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Questions related from Bahar Ysr
Hello, I aim to compare the Length of Stay (LOS) in hours b/n two independent groups, with sample sizes of 300 and 310. The LOS data does not follow a normal distribution and shows right-skewed...
26 June 2024 1,762 7 View
Hi everyone, I was wondering how to get the correlation between one dependent variable and independent variable, Pearson correlation is not an option as there is a follow up visit for each...
25 June 2024 7,972 6 View
Hi everyone, we know that the analysis of pilot studies should be based on descriptive statistics and ideally not involve any inferential statistics (i.e., P values). Based on this can I use Roc...
25 June 2024 4,321 7 View
The Analyse for Pilot study should be based on the descriptive stat and ideally not involved inferential stat. what about exploratory study? can I do inferential stat like cox regression or...
18 June 2024 5,289 3 View
Hi everyone, I've created a p-chart to monitor a binary variable on a quarterly basis. But I noticed a p-chart requires at least 20 data points. So, I've shifted to monthly reporting. with this...
07 June 2024 4,756 0 View
Hi everyone, what assumption will be used if the assumption of one-way Anova are unmet? I think Kruskal Wallis-test, am I right? What about two-way Anova?
04 June 2024 2,130 3 View
I have two outcome variables: 1- binary 2- repeated measure There is only one independent variable which is time varying covariate Iam looking for the article to write the Stat for: 1-...
02 June 2024 9,764 3 View
Can I run Mixed-effect-logistic regression with only one single outcome variable which is time varying covariate?there is no confounder for the study. or should i have more than one independent...
01 June 2024 793 7 View
Hi everyone, t-test will be used to compare the outcome variable b/n two independent groups, my question is If I want to consider confounder what stat method is suitable? Thanks
01 June 2024 6,489 1 View
I have a time varying covariate as an independent variable and outcome variable is a continuous outcome measured at multiple time points, can I say LMM is the option to see how changes in the time...
25 May 2024 1,472 0 View
Hi everyone, I used Cochran’s formula to get the sample size estimation, which is 140, and reviewer asked me what Is The lowest sample size to achieve the study objectives? Could you please...
23 May 2024 3,071 4 View
Hi everyone, I want to compare the following outcome between two independent groups: anesthesia time time to surgical readiness surgical time, emergence time, and total operating room time...
08 May 2024 8,795 13 View
hi everyone, I have three objectives in the protocol. My first objective is to calculate the incidence of specific illness presentations to the emergency departments. Just to be sure if I have...
07 May 2024 2,129 2 View
Hi everyone, I want to Apply Tests for Special Causes in p-chart, but the sample size for each group is different. So I don’t have a fixed UCL and LCL, and I will get the following warning with...
06 May 2024 4,297 0 View
Hi everyone, I want to Apply Tests for Special Causes in p-chart, but the sample size for each group is different. So I don’t have a fixed UCL and LCL. Just a question can I apply Tests for...
06 May 2024 259 9 View
Hello everyone, I am calculating the duration from Site Selection to Clinical Start Date for the process map. The duration across all groups ranges from 0 to 70 months, with mean of 5.6 months...
04 May 2024 2,550 4 View
Hello everyone, I have research including two objectives, one of them is to assess the relationship using logistic regression. another one is comparing two groups using Mann-Whitney U...
21 April 2024 4,985 4 View
Hi everyone, I have data available for 4 years. To Compare weight-loss outcomes between the four medication groups for whole years, I will apply one-way ANOVA. but I will be asked to compare...
19 April 2024 324 3 View
Hi Everybody, I have a presentation regarding observational study, I have divided like: Descriptive Study: Analytical study case report/case series...
08 April 2024 5,170 4 View
Hi everyone, I would appreciate to guide me on this? I have the study design as a serial cross-sectional study with ten years of data, the goal is: to Identify changes in the workload of...
19 March 2024 1,720 4 View
I am wondering is it straightforward to run a competing risk analyze with time varying covariate in SAS or is it complex? is there any Resurce about that? Thanks
17 March 2024 1,800 0 View
Hi everyone, I have prospective study; the aim is to apply multiple logistic regression. The sample size for the current study is determined based on the previous study. A study designed to...
13 March 2024 2,306 5 View
I have the survey among three groups of health professionals to answer the survey. The survey is a Likert scale for seven different treatment options across different disease conditions (6...
11 March 2024 9,756 3 View
Hi everyone, I would appreciate to give me your thoughts/suggestions on my goal: I have a survey on below question, The question is How important do you think it is for residents to learn about...
01 March 2024 4,352 1 View
Hi everyone, I would appreciate to give your suggestion on this goal: To investigate the impact of anxiety disorder on school functioning and social interactions (two subscales of PedsQL). I...
29 February 2024 2,968 0 View
Hi everyone, I would appreciate to tell me you suggestion: I’m going to compare just two independent group. The outcome variables are continuous -one of them has 5 subclass and another one has 4...
29 February 2024 8,898 8 View
Hi everyone, I would appreciate if you could give me your suggestion/thought on this goal: My goal is to Identify the key variables that contribute to risk of surgical complications in specific...
01 January 1970 1,383 0 View
