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Missing data: mediation with count ou...
Missing Data Modeling
posted on Wednesday, April 12, 2017 - 6:36 pm
I am using a mediation model to examine indirect effects. I have a continuous IV, 4 continuous mediators, 1 categorical mediator & a count outcome variable. My input is as follows:
M1 on x1 (a1);
m2 on x1 (a2);
m3 on x1 (a3);
m4 on x1 (a4);
m5 on x1 (a5);
y1 on M1 (b1);
y1 on m2 (b2);
y1 on m3 (b3);
y1 on m4 (b4);
y1 on m5 (b5);
y1 on x1 (c);
new (med1 med2 med3 med4 med5 med_total total);
med1 = a1*b1;
med2 = a1*b2;
med3 = a1*b3;
med4 = a1*b4;
med5 = a1*b5;
med_total = med1+med2+med3+med4+med5;
total = c + (a1*b1) + (a2*b2) + (a3*b3) + (a4*b4) + (a5*b5);
output: samp standardized tech1 CINTERVAL(BOOTSTRAP);
However, I get the following warning:
Data set contains cases with missing on x-variables.
These cases were not included in the analysis.
Number of cases with missing on x-variables: 17
1 WARNING(S) FOUND IN THE INPUT INSTRUCTIONS
How do I see the output? Do I need to modify my code?
Bengt O. Muthen
posted on Thursday, April 13, 2017 - 4:17 pm
This question is with Mplus Support.
Note also that mediation with a count outcome requires different indirect effects than a*b (see our new book).
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