The SAS System 1 10:37 Monday, March 10, 1997 Stepwise Procedure for Dependent Variable RISK Step 1 Group Culture Entered R-square = 0.31265864 C(p) = 58.36413224 DF Sum of Squares Mean Square F Prob>F Regression 1 62.96314170 62.96314170 50.49 0.0001 Error 111 138.41668131 1.24699713 Total 112 201.37982301 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP 3.19789965 0.19376813 339.64905575 272.37 0.0001 --- Group Culture --- 62.96314170 50.49 0.0001 CULTURE 0.07325862 0.01030975 62.96314170 50.49 0.0001 Bounds on condition number: 1, 1 -------------------------------------------------------------------------------- Step 2 Group Stay Entered R-square = 0.45040256 C(p) = 26.82418731 DF Sum of Squares Mean Square F Prob>F Regression 2 90.70198757 45.35099379 45.07 0.0001 Error 110 110.67783543 1.00616214 Total 112 201.37982301 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP 0.80549102 0.48775579 2.74400250 2.73 0.1015 --- Group Culture --- 33.39687778 33.19 0.0001 CULTURE 0.05645147 0.00979843 33.39687778 33.19 0.0001 --- Group Stay --- 27.73884588 27.57 0.0001 STAY 0.27547211 0.05246473 27.73884588 27.57 0.0001 Bounds on condition number: 1.119473, 4.477891 -------------------------------------------------------------------------------- Step 3 Group Facil Entered R-square = 0.49340010 C(p) = 18.35450472 DF Sum of Squares Mean Square F Prob>F Regression 3 99.36082444 33.12027481 35.39 0.0001 Error 109 102.01899857 0.93595412 Total 112 201.37982301 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP 0.49133226 0.48163614 0.97401801 1.04 0.3099 --- Group Culture --- 30.59827862 32.69 0.0001 CULTURE 0.05419997 0.00947933 30.59827862 32.69 0.0001 --- Group Stay --- 16.47664606 17.60 0.0001 STAY 0.22390748 0.05336561 16.47664606 17.60 0.0001 --- Group Facil --- 8.65883687 9.25 0.0029 The SAS System 2 10:37 Monday, March 10, 1997 FACIL 0.01963027 0.00645392 8.65883687 9.25 0.0029 Bounds on condition number: 1.245131, 10.56958 -------------------------------------------------------------------------------- Step 4 Group Nratio Entered R-square = 0.52547952 C(p) = 12.54332929 DF Sum of Squares Mean Square F Prob>F Regression 4 105.82097194 26.45524298 29.90 0.0001 Error 108 95.55885107 0.88480418 Total 112 201.37982301 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP -0.49505513 0.59376426 0.61507231 0.70 0.4063 --- Group Culture --- 22.84513509 25.82 0.0001 CULTURE 0.04818092 0.00948204 22.84513509 25.82 0.0001 --- Group Stay --- 21.44995791 24.24 0.0001 STAY 0.26758404 0.05434637 21.44995791 24.24 0.0001 --- Group Nratio --- 6.46014750 7.30 0.0080 NRATIO 0.79262357 0.29333869 6.46014750 7.30 0.0080 --- Group Facil --- 6.75349077 7.63 0.0067 FACIL 0.01747585 0.00632554 6.75349077 7.63 0.0067 Bounds on condition number: 1.365968, 19.41852 -------------------------------------------------------------------------------- Step 5 Group Chest Entered R-square = 0.53792463 C(p) = 11.51300690 DF Sum of Squares Mean Square F Prob>F Regression 5 108.32716704 21.66543341 24.91 0.0001 Error 107 93.05265597 0.86965099 Total 112 201.37982301 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP -0.76804342 0.61022741 1.37763165 1.58 0.2109 --- Group Culture --- 16.71979631 19.23 0.0001 CULTURE 0.04318856 0.00984976 16.71979631 19.23 0.0001 --- Group Stay --- 14.43814950 16.60 0.0001 STAY 0.23392650 0.05741114 14.43814950 16.60 0.0001 --- Group Nratio --- 4.38883521 5.05 0.0267 NRATIO 0.67240318 0.29931440 4.38883521 5.05 0.0267 --- Group Chest --- 2.50619510 2.88 0.0925 CHEST 0.00917860 0.00540681 2.50619510 2.88 0.0925 --- Group Facil --- 7.45710068 8.57 0.0042 FACIL 0.01843860 0.00629673 7.45710068 8.57 0.0042 Bounds on condition number: 1.550936, 33.22156 -------------------------------------------------------------------------------- The SAS System 3 10:37 Monday, March 10, 1997 Step 6 Group Region Entered R-square = 0.56825843 C(p) = 10.12688089 DF Sum of Squares Mean Square F Prob>F Regression 8 114.43578204 14.30447276 17.11 0.0001 Error 104 86.94404096 0.83600039 Total 112 201.37982301 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP -0.66156855 0.68931767 0.77004723 0.92 0.3394 --- Group Culture --- 19.41848300 23.23 0.0001 CULTURE 0.04717749 0.00978882 19.41848300 23.23 0.0001 --- Group Stay --- 18.64724032 22.31 0.0001 STAY 0.28408192 0.06015054 18.64724032 22.31 0.0001 --- Group Nratio --- 1.86769604 2.23 0.1380 NRATIO 0.47735146 0.31936579 1.86769604 2.23 0.1380 --- Group Region --- 6.10861501 2.44 0.0689 R1 -0.91152625 0.33831556 6.06877293 7.26 0.0082 R2 -0.61170886 0.30630883 3.33408744 3.99 0.0484 R3 -0.54005754 0.30531855 2.61565335 3.13 0.0799 --- Group Chest --- 3.10587423 3.72 0.0566 CHEST 0.01029102 0.00533912 3.10587423 3.72 0.0566 --- Group Facil --- 7.66252029 9.17 0.0031 FACIL 0.01883340 0.00622080 7.66252029 9.17 0.0031 Bounds on condition number: 2.883606, 123.1302 -------------------------------------------------------------------------------- Step 7 Group School Entered R-square = 0.57830628 C(p) = 9.68027972 DF Sum of Squares Mean Square F Prob>F Regression 9 116.45921688 12.93991299 15.69 0.0001 Error 103 84.92060613 0.82447190 Total 112 201.37982301 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP -1.29313397 0.79443852 2.18445103 2.65 0.1066 --- Group School --- 2.02343484 2.45 0.1203 S1 0.45874175 0.29282732 2.02343484 2.45 0.1203 --- Group Culture --- 21.14238169 25.64 0.0001 CULTURE 0.05016596 0.00990650 21.14238169 25.64 0.0001 --- Group Stay --- 19.90843811 24.15 0.0001 STAY 0.29583936 0.06020399 19.90843811 24.15 0.0001 --- Group Nratio --- 1.42881407 1.73 0.1909 NRATIO 0.42026288 0.31924279 1.42881407 1.73 0.1909 --- Group Region --- 7.09035688 2.87 0.0402 R1 -0.99737538 0.34041455 7.07745167 8.58 0.0042 R2 -0.64425716 0.30489819 3.68115979 4.46 0.0370 R3 -0.59950685 0.30557155 3.17349874 3.85 0.0525 --- Group Chest --- 2.85453005 3.46 0.0656 CHEST 0.00987802 0.00530873 2.85453005 3.46 0.0656 --- Group Facil --- 9.68526975 11.75 0.0009 The SAS System 4 10:37 Monday, March 10, 1997 FACIL 0.02391008 0.00697611 9.68526975 11.75 0.0009 Bounds on condition number: 2.960322, 157.1138 -------------------------------------------------------------------------------- Step 8 Group Nratio Removed R-square = 0.57121116 C(p) = 9.40790549 DF Sum of Squares Mean Square F Prob>F Regression 8 115.03040281 14.37880035 17.32 0.0001 Error 104 86.34942020 0.83028289 Total 112 201.37982301 Parameter Standard Type II Variable Estimate Error Sum of Squares F Prob>F INTERCEP -0.83240584 0.71570292 1.12313185 1.35 0.2475 --- Group School --- 2.46231681 2.97 0.0880 S1 0.50274483 0.29193670 2.46231681 2.97 0.0880 --- Group Culture --- 23.66688888 28.50 0.0001 CULTURE 0.05233635 0.00980270 23.66688888 28.50 0.0001 --- Group Stay --- 18.47964968 22.26 0.0001 STAY 0.27469386 0.05822575 18.47964968 22.26 0.0001 --- Group Region --- 9.68716458 3.89 0.0111 R1 -1.10696516 0.33123989 9.27275385 11.17 0.0012 R2 -0.76673818 0.29137725 5.74922078 6.92 0.0098 R3 -0.75936643 0.28139304 6.04647398 7.28 0.0081 --- Group Chest --- 3.92124933 4.72 0.0320 CHEST 0.01132621 0.00521177 3.92124933 4.72 0.0320 --- Group Facil --- 11.30278424 13.61 0.0004 FACIL 0.02545939 0.00690031 11.30278424 13.61 0.0004 Bounds on condition number: 2.783285, 118.9696 -------------------------------------------------------------------------------- All groups of variables left in the model are significant at the 0.1500 level. No other group of variables met the 0.1500 significance level for entry into the model. Summary of Stepwise Procedure for Dependent Variable RISK Group Number Partial Model Step Entered Removed In R**2 R**2 C(p) F Prob>F 1 Culture 1 0.3127 0.3127 58.3641 50.4918 0.0000 2 Stay 2 0.1377 0.4504 26.8242 27.5690 0.0000 3 Facil 3 0.0430 0.4934 18.3545 9.2513 0.0029 4 Nratio 4 0.0321 0.5255 12.5433 7.3012 0.0080 5 Chest 5 0.0124 0.5379 11.5130 2.8818 0.0925 6 Region 8 0.0303 0.5683 10.1269 2.4357 0.0689 7 School 9 0.0100 0.5783 9.6803 2.4542 0.1203 8 Nratio 8 0.0071 0.5712 9.4079 1.7330 0.1909