Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options not deleted user 107799

Use this tag for any *on-topic* question that (a) involves `R` either as a critical part of the question or expected answer, & (b) is not *just* about how to use `R`.

12 votes
1 answer
2k views

Which is the best method for network meta-analysis?

Jackson et al); hierarchical arm-based Bayesian modeling in WinBUGS (eg Zhao et al); hierarchical contrast-based (i.e. node-splitting) Bayesian modeling, either with WinBUGS or through gemtc and rjags in R … (eg White et al); network meta-analysis with lme and netmeta in R (eg Lumley, which is however limited to two-arm trials, or Rucker et al). …
Giuseppe Biondi-Zoccai's user avatar
6 votes
1 answer
4k views

Which is the best graph to describe a survival analysis with a time-dependent covariate?

My packages of choice would be R or Stata. References Dafni U. Landmark analysis at the 25-year landmark point. Circulation: Cardiovascular Quality and Outcomes 2011;4:363-71. Ying Z, Wei LJ. … Simon R, Makuch RW. A non-parametric graphical representation of the relationship between survival and the occurrence of an event: Application to responder versus non-responder bias. …
Giuseppe Biondi-Zoccai's user avatar
6 votes

Odds ratio meta analysis with no control group

Once you have for each study the point estimate and the standard error, it is easy to combine them with a statistical package (eg metan in Stata, meta or metafor in R). … Note indeed that the R meta package offers the metaprop command which will directly suit you, as clarified by this illustrative code: library(meta) studyid <- c(1:10) events <- sample(5:20, 10, replace …
Giuseppe Biondi-Zoccai's user avatar
5 votes
2 answers
1k views

Which is the best method for meta-analysis of diagnostic test accuracy studies?

R; frequentist bivariate model using metamisc in R; frequentist bivariate model using metandi in Stata; frequentist copula mixed model using CopulaREMADA in R; frequentist hierarchical summary receiver … in R. …
Giuseppe Biondi-Zoccai's user avatar
5 votes

multiple imputation and propensity scores

As I previously stated, instead of doing propensity matching it can be reasonable to use inverse probability of treatment weighting after missing data imputation. Suitable Stata examples follow: cle …
Giuseppe Biondi-Zoccai's user avatar
5 votes
2 answers
8k views

Comparing two or more treatments with inverse probablity of treatment weighting

My preference would be to conduct the analysis first using 1:1 propensity score matching, for instance using twang or MatchIt in R, or psmatch2 in Stata. … Then, confirm the main analysis without excluding any case by means of inverse probability of treatment weighting, for instance using twang in R, or meglm in Stata. …
Giuseppe Biondi-Zoccai's user avatar
4 votes
1 answer
981 views

Using limited independent variables in a multivariable regression model

In particular, I am giving below an example of the dataset and the possible analysis in R (disregard the overfitting, it's just to make an example, my actual dataset has at least 10,000 cases): dep <- …
Giuseppe Biondi-Zoccai's user avatar
4 votes

Propensity Score Matching for more than 2 groups

There are already some overlapping Q&A in CV that you might wish to look at: Propensity Score Matching in R with Multiple Treatments Software that matches 6 groups by propensity score? … Comparing two or more treatments with inverse probablity of treatment weighting My advice would be to use the twang R package. …
Giuseppe Biondi-Zoccai's user avatar
3 votes
2 answers
3k views

Statistical analysis of relational database: is it possible and how?

I have been struggling with flat file databases and corresponding statistical packages for almost 20 years now (from Excel to SPSS, then Stata, and currently R). …
Giuseppe Biondi-Zoccai's user avatar
3 votes
1 answer
798 views

Confidence interval of AUC with Reitsma model in mada R package

I am conducting a meta-analysis of diagnostic test accuracy studies comparing myocardial perfusion scintigraphy vs coronary angiography using the mada R package. …
Giuseppe Biondi-Zoccai's user avatar
3 votes
2 answers
92 views

Appraise inconsistency (e.g. I-squared) in individual patient data meta-analysis

I am working on an individual patient data meta-analysis, using a Cox proportional hazard model, with and without taking into account study identification, in Stata and R. …
Giuseppe Biondi-Zoccai's user avatar
2 votes

How to calculate mean and standard deviation from median and quartiles

There is a detailed publication on this topic from Greco et al, How to impute study-specific standard deviations in meta-analyses of skewed continuous endpoints? World Journal of Meta-Analysis 2015;3( …
Giuseppe Biondi-Zoccai's user avatar
2 votes

Diagnostic Meta-Regression with mada in R

I think your point is correct, in the sense that nominal significance is met (p=0.023) for the false positive rate (FPR), which appears positively associated with self-administered questionnaires (SAQ …
Giuseppe Biondi-Zoccai's user avatar
1 vote

Diagnostic accuracy meta-analysis using MADA in R

You can indeed use the mada R package, by means of the madauni command for univariate meta-analysis and the SummaryPts command for bivariate meta-analysis (the latter being recommended for instance by …
Giuseppe Biondi-Zoccai's user avatar
1 vote
0 answers
222 views

Is survey analysis in Stata or R equivalent to a fixed effect generalized linear model?

I am conducting an individual patient level data meta-analysis using the survey package in R (I tried Stata 13 but I get stuck with an error). … As per meta-analytic practice, I would prefer to conduct both fixed and random effect analyses, but it appears no such option is available with the survey packages in either Stata or R. …
Giuseppe Biondi-Zoccai's user avatar

15 30 50 per page