Asked 4th Dec, 2010

Search for tumor markers for cancer and neck?

I am looking for somebody, who is interesting in tumor markes cancer of head and neck.
Can you contact me?

All Answers (3)

9th Jun, 2018
Lia Schwartz
CUNY Graduate Center
content uploaded for Lia
21st Jan, 2019
Thomas Bach
Sensatech Research
I would be interested in using electric fields to identify if it was cancerous.

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What is the correct way to do Box-Tidwell test in SPSS for logistic regression?
2 answers
  • Nikki LeeflangNikki Leeflang
I am conducting a binary logistic regression and would like to test the assumption of linearity between the continuous independent variables and the logit transformation of the dependent variable in SPSS.
However, I was wondering whether the predictor*log interactions should be included when conducting the logistic regression analysis that tests my hypotheses. When the interactions of the continuous independent variables and their logs are included, the coefficients and significance (as observed in the SPSS output) is different compared to when only the predictors (and no interactions with logs) are included. See screenshots for the difference in regression output.
So basically I want to know whether I need to include the Box-Tidwell test interactions in my main model. Or do I need to first run a binary logistic regression to conduct the Box-Tidwell test, then see whether the assumption is met or not, then run a new binary logistic regression with only my predictors, and then use this output to report my results?
I hope my question is clear. If not, I'd be happy to clarify.

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