I am currently analyzing the impact of an intervention on medication numbers using difference-in-difference analysis, but I have encountered several challenges.   Following the SAS support instructions, I conducted the difference-in-difference analysis. However, I noticed a discrepancy between my results and SAS's example (Usage Note 61830: Estimating the difference in differences of means).   In the example, the value of 'Mean Estimate' in 'Contrast Estimate Results' is identical to the 'Estimate' in 'Least Squares Means Estimate'. However, in my case, these values were different. I suspect this could be due to my use of the negative binomial distribution with a log link, resulting in exponential values. Consequently, I am unsure whether to rely on the 'Mean Estimate' in 'Contrast Estimate Results' or the 'Estimate' in 'Least Squares Means Estimate', and how to interpret the results."   Contrast Estimate Results Label Mean Estimate Mean Confidence Limits L'Beta Estimate Standard Error diff in diff 1.51 1.49 0.41 0.0051   a*b Least Squares Means a b Estimate Standard Error z value Pr > |z| 1 1 0.77 0.00434 178.19 <.0001 1 0 0.03 0.00508 6.5 <.0001 0 1 0.72 0.00408 177.71 <.0001 0 0 0.40 0.00426 93.11 <.0001   Least Squares Means Estimate Effect Label Estimation Standard Error z value Pr > |z| time*hospitalize diff in diff 0.41 0.00509 81.01 <.0001 ... View more

Hi, tsmk is my time-dependent covariate, deathstatus_inhance is censor, and stime_inhance is time. The "Change step" worked well, but the "Count step" only worked for four observations and stopped. Please help me to correct my code.       DATA analysis.change; SET analysis.smk_stime2; ARRAY tsmk_(*) tsmk_1-tsmk_5; *call in the time-varying smoking variables; ARRAY chng(5); *the new indicator variables; t=1; *initialize the position variable for the indicator variables; DO i = 2 TO 5; IF tsmk_(i) NE tsmk_(i-1) THEN DO; *detects whether there is a change in smoking status; chng(t) = i-1; *assigns the last year the status remained constant; t=t+1; END; END; RUN; DATA analysis.count; SET analysis.change; ARRAY tsmk_(*) tsmk_1-tsmk_5; /* call in the time-varying smoking variables */ ARRAY chng(*) chng1-chng5; /* call in the indicator variables */ start = 0; /* initialize the beginning time for the study */ censor2 = 0; /* initialize the new censor variable */ t = 1; /* initialize the position variable for the indicator variables (chng1-chng5) */ DO i=1 TO stime_inhance; /* makes sure we only output the records that smoking status remains constant */ IF (chng(t) > . and chng(t) < stime_inhance) or i = stime_inhance THEN do; /* assign the value of smoking status */ IF chng(t) > . THEN smoking_status = tsmk_(chng(t)); ELSE smoking_status = tsmk_(stime_inhance); /* assign the end time */ stop = min(chng(t), stime_inhance); /* assign the value of the censor variable */ IF i = stime_inhance THEN censor2 = deathstatus_inhance; /* assign the new start time */ IF t > 1 THEN start = chng(t-1); /* move the position variable */ t = t + 1; OUTPUT; /* output the record to the new dataset */ end; END; RUN; ... View more

I need to combine same clinic names if the corresponding prior_span =1. For example, if Clinic_name1 and Clinic_name2 where both Clinic A and Prior_span1 and prior_span2 both =1 then Clinic would = A. Clinic_name_1 corresponds with Prior_span1 Clinic_name_2 corresponds with Prior_span2 Clinic_name_3 corresponds with Prior_span3   Below is my sample data.    Thanks! Data Have; input ID$ Clinic_Name_1$ Clinic_Name_2$ Clinic_Name_3$ Prior_Span1$ Prior_Span2$ Prior_Span3$ Cost service$ ; datalines; 1 B A . 0 0 0 168 A 2 A A . 1 0 0 46 B 2 A A . 0 1 0 99 C 3 B . . 0 0 0 24 D 4 D . . 0 0 0 54 A 5 B D F 0 1 0 405 B 7 A . . 1 0 0 90 F 8 E E A 0 0 1 87 J 9 F . . 0 0 0 0 G 10 C C C 0 0 0 40 C 10 C C C 0 0 1 374 B 10 C C C 0 1 1 60 A ; run; ***Summary table-clinic var not created yet****; proc sql; create table want as select 1 as ID1,'service' as a length=40,Clinic, 1 as ID2,put(service, $40.) as b length=40, 1 as ID3,(select count(distinct ID) from have where Clinic=a.Clinic and service=a.service and cost>0 ) as c format=comma20., 1 as ID4,calculated c/(select count(distinct ID) from have where Clinic=a.Clinic and cost>0 ) as d format=percent8.1, 1 as ID5,sum(cost) as e format=dollar20., 1 as ID6,sum(cost)/(select sum(cost) from have where Clinic=a.Clinic) as f format=percent8.1 from have as a group by Clinic,service union all select 7 as id1,'09'x as a,Clinic, 7 as id2,'Total Clients' as b, 7 as id3,count(distinct ID) as f, 7 as id4,., 7 as id5,., 7 as id7,. from have where service ne 'j' and cost>0 group by Clinic union all select 7 as id1,'09'x as a,Clinic, 7 as id2,' Total Cost' as f, 7 as id3,. as c, 7 as id4,., 7 as id5,sum(cost), 7 as id7,. from have where service ne 'j' and cost>0 group by Clinic ;quit; options missing=' '; proc report data=want nowd; column id1 a b Clinic,(c d e f); define id1/group noprint; define a/group noprint ' '; define b/group ' '; define c/analysis 'Clients'; define d/analysis '% of Clients'; define e/analysis 'Cost'; define f/analysis '% of Cost'; define Clinic/across ''; compute before a/style={just=l color=black}; if id1=1 then len=0; else len=10; x=' '; line x $varying10. len; line a $40.; endcomp; run;   ... View more

I am configuring Oracle on new 9.4 M8 and below are the entries I made in sasenv_local after having Oracle configured on Linux. everything looks good as per SAS documentation but still getting the error. Can you please suggest where things are going wrong?   Note : I have restarted Connect and Share services after updating sasenv_lcoal.    libname mydblib oracle user=uname password=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX  ! path=<mypath from tnsnames.ora>; ERROR: Unable to load oracle client (libclntsh.so) ERROR: Error in the LIBNAME statement.   sasenv_local entries:   ODBCHOME=/sas/sashome/AccessClients/9.4/SQLServer export ODBCHOME ORACLE_HOME=/sas/oracle/product/12.2.0/dbhome_1 export ORACLE_BASE=/sas/oracle export PATH=$ORACLE_HOME/lib:$PATH LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH export LD_LIBRARY_PATH   echo $PATH /sas/sashome/SASFoundation/9.4:/sas/oracle/product/12.2.0/dbhome_1/lib:/sas/sashome/SASFoundation/9.4:/sas/oracle/product/12.2.0/dbhome_1/bin:/home/sas/.local/bin:/home/sas/bin:/usr/share/centrifydc/bin:/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sas/config/Lev1/Applications/SASGridManagerClientUtility/9.4/   echo $LD_LIBRARY_PATH /sas/sashome/AccessClients/9.4/SQLServer/lib:/sas/oracle/product/12.2.0/dbhome_1/lib ... View more