st: cendif

[alfonsa leiva <arfons74@yahoo.com>]

Dear stata user

In the between group analisis (control vs Intervention1/ control vs Intervention2/Intervention1 vs Intervention2)of a three arm cluster trial,

 I can get p- values by somersd:

xi, noomit: somersd   T6convulsion i.grupo, taua transf(z) tdist cluster(medcod3)

testparm _I*


. testparm _I*

 ( 1)  _Igrupo_1 = 0
 ( 2)  _Igrupo_2 = 0
       Constraint 2 dropped

       F(  1,    46) =    7.02
            Prob > F =    0.0110



Could i use also Hodges-lehman estimates by cendiff to report differences between groups?  


xi,noomit: cendif   T6irritabilidad , transf(z) tdist cluster(medcod3) by(grupo)


 Percent    Pctl_Dif     Minimum     Maximum 
        50           0           0           0 


I apreciatte any comment



Thanks
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