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From |
"Steichen, Thomas" <STEICHT@RJRT.com> |

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

Subject |
st: RE: difficulty using META command and exporting output in Stata |

Date |
Wed, 16 Oct 2002 15:26:46 -0400 |

John Hopkins writes (in part): > I am working on a meta analysis of studies looking at the > risk of cancer in asthma patients. We are using the META > command to generate our summary estimates (we have adjusted > odds ratios, with standard errors). I am trying to take > pooled estimate and confidence limits out of the table as > variables, without manually typing them in. > > Here is what I typed into stata to generate the output > tables: meta loggeneff seloggeneff, eform graph(f) cline > xline(1) xlab(.1,1,10) > id(studygen) b2title(gender-specific estimates) print > > Here are the output tables: > > Meta-analysis (exponential form) > > | Pooled 95% CI Asymptotic No. of > Method | Est Lower Upper z_value p_value studies > -------+---------------------------------------------------- > Fixed | 1.068 1.038 1.099 4.489 0.000 2 > Random | 1.073 0.989 1.165 1.689 0.091 > > Test for heterogeneity: Q= 8.025 on 1 degrees of freedom (p= > 0.005) Moment-based estimate of between studies variance = 0.003 > > | Weights Study 95% CI > Study | Fixed Random Est Lower Upper > -------------------+---------------------------------------- > Vesterinen Males | 2013.93 280.27 1.12 1.07 1.17 > Vesterinen Females | 2646.46 289.91 1.03 0.99 1.07 > > > How can I save the summary estimate and confidence limits > from the analysis (random effects) to variables? I need to > take these values and do some data management and additional > analysis with them, and I do not want to hand-enter every > estimate generated from the command. The help file for -meta- indicates that it saves the following results (copied directly from the help file): Saved values ------------ S_1 Theta (fixed) S_2 SE Theta (fixed) S_3 Lower CI Limit (fixed) S_4 Upper CI Limit (fixed) S_5 Asymptotic Z-value (fixed) S_6 Asymptotic p-value (fixed) S_7 Theta (random) S_8 SE Theta (random) S_9 Lower CI Limit (random) S_10 Upper CI Limit (random) S_11 Asymptotic Z-value (random) S_12 Asymptotic p-value (random) S_13 Between-studies Variance, tau^2 So, what you want is S_7, S_9 and S_10 and these are saved as global macros. You can paste these values into variables just like any other global values, for example: gen est=. gen ll=. gen ul=. meta... replace est = $S_7 in 1 replace ll = $S_9 in 1 replace ul = $S_10 in 1 It is the $ that tell Stata to use a global. Tom

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**Follow-Ups**:**st: RE: difficulty using META command and exporting output in Stata***From:*Roger Harbord <Roger.Harbord@bristol.ac.uk>

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