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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). …
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. …
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 …
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. …
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 …
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. …
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 <- …
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. …
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). …
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. …
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. …
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( …
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 …
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 …
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. …