I'm trying to a multivariable logistic regression analysis of some data, with one of the variables being 'period'
Code:
* Example generated by -dataex-. For more info, type help dataex clear input float period 1 1 1 1 1 1 1 1 6 2 6 3 6 6 3 1 1 1 1 1 1 2 6 1 2 3 6 4 1 5 1 1 1 1 1 1 1 1 3 7 6 7 7 6 5 1 1 6 6 1 1 2 6 1 6 1 4 3 6 3 3 7 1 6 6 4 2 1 3 6 3 1 1 1 6 3 2 7 1 7 6 3 7 6 2 6 6 1 6 6 6 3 7 6 1 6 3 6 6 6 end label values period periodla label def periodla 1 "1", modify label def periodla 2 "2", modify label def periodla 3 "3", modify label def periodla 4 "4", modify label def periodla 5 "5", modify label def periodla 6 "6", modify label def periodla 7 "7", modify
Whenever I do the regression like so
Code:
logit trans b1.period, or
Code:
Iteration 0: log likelihood = -23971.55 Iteration 1: log likelihood = -23918.449 Iteration 2: log likelihood = -23918.271 Iteration 3: log likelihood = -23918.271 Logistic regression Number of obs = 55,847 LR chi2(5) = 106.56 Prob > chi2 = 0.0000 Log likelihood = -23918.271 Pseudo R2 = 0.0022 -------------------------------------------------------------------------------- trans | Odds ratio Std. err. z P>|z| [95% conf. interval] ---------------+---------------------------------------------------------------- period | 2 | .7467871 .0439266 -4.96 0.000 .6654699 .8380408 3 | .8045088 .0275544 -6.35 0.000 .7522759 .8603684 4 | .7566667 .0595155 -3.55 0.000 .648565 .8827867 5 | .854655 .05772 -2.33 0.020 .7486935 .975613 6 | .7256962 .0332995 -6.99 0.000 .6632792 .7939867 | _cons | .1974665 .0027929 -114.69 0.000 .1920677 .2030171
I put b1.period and get all of the other period categories (2,3,4,5,6) in my output table, APART from the final one , which is 7.
Any Ideas why 7 is not coming up on the regression output?
0 Response to Multivariable logistic regression missing out categories
Post a Comment