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From |
Nick Cox <n.j.cox@durham.ac.uk> |

To |
"'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: stored p-value of sts test |

Date |
Fri, 20 Jan 2012 18:33:09 +0000 |

You'll have to work out the P-value from the other r-class results to do this. Look up the chi-squared functions under -help density functions-. By the way, there seems some confusion here. -sts- does accept -if- qualifiers (not statements), which select observations to be used. But you want to see a graph conditional on whether the result is significant. That's a completely different -if-, the -if- command. People often confuse -if- and -if-; if so, it is not surprising. FAQ . . . . . . . . . . . . . . . . . . . . . if command vs. if qualifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J. Wernow 6/00 I have an if or while command in my program that only seems to evaluate the first observation, what's going on? http://www.stata.com/support/faqs/lang/ifqualifier.html Schematically you want sts test `x', logrank <calculate P-value> if <P-value> < 0.05 { sts graph, by(`x') tmax(60) graph save `x', replace } (Consider sprinkled here mild disquiet and strong cautions about using significance tests in this way from the ghost of R.A. Fisher, an early Hogwarts student.) Nick n.j.cox@durham.ac.uk Steve Nakoneshny I am performing some exploratory analyses in an stsetted dataset using Stata 11.2 for Mac. As part of a loop, I coded the following: -- start code -- sts test `x', logrank sts graph, by(`x') tmax(60) graph save `x', replace -- end code -- My local `x' comprises 18 variables, so the loop generates more graphs than I actually want to save. Looking at the help, I see that -sts graph- accepts -if- statements. What I would like to do is only graph (and save) where -sts test- is statistically significant (p<0.05). According to -help-, -sts test- doesn't save the p-value in r(). What I would like to know is whether or not the p-value is stored somewhere else (if at all) or if there is an alternate workaround I can implement. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: RE: stored p-value of sts test***From:*Steve Nakoneshny <scnakone@ucalgary.ca>

**References**:**st: stored p-value of sts test***From:*Steve Nakoneshny <scnakone@ucalgary.ca>

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