Gamma frailty model applied to skin graft data

Independence Model   Estimate     S.E.       Wald    P-value
MTCH                 -1.03448  0.43960    5.53761    0.01861

                 Testing Null Hypothesis: Frailty=0
     Criterion No Frailty    Frailty Chi-Square    P-value
     -2 Log L    168.1611   165.8518     2.3093     0.1286

   Frailty Model   Estimate       S.E.       Wald     Pvalue
   Frailty          0.71477    0.62316    1.31562    0.25138
   MTCH            -1.30669    0.52815    6.12116    0.01336

   Gamma frailty model applied to tumor Recurrence

Independence Model   Estimate     S.E.       Wald    P-value
GP                   -0.21586  0.21419    1.01571    0.31354
TN1                  -0.92227  0.26893   11.76123    0.00060
TN2                  -0.63251  0.28636    4.87872    0.02719

Need to decrease initial value of theta called leftend in
macro

       Tobit model for arsenic in water
                       The REG Procedure
                         Model: MODEL1
                  Dependent Variable: lwater
                      Parameter Estimates

                   Parameter      Standard
Variable    DF      Estimate         Error   t Value   Pr > |t|
Intercept    1      -3.31033       0.72301     -4.58     0.0002
lnail        1       2.28100       0.42445      5.37     <.0001

                     The LIFEREG Procedure
                Analysis of Parameter Estimates
                            Standard   95% Confidence     Chi-
  Parameter     DF Estimate    Error       Limits       Square
  Intercept      1  -3.2435   0.8970  -5.0016  -1.4854   13.07
  lnail          1   2.6038   0.5470   1.5317   3.6759   22.66
  Scale          1   2.0709   0.4015   1.4161   3.0283

         Tobit model for Injuries from lifing
                       Lifereg  Procedure
Variable DF   Estimate  Std Err ChiSquare  Pr>Chi Label/Value
INTERCPT  1 -111.85927 30.59265  13.36933  0.0003 Intercept
ALR       1 14.5819742 8.748764  2.778045  0.0956
SCALE     1 59.0023869 12.22716                   Norm. scale

                   Ulcer recurrence data
       Incorrect answer ignoring interval censoring

                      The PHREG Procedure
            Analysis of Maximum Likelihood Estimates
               Parameter   Standard     Wald        Pr >
Variable  DF    Estimate     Error   Chi-Square  Chi-Square
TRT        1    0.188712    0.62736     0.09048      0.7636

                Ulcer recurrence data
    Correct answer accounting for interval censoring

                      The GENMOD Procedure      
              Analysis Of Parameter Estimates            
 Parameter     DF    Estimate   Std Err   ChiSquare  Pr>Chi
 INTERCEPT      1     -1.7942    0.5792      9.5969  0.0019
 TRT            1      0.1953    0.6279      0.0967  0.7558
 PERIOD     0   1     -0.4120    0.6066      0.4612  0.4971
 PERIOD     1   0      0.0000    0.0000           .       .
 SCALE          0      1.0000    0.0000           .       .