insufficient Vitamin D on calcium absorption may be associated with the development of conditions such as osteoporosis, and an increase in rates of falls and fractures. Other evidence suggests Vitamin D deficiency may be linked with autoimmune diseases, hypertension and various cancers.

Almost all Vitamin D is manufactured in the skin following direct exposure to sunlight (UV-B sunlight). The amount produced will depend on various factors such as the duration of sun exposure, season, and skin colour. Various sun protection practices can also impact on the manufacture of Vitamin D in the skin.

Small amounts of Vitamin D can be derived from dietary sources with major food sources including Vitamin D-fortified dairy products, egg yolks, liver, oily fish and fish oils. Some calcium supplements and most multivitamins contain vitamin D.

The ability to make vitamin D through the skin decreases with age and is lower in those with darker skin compared to those with a fair complexion. People who are housebound and/or experience no sunlight exposure are unable to make vitamin D.

The important role of Vitamin D in maintaining healthy bones and muscle strength is well established; however Vitamin D deficiency may pose health consequences that have yet to be fully appreciated. Maintaining adequate levels of 25 (OH) D throughout the lifespan may help to the reduce risk of various chronic illnesses. Understanding the range of factors that impact on Vitamin D status, particularly during the winter months, has important public health implications.

STUDY DESIGN: A cross-sectional survey was conducted during June-August 2009, to (1) determine the prevalence of Vitamin D insufficiency, and (2) identify the determinants of Vitamin D Status in an older population. 

Your analytical plan should provide a complete, unambiguous ‘recipe’ of how to approach the analysis and reporting of the study – the following headings are suggestions for structuring your plan and to help you address the task in a systematic way. 

Feel free to add more subheadings to your plan, or to change the order if it fits better with the approach you wish to take:
 
RESEARCH problem
:

1) A statement of the scientific hypothesis/hypotheses you have decided to address in your analyses, with a rationale for each.

2) Brief definitions of the study design, sampling strategy, and outcome variable(s)

3) Strategies for data cleaning and checking consistency of problem responses in the given dataset

4) Comment on influence of study design, sampling strategy and scale of measurement of outcome variable, on your choice of analytical approach.

5) Rationale for choice of any exploratory analytical approaches

6) Rationale for choice of any modelling approaches (both statistical method, and model building approach)

7) List of specific models to be fitted and what problem you expect to answer with each 

8) Assumptions to be tested for each analytical approach [and suggested alternative strategies if assumptions are not met]

9) Criteria that will be used for reporting significant associations

10) Dummy tables and/or graphs depicting the style of presentation of results from your proposed analyses. Remember that the format (headings and presentation) must be planned to a high level of reader-friendliness for the report.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M91384

Have any Question? 


Related Questions in Statistics and Probability

A company has 100000 to invest in new rampd projects

A company has $1,00,000 to invest in new R&D projects.  The company wants to determine what set of projects should be selected.   The following table summarizes the initial cost and revenue potential for each of the proj ...

The following electoral method is used to choose the mayor

The following electoral method is used to choose the mayor of Whoville: Every resident ranks the candidates from most preferred to least preferred, and places this ranked list in a ballot box. Each candidate receives a n ...

An airline company is considering a new policy of booking

An airline company is considering a new policy of booking as many as 158 persons on an airplane that can seat only 160. (Past studies have revealed that only 90% of the booked passengers actually arrive for the flight.) ...

Applicationcomparing software development

Application Comparing Software Development Workloads Estimating the cost of developing software in terms of work load is difficult since it is a challenge to quantify the size and complexity of a software system. The art ...

For a regression equation cancellations is my dependent

For a regression equation, "cancellations" is my dependent variable and I want to know how many cancellations will be at 6pm since hour is my independent variable. However, my "hour" variable is in data that ranges from ...

1 how did commerce at this stage of societal development

1. How did commerce at this stage of societal development influence the decisions/actions of governments? Some very specific results of these decisions influenced the circumstances we have today. Be sure to include addit ...

An auditor claims that the average annual salary of a

An auditor claims that the average annual salary of a project manager at a construction company exceeds $82,000. A random sample of 20 project managers had an average salary of $89,600 with a sample standard deviation of ...

Your statistics teacher knowing the power of sampling

Your statistics teacher, knowing the power of sampling, decides to use only 3 of your 5 quiz grades in assigning your grade for the course, chosen at random. Your quiz average using all 5 quizzes is 81.6, with a standard ...

Use the inverse transform method to generate a sample of

Use the inverse transform method to generate a sample of the exponential distribution with parameter θ, which is given by its density             1/θe -x/θ   for x ≥ 0 f(x) =             0             for x where θ is a ...

One thousand people are enrolled in a 10 year cohort study

One thousand people are enrolled in a 10 year cohort study. At the start of the study, 100 have diagnosed CVD. Over the course of the study, 80 people who were free of CVD at baseline develop CVD. What is the cumulative ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro