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Discrepancies in Estimated Cox PH Coe... |
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Hi, I am exploring the role of neighborhood characteristics and individual observed and latent factors on 5-year survival among persons living with AIDS. Mplus seems to be ideal for this. I ran a very simple Cox proportional hazard model on (0,1) dummy variables of race/ethnicity i.e. MODEL: aids ON blk lat asn), and the Mplus estimates are very different from those I obtain using the cox approach in R (and are not in line with the K-P plots). *The R PH output is as follows: race coef exp(coef) se z p blk 0.292 1.339 0.107 2.72 0.0066 lat -0.241 0.786 0.142 -1.70 0.0890 asn -0.310 0.734 0.249 -1.24 0.2100 **By contrast, the Mplus estimates are: race Est SE Est/SE BLK 0.008 0.010 0.808 LAT 0.005 0.010 0.520 ASN 0.052 0.025 2.098 Can you please help me understand why I am returning such different results? Thanks, Michael |
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If you are following Example 6.21, you should get the same results. You may have something specified incorrectly. Please send your input, data, output, and license number to support@statmodel.com. Please also send the R input and ouptut. |
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