Introduction¶
Below are some other parameters available for PRSice
Command¶

allscore
Output PRS for ALL threshold. !!! warning This will generate a huge file 
exclude
File contains SNPs to be excluded from the analysis. Mutually exclusive from
extract

extract
File contains SNPs to be included in the analysis. Mutually exclusive from
exclude

ignorefid
Ignore FID for all input. When this is set, first column of all file will be assume to be IID instead of FID

logitperm
When performing permutation, still use logistic regression instead of linear regression. This will substantially slow down PRSice.
Note
One problem with using
logitperm
is that some of the permuted phenotype might be suffer from perfect separation. This leads to the GLM logistic model not being able to be converge (thus terminating PRSice).If you encounter such problem, you might want to exclude the
logitperm
option. In most case, the pvalue of the linear model should be similar to the logistic model 
keepambig
Keep ambiguous SNPs. Only use this option if you are certain that the base and target has the same A1 and A2 alleles

out
o
Prefix for all file output.
Note
If multiple target phenotypes are included (e.g. using
phenocol
), the phenotype will be appended to the output prefixIf multiple gene set are included, the name of the set will be appended to the output prefix (after the phenotype (if any))

perm
Number of permutation to perform. This will generate the empirical pvalue. Recommend to use value larger than 10,000
Note
Essentially, when permutation is required, PRSice will perform the following operation (with slight difference in implementation for optimum performance)
 Perform normal PRSice across all thresholds and obtain pvalue of the most significant threshold
 Repeat PRSice analysis N times with permuted phenotype. Count the number of time where the pvalue of the most significant threshold for the permuted

seed
s
Seed used for permutation. If not provided, system time will be used as seed. This will allow the same results to be generated when the same seed and input is used

printsnp
Print all SNPs used to construct the best PRS

thread
n
Number of thread use
Tip
You can ask for maximum number of thread by using
thread max
Note
Multithreading will actually be slower if you require more thread than what is available. To avoid this, PRSice will limit the maximum number of thread used to the number of core available on the system as detected by PRSice.

help
h
Display the help messages