Pairwise deletion and number of valid... PreviousNext
Mplus Discussion > Missing Data Modeling >
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 cindy chan posted on Thursday, April 17, 2008 - 10:32 pm
1/ i am doing path analysis model. i have some missing values in my dataset and want to use pairwise deletion so that i can have more cases in the analysis. what should i do for that?

2/ after running the analysis with pairwise deletion, is there a way to know (output) the number of valid cases used in the analysis between any two variables (e.g., x1 and y).
 Linda K. Muthen posted on Friday, April 18, 2008 - 8:49 am
I assume that your outcomes are categorical. With categorical outcomes, missing data. and a model without covariates, pairwise present data are analyzed. You can deduce the number of observations used by looking at the covariance coverage output and the missing data patterns that are printed with the PATTERNS option of the OUTPUT command.
 cindy chan posted on Friday, April 18, 2008 - 10:39 am
thank you.
 Eric Teman posted on Sunday, June 19, 2011 - 3:34 pm
How do you specify pairwise deletion in Mplus?
 Linda K. Muthen posted on Sunday, June 19, 2011 - 7:55 pm
There is no command for this.
 Patchara Popaitoon posted on Monday, September 19, 2011 - 4:20 am
Dear Linda,

I am not sure what this means 'The default is to estimate the model under missing data theory using all available data. To turn on listwise deletion, specify..' (Mplus manual, p.459-60). Does this suggest that all available data are included in the model and path analysis? If I have, say 80 missing values for one variable and 130 for another, how does the system deal with this inconsistent number of missing data for each variable? Does the system use pairwise deletion as a defualt to analyze the path coefficients?
Thanks.
pat
 Linda K. Muthen posted on Monday, September 19, 2011 - 12:35 pm
See the Topic 4 course handout and video where missing data where estimation iwth missing data is discussed.
 Stafanie Chris posted on Monday, March 17, 2014 - 7:12 am
Dear Muthen,

I am doing a correlation analysis in mplus. According to my data, I decided to use TYPE=COMPLEX and Pairwise deletion, but I didn't find any option to specify pairwise deletion, does this mean it is not provided in mplus?

Thanks!

Stafanie
 Linda K. Muthen posted on Monday, March 17, 2014 - 9:44 am
There is an option for listwise deletion. Add LISTWISE = ON to the DATA command. There is not option for pairwise present.
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