有一个tstat选项吧

outreg [varlist] using filename [,
         
         (Text-related options)
         nolabel title(textlist) ctitle(textlist)
         nonotes addnote(textlist)
         
         (Coefficient options)
         bdec(numlist) bfmt(textlist) coefastr
         
         (Options for t statistics, standard errors, etc.)
         {se | pvalue | ci | beta} level(#) tdec(#) noparen
         bracket {noaster | 3aster | 10pct} sigsymb(textlist)
         
         (Statistics options)
         nocons nonobs noni nor2 adjr2 rdec(#)
         addstat("text", # [," text", # ...]) adec(numlist)
         eform margin[({u|c|p})] onecol xstats

         (Other options)
         comma replace append]

se specifies that standard errors rather than t statistics are reported. The
    decimal places displayed are those set by bdec.

pvalue specifies that p values (of t statistics) rather than t statistics
    are reported.  The decimal places displayed are set by tdec.

ci specifies that confidence intervals of coefficients rather than
    t statistics are reported.  The decimal places displayed are those set by
    bdec.
   
level(#) specifies the confidence level, in percent, for confidence
    intervals.  The default is level(95) or as set by set level; see ^[U] 23.5
    Specifying the width of confidence intervalslevel^ does not affect the
    confidence levels of asterisks.

beta asks that normalized beta coefficients be reported rather than
    t statistics (see the beta option of regress).  The decimal places
    displayed are those set by bdec.
   
tdec(#) specifies the number of decimal places reported for t statistics
    or for p values if pvalue is specified. It also specifies the decimal
    places reported for R-squared or adjusted R-squared if they are not
    specified in rdec.  The default value for tdec is usually 2, but 3
    if pvalue is specified. The minimum value is 0 and the maximum value
    is 11.

option为se即可

outreg2 [a1 a2 using aa.doc ,tstat