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Power calculation

£20-250 GBP

Closed
Posted almost 3 years ago

£20-250 GBP

Paid on delivery
Please can you assist with devising a power calculation, also if we statistical support for a research project, how much do you charge? The study is RCT looking at vaginal laser vs sham for post-menopausal women with recurrent UTI. This is what I have currently written – is this nonsense? This is a proof-of-concept trail but has been modelled against previous published studies which has used the same intervention. Dryness and dyspareunia have previously been used as the primary outcomes with previously published data on lasers. The sample size estimation was conducted using mean improvement of 10-cm VAS for dryness and dyspareunia derived from two previously published studies (16, 19). The clinically acceptable margin was determined at 10% (1 cm). Hence, a sample size of 40 patients per group will establish a non-inferiority trial at a power of 80% and level of significance 0.05. Considering an expected average drop-out rate 10%, 44 participants will be required per group and 88 participants in total. As this is proof-of concept trial half of this participants will be recruited, 22 participants per group, 44 participants in total. Interim analysis will be made following the 6-month follow-up using the primary outcome “To determine and compare the incidence of symptomatic antibiotic treated UTI during at 6-month follow-up”, the sample size will then be recalculated and adjusted accordingly. Should it exceed total 100 participants further ethical approval will be obtained. The sample size was calculated by an independent statistician using the formula for non-inferiority trials for continuous variables provided in the article of Zhong B (26). This is a relative new area with no completed studies yet looking at change of UTI incidence as the primary outcome – Here is an abstract reporting interim analysis can we use this? Our null-hypothesis is that UTI incidence will increase with laser treatment Target improvement <1 UTI in 6 months.
Project ID: 30531027

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14 proposals
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Active 3 yrs ago

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14 freelancers are bidding on average £135 GBP for this job
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Hi, I have 10+ experience in data analysis and have done power analysis many times. But it is strangely that you stated that you have calculated sample size. Usually it based on that fact that planned statistical test will provide at least statistical power 0.8. In any case I could help you with power analysis (recalculated it using sample size pre-determined by you). Also I could assist with anu statistical analysis. I have experience in similar projects (medical studies). Usually, full analysis - 350-500 GBP depending on analysis depth and volume. Please let me know if you are interested in my proposal. Regards, Alex.
£200 GBP in 7 days
5.0 (72 reviews)
7.5
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Esteemed employer, I hold a Master's degree in statistics making me a suitable person for your project. I have more than 3 years of professional experience in statistical analysis. Besides, I have skills in Data Processing Excel Statistics R Programming Language Statistical Analysis Kindly see my profile reviews to have an insight into what I will do for you. Thanks.
£100 GBP in 2 days
4.9 (201 reviews)
7.0
7.0
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A professional statistical analyst seeking opportunity to provide highest quality services in the following areas of Statistics and Econometric. So get your statistical job done here ! I can do: Survey data analysis, Analysis driven report writing and presentation Academic data analysis and report writing. I have expertise on SPSS, STATISTICA, SAS, Eviews, Minitab, SPSS AMOS, Mathematica and MS Excel.
£200 GBP in 3 days
4.7 (94 reviews)
6.2
6.2
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I'm an exceptionally good statistician with vast experience and expertise both in qualitative and quantitative research and data analysis. I'm also an academic research writer. I'm liberal, thus can work in variety of fields.
£200 GBP in 3 days
5.0 (15 reviews)
4.1
4.1
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Dear client, I am Jack201307. Thank you very much for posting the project “Power calculation”. I can calculate power, and verify it. Recently I successfully finished more than 100 projects relevant to yours on this and other freelance websites; they were related to almost all branches of Statistics and Data Science, including (logistic) regression, survival analysis (Cox PH model, etc.), mixed (multilevel) model, statistical tests and inferences, time series analysis (ARIMAX model, etc.), predictive models (decision tree, neural network, etc.), etc. Please see my profile on this website; many more feedbacks are also available. Partly, my experience, skills and knowledge include: * 10+ years of experience with data manipulating, querying, analyzing, mining, and modeling. * 10+ years of teaching experience in universities as an associate professor. * Both Master Degree (3 years) and Bachelor Degree (4 years) in Applied Mathematics and Statistics * SAS Certified both Base and Advanced Programmer for SAS 9 credentials, obtained in Toronto of Canada * familiar with many applications, such as MATLAB, SPSS, R, Excel * working experience in professional marketing research companies Thank you very much for your time!
£110 GBP in 4 days
5.0 (8 reviews)
4.3
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Hi, I would suggest you to read about OC Curves and Data Distributions before calculating the sample size because Sample is a picture of Population you cannot risk that, I would suggest to use 2 to 3 methods and take mean to be used as Sample Size, apart from that if you have data we can mine the data do ANOVA, Fit Regression or do machine learning for your target variable and analyse the null hypothesis Contact is Chat and lets discuss more
£100 GBP in 10 days
5.0 (4 reviews)
3.2
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Hi, I have reviewed your statistical analysis requirements thoroughly. This is the work our team has completed very perfectly many times before. We have an expert team that is very fluent in using SPSS, Statistics, R programming, Regression analysis, cluster analysis, etc. They can do all these works using various software tools like SPSS, Minitab, SATA, Microsoft Excel, Python, and R. Our experts are also very good in academic writing and interpretation of statistical results and graphs. We are professionals so we can complete your work very perfectly. We assure 200% satisfaction. release milestones after you are completely satisfied.
£135 GBP in 2 days
4.6 (6 reviews)
3.3
3.3
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- previous experience in such topics; - eager to discuss a lot in this chat stream; - degree stats / maths;
£20 GBP in 1 day
5.0 (3 reviews)
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Power calculation This project is my strength and I can fulfill your requirements properly within your given deadline. I always give plagiarism-free work to my clients at very competitive prices. I have more than 5 years of writing experience, I have served more than 4000 clients on other forums including; Upwork, Fiverr and Guru. Please give me a chance to show you my writing abilities. I am waiting for you. :) https://www.freelancer.com/u/IdealExpert
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4.9 (3 reviews)
2.6
2.6
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MASTERS IN STATISTICS, EXPERT IN NAMED SKILLS, OVER 18 YEARS OF EXPERIENCE, DEAR EMPLOYER, After KEENLY reading your description and being in possession of all CLEARLY STATED REQUIRED SKILLS as this is my area of PROFESSIONAL SPECIALIZATION having the above QUALIFICATIONS, i hereby humbly request you to consider my bid for QUALITY and PROFESSIONAL work. THANK-YOU.
£250 GBP in 7 days
5.0 (3 reviews)
1.6
1.6
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MASTERS IN APPLIED STATISTICS HELLO DEAR CLIENT I have gone through your project details and the work is DOABLE since its within my area of EXPERTISE.I will tackle are required guideline to deliver desired goal Please consider my bid. THANKS
£135 GBP in 2 days
2.9 (6 reviews)
2.7
2.7

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