Results: senicreg1.sas

Study of the Effectiveness of Nosocomial Infection Control

Multiple Regression One

Check new variable mschool

The FREQ Procedure

The FREQ Procedure

Table mschool * medschl

Cross-Tabular Freq Table

Frequency
Table of mschool by medschl
mschool medschl(Medical school affiliation)
  N Y Total
.
4
0
0
4
0
0
93
0
93
1
0
0
16
16
Total
4
93
16
113

Study of the Effectiveness of Nosocomial Infection Control

Multiple Regression One

Without xratio and culratio

The REG Procedure

Model: MODEL1

Dependent Variable: infrisk Prob of acquiring infection in hospital

The REG Procedure

MODEL1

Fit

infrisk

Number of Observations

Number of Observations Read 113
Number of Observations Used 102
Number of Observations with Missing Values 11

Analysis of Variance

Analysis of Variance
Source DF Sum of
Squares		 Mean
Square		 F Value Pr > F
Model 10 75.63595 7.56360 6.33 <.0001
Error 91 108.74493 1.19500    
Corrected Total 101 184.38088      

Fit Statistics

Root MSE 1.09316 R-Square 0.4102
Dependent Mean 4.36176 Adj R-Sq 0.3454
Coeff Var 25.06234    

Parameter Estimates

Parameter Estimates
Variable Label DF Parameter
Estimate		 Standard
Error		 t Value Pr > |t|
Intercept Intercept 1 1.70326 1.40615 1.21 0.2289
stay Av length of hospital stay, in days 1 0.40200 0.07867 5.11 <.0001
age Average patient age 1 -0.02535 0.02492 -1.02 0.3116
nbeds Average # beds during study period 1 -0.00131 0.00336 -0.39 0.6979
census Aver # patients in hospital per day 1 0.00052365 0.00461 0.11 0.9099
nurses Aver # nurses during study period 1 0.00204 0.00226 0.90 0.3693
service % of 35 potential facil. & services 1 0.01711 0.01259 1.36 0.1775
r1   1 -0.67266 0.40833 -1.65 0.1029
r2   1 -0.83537 0.37445 -2.23 0.0281
r3   1 -0.85760 0.35942 -2.39 0.0191
mschool   1 -0.21737 0.39298 -0.55 0.5815

Study of the Effectiveness of Nosocomial Infection Control

Multiple Regression One

Without xratio and culratio

The REG Procedure

Model: MODEL1

Dependent Variable: infrisk Prob of acquiring infection in hospital

Observation-wise Statistics

infrisk

Diagnostic Plots

Fit Diagnostics

Panel of fit diagnostics for infrisk.

Residual Plots

Panel 1

Panel of scatterplots of residuals by regressors for infrisk.

Panel 2

Panel of scatterplots of residuals by regressors for infrisk.

Study of the Effectiveness of Nosocomial Infection Control

Multiple Regression One

Without xratio and culratio

The REG Procedure

Model: MODEL1

Test Region

Results

Test Region Results for Dependent Variable infrisk
Source DF Mean
Square		 F Value Pr > F
Numerator 3 2.56113 2.14 0.1002
Denominator 91 1.19500    

Study of the Effectiveness of Nosocomial Infection Control

Multiple Regression One

Without xratio and culratio

The REG Procedure

Model: MODEL1

Test Size

Results

Test Size Results for Dependent Variable infrisk
Source DF Mean
Square		 F Value Pr > F
Numerator 3 0.44411 0.37 0.7736
Denominator 91 1.19500    

Study of the Effectiveness of Nosocomial Infection Control

Multiple Regression One

With xratio and culratio

The REG Procedure

Model: MODEL1

Dependent Variable: infrisk Prob of acquiring infection in hospital

The REG Procedure

MODEL1

Fit

infrisk

Number of Observations

Number of Observations Read 113
Number of Observations Used 102
Number of Observations with Missing Values 11

Analysis of Variance

Analysis of Variance
Source DF Sum of
Squares		 Mean
Square		 F Value Pr > F
Model 12 114.79487 9.56624 12.24 <.0001
Error 89 69.58601 0.78187    
Corrected Total 101 184.38088      

Fit Statistics

Root MSE 0.88423 R-Square 0.6226
Dependent Mean 4.36176 Adj R-Sq 0.5717
Coeff Var 20.27233    

Parameter Estimates

Parameter Estimates
Variable Label DF Parameter
Estimate		 Standard
Error		 t Value Pr > |t|
Intercept Intercept 1 -0.71797 1.19763 -0.60 0.5504
stay Av length of hospital stay, in days 1 0.20569 0.07023 2.93 0.0043
age Average patient age 1 0.02225 0.02131 1.04 0.2992
nbeds Average # beds during study period 1 -0.00390 0.00274 -1.42 0.1587
census Aver # patients in hospital per day 1 0.00815 0.00389 2.09 0.0390
nurses Aver # nurses during study period 1 -0.00179 0.00191 -0.93 0.3532
service % of 35 potential facil. & services 1 0.01854 0.01020 1.82 0.0726
xratio # x-rays / # no signs of pneumonia 1 0.00920 0.00537 1.71 0.0901
culratio # cultures / # no hosp acq infect 1 0.06567 0.01101 5.97 <.0001
r1   1 -1.07575 0.33529 -3.21 0.0019
r2   1 -1.02317 0.30444 -3.36 0.0011
r3   1 -0.90000 0.29265 -3.08 0.0028
mschool   1 -0.58169 0.32592 -1.78 0.0777

Study of the Effectiveness of Nosocomial Infection Control

Multiple Regression One

With xratio and culratio

The REG Procedure

Model: MODEL1

Dependent Variable: infrisk Prob of acquiring infection in hospital

Observation-wise Statistics

infrisk

Diagnostic Plots

Fit Diagnostics

Panel of fit diagnostics for infrisk.

Residual Plots

Panel 1

Panel of scatterplots of residuals by regressors for infrisk.

Panel 2

Panel of scatterplots of residuals by regressors for infrisk.

Study of the Effectiveness of Nosocomial Infection Control

Multiple Regression One

With xratio and culratio

The REG Procedure

Model: MODEL1

Test Region

Results

Test Region Results for Dependent Variable infrisk
Source DF Mean
Square		 F Value Pr > F
Numerator 3 3.54630 4.54 0.0053
Denominator 89 0.78187    

Study of the Effectiveness of Nosocomial Infection Control

Multiple Regression One

With xratio and culratio

The REG Procedure

Model: MODEL1

Test Size

Results

Test Size Results for Dependent Variable infrisk
Source DF Mean
Square		 F Value Pr > F
Numerator 3 1.41826 1.81 0.1504
Denominator 89 0.78187