stci.hlp

是一个经济学管理应用软件 很难找的 但是经济学学生又必须用到

{smcl}
{* 01apr2005}{...}
{cmd:help stci} {right:dialog:  {bf:{dialog stci}}}
{hline}

{title:Title}

{p2colset 5 18 20 2}{...}
{p2col :{hi:[ST] stci} {hline 2}}Confidence intervals for means and percentiles of survival time{p_end}


{title:Syntax}

{p 8 13 2}
{cmd:stci} {ifin} [{cmd:,} {it:options}]

{synoptset 16 tabbed}{...}
{synopthdr}
{synoptline}
{syntab:Main}
{synopt :{opth by(varlist)}}report separate summaries by grouping variables{p_end}
{synopt :{opt m:edian}}calculate median survival times; the default{p_end}
{synopt :{opt r:mean}}calculate mean survival time restricted to longest follow-up time{p_end}
{synopt :{opt e:mean}}calculate the mean survival time by exponentially extending the survival time to zero{p_end}
{synopt :{opt p(#)}}compute the {it:#} percentile of survival times{p_end}
{synopt :{opt cc:orr}}calculate the standard error for {opt rmean} using a continuity correction{p_end}
{synopt :{opt l:evel}}set confidence level; default is {cmd:level(95)}{p_end}
{synopt :{opt nosh:ow}}do not show st setting information{p_end}
{synopt :{opt dd(#)}}set maximum number of decimal digits to report{p_end}
{synopt :{opt g:raph}}plot exponentially extended survivor function{p_end}
{synopt :{opt t:max(#)}}set maximum analysis time of {it:#} to be plotted{p_end}

{syntab:Plot}
{synopt :{it:{help cline_options}}}affect rendition of the plotted lines{p_end}

{syntab:Add plot}
{synopt :{opth "addplot(addplot_option:plot)"}}add other plots to the generated graph{p_end}

{syntab:Y-Axis, X-Axis, Title, Caption, Legend, Overall}
{synopt :{it:{help twoway_options}}}any options other than {opt by()} documented in {bind:{bf:[G] {it:twoway_options}}}{p_end}
{synoptline}
{p2colreset}{...}
{p 4 6 2}
You must {cmd:stset} your data before using {cmd:stci}; see {helpb stset}.{p_end}
{p 4 6 2}
{opt by} may be used with {cmd:stci}; see {helpb by}.


{title:Description}

{pstd}
{cmd:stci} computes means and percentiles of survival time, standard
errors, and confidence intervals.  In the case of multiple-event data,
survival time is the time until a failure.

{pstd}
{cmd:stci} can be used with single- or multiple-record or single- or 
multiple-failure st data.


{title:Options}

{dlgtab:Main}

{phang}
{opth by(varlist)} requests separate summaries for each group, along with an 
overall total.  Observations are in the same group if they have equal values 
of the variables in {it:varlist}.  {it:varlist} may contain any number of 
variables, each of which may be string or numeric.

{phang}
{opt median} specifies median survival times.  This is the default.

{phang}
{opt rmean} and {opt emean} specify mean survival times.  If the
longest follow-up time is censored, {opt emean} (extended mean) computes the
mean survival by exponentially extending the survival curve to zero, and
{opt rmean} (restricted mean) computes the mean survival time restricted to
the longest follow-up time.  Note that if the longest follow-up time is a
failure, the restricted mean survival time and the extended mean survival time
are equal.

{phang}
{opt p(#)} specifies the percentile of survival time to be computed.  For 
example {cmd:p(25)} will compute the 25th percentile of survival times, and 
{cmd:p(75)} will compute the 75th percentile of survival times.  Note that 
specifying {cmd:p(50)} is the same as specifying the {opt median} option.

{phang}
{opt ccorr} specifies that the standard error for the restricted mean
survival time be computed using a continuity correction.  {opt ccorr} is only
valid with option {opt rmean}.

{phang}
{opt level(#)} specifies the confidence level, as a percentage, 
for confidence intervals.  The default is {cmd:level(95) or as set by 
{cmd:set level}; see {help level}.

{phang}
{opt noshow} prevents {cmd:stci} from showing the key st variables.  This 
option is seldom used since most people type {cmd:stset, show} or 
{cmd:stset, noshow} to et whether they want to see these variables mentioned 
at the top of the output of every st command; see {helpb stset}.

{phang}
{opt dd(#)} specifies the maximum number of decimal digits to be reported for 
standard errors and confidence intervals.  This option affects only how values 
are reported and not how they are calculated.

{phang}
{opt graph} specifies that the exponentially extended survivor function
be plotted.  This option is only valid when option {opt emean} is also
specified and is not valid in conjunction with the {opt by()} option.

{phang}
{opt tmax(#)} is for use with the {opt graph} option.  It specifies the 
maximum analysis time to be plotted.

{dlgtab:Plot}

{phang}
{it:cline_options} affect the rendition of the plotted lines; see {it:{help cline_options}}.

{dlgtab:Add plot}

{phang}
{opt addplot(plot)} provides a way to add other plots to the 
generated graph.  See {it:{help addplot_option}}.

{dlgtab:Y-Axis, X-Axis, Title, Caption, Legend, Overall}

{phang}
{it:twoway_options} are any of the options documented in 
{it:{help twoway_options}} excluding {opt by()}.  These include options for 
titling the graph (see {it:{help title_options}}) and options for saving the 
graph to disk (see {it:{help saving_option}}).


{title:Examples}

    {cmd:. stci}
    {cmd:. stci, rmean}
    {cmd:. stci, emean}
    {cmd:. stci, p(25)}
    {cmd:. stci, by(drug)}
    {cmd:. stci, by(drug size) rmean}
    {cmd:. stci, by(drug) p(80)}
    {cmd:. stci, emean graph}


{title:Also see}

{psee}
Manual:  {bf:[ST] stci}

{psee}
Online:  {help st}, {helpb stdes}, {helpb stgen},
{helpb stir}, {helpb sts}, {helpb stset}, {helpb stvary}
{p_end}