17 Questions 14 Answers 0 Followers
Questions related from Essam A. Al-Moraissi
Can we calculate the standard deviation IF the mean, sample size and P value are given ?
07 July 2018 8,390 1 View
To assess certainty of confidence in results of meta analysis, GRADE system used certain domains such as risk of bias, imprecision , indirectness and publication bias . However for those meta...
03 March 2018 10,284 0 View
To assess the relationship between risk factors and outcomes, we have to do an assessment , there are several scales or tools. what is the best and most flexible tool can be use for this purpose?
10 October 2017 844 4 View
To identify association between 2 variable ,( to assess if one factor cause another factor) Statistically, how can measure this relation?
08 August 2017 6,864 1 View
To test an association between 2 quantitative variables , either computing correlations or regression,thus At what case we should use regression and avoid correlation. In other words, what is...
05 May 2017 5,136 21 View
There are a different metrics to assess the importance and significance of scientific journals as Impact factor, h-index, Eigenfactor ,SCImago Journal Rank or SNIP ..etc. What is the current and...
04 April 2016 1,930 0 View
Once there were no significant differences and p value greater than 0.05 Does this mean the null hypothesis is accepted ?
02 February 2016 9,327 7 View
About, 40% of KOTs presented with inflammations. in this cases, aspiration and incisional biopsies would not give a reliable results. Its assume that the clinician should know a definitive...
01 January 2016 4,700 3 View
Usually, We read this terms ;sensitivity, specificity, accuracy in literature to describing a diagnostic methods , I am confusing to imagine a meaning of this three terms. I need an example, how...
01 January 2016 5,127 1 View
Once there are an variables that could effect the results of meta analysis as follow up periods( variations). How can interpreted results of meta regression or do moderator analysis to identify...
01 January 2016 5,818 1 View
In linear regression , I have been performing to identify the relation between risk ratio for outcome of tumors relapse and duration of follow up in months. The results were : Slope :-0.00015. P...
01 January 2016 4,947 7 View
In meta analysis , When a P value is 0.000, is this mean its significant or not.
11 November 2015 2,820 1 View
Are there an specific indications to calculate an weighted variable(mean or rate?
11 November 2015 6,811 0 View
which one is more accurate to represent an variable of populations? How to calculate an unweighted variables?
11 November 2015 977 2 View
Traditionally, the meta analysis perform between two groups (predictor variable) to identify which group or technique has better or worse than another but sometimes we need to assess an...
10 October 2015 7,603 2 View
After performing meta analysis for case series by using event rate or proportion, the overall result of all studies was 0.242, How could we present/interpenetration this result in my paper?
10 October 2015 8,324 0 View
At which conditions, risk difference is better to be used than risk or odds ratio or others effect measures?
01 January 1970 3,618 2 View
