options linesize=80 pagesize = 60; data after; input g b count @@; cards; 1 1 435 1 2 147 2 1 375 2 2 134 ; proc freq; weight count; tables g*b /expected; proc genmod; class g b; model count = g b / dist=poi link=log obstats; run; proc genmod; class g b; model count = g b g*b / dist=poi link=log obstats; run; --------------------------------------------------------- The SAS System 13:00 Monday, May 7, 2001 5 The FREQ Procedure Table of g by b g b Frequency| Expected | Percent | Row Pct | Col Pct | 1| 2| Total ---------+--------+--------+ 1 | 435 | 147 | 582 | 432.1 | 149.9 | | 39.87 | 13.47 | 53.35 | 74.74 | 25.26 | | 53.70 | 52.31 | ---------+--------+--------+ 2 | 375 | 134 | 509 | 377.9 | 131.1 | | 34.37 | 12.28 | 46.65 | 73.67 | 26.33 | | 46.30 | 47.69 | ---------+--------+--------+ Total 810 281 1091 74.24 25.76 100.00 The GENMOD Procedure Model Information Data Set WORK.AFTER Distribution Poisson Link Function Log Dependent Variable count Observations Used 4 Class Level Information Class Levels Values g 2 1 2 b 2 1 2 Criteria For Assessing Goodness Of Fit Criterion DF Value Value/DF Deviance 1 0.1620 0.1620 Scaled Deviance 1 0.1620 0.1620 Pearson Chi-Square 1 0.1621 0.1621 Scaled Pearson X2 1 0.1621 0.1621 Log Likelihood 5164.1959 Analysis Of Parameter Estimates Standard Wald 95% Chi- Parameter DF Estimate Error Confidence Limits Square Pr > ChiSq Intercept 1 4.8760 0.0679 4.7429 5.0090 5160.87 <.0001 g 1 1 0.1340 0.0607 0.0151 0.2530 4.88 0.0272 g 2 0 0.0000 0.0000 0.0000 0.0000 . . b 1 1 1.0587 0.0692 0.9230 1.1944 233.83 <.0001 b 2 0 0.0000 0.0000 0.0000 0.0000 . . Scale 0 1.0000 0.0000 1.0000 1.0000 NOTE: The scale parameter was held fixed. Observation Statistics Observation count g b Pred Xbeta Std HessWgt Lower Upper Resraw Reschi Resdev StResdev StReschi Reslik 1 435 1 1 432.09899 6.0686547 0.0451242 432.09899 395.52459 472.05545 2.9010083 0.1395588 0.1394031 0.4021473 0.4025965 0.4025426 2 147 1 2 149.90101 5.0099752 0.0660329 149.90101 131.70349 170.6129 -2.901012 -0.236945 -0.237715 -0.403906 -0.402597 -0.403051 3 375 2 1 377.90101 5.9346323 0.0477767 377.90101 344.12042 414.99767 -2.901009 -0.149231 -0.149423 -0.403113 -0.402597 -0.402668 4 134 2 2 131.09899 4.8759527 0.0678732 131.09899 114.76927 149.75216 2.9010052 0.2533663 0.2524404 0.4011248 0.4025961 0.402014 The SAS System 13:00 Monday, May 7, 2001 8 The GENMOD Procedure Model Information Data Set WORK.AFTER Distribution Poisson Link Function Log Dependent Variable count Observations Used 4 Class Level Information Class Levels Values g 2 1 2 b 2 1 2 Criteria For Assessing Goodness Of Fit Criterion DF Value Value/DF Deviance 0 0.0000 . Scaled Deviance 0 0.0000 . Pearson Chi-Square 0 0.0000 . Scaled Pearson X2 0 0.0000 . Log Likelihood 5164.2769 Analysis Of Parameter Estimates Standard Wald 95% Chi- Parameter DF Estimate Error Confidence Limits Square Pr > ChiSq Intercept 1 4.8978 0.0864 4.7285 5.0672 3214.50 <.0001 g 1 1 0.0926 0.1194 -0.1415 0.3267 0.60 0.4382 g 2 0 0.0000 0.0000 0.0000 0.0000 . . b 1 1 1.0291 0.1006 0.8318 1.2263 104.55 <.0001 b 2 0 0.0000 0.0000 0.0000 0.0000 . . g*b 1 1 1 0.0558 0.1387 -0.2160 0.3276 0.16 0.6873 g*b 1 2 0 0.0000 0.0000 0.0000 0.0000 . . g*b 2 1 0 0.0000 0.0000 0.0000 0.0000 . . g*b 2 2 0 0.0000 0.0000 0.0000 0.0000 . . Scale 0 1.0000 0.0000 1.0000 1.0000 Observation Statistics Observation count g b Pred Xbeta Std HessWgt Lower Upper Resraw Reschi Resdev StResdev StReschi Reslik 1 435 1 1 435 6.075346 0.0479463 435 395.98366 477.86063 -5.68E-14 -2.73E-15 -1.09E-8 -0.292133 -7.304E-8 -7.385E-8 2 147 1 2 147 4.9904326 0.0824786 147 125.05798 172.79185 -8.53E-14 -7.03E-15 -7.736E-9 -0.285883 -2.599E-7 -2.6E-7 3 375 2 1 375 5.926926 0.0516398 375 338.903 414.94174 -2.84E-13 -1.47E-14 0 . . . 4 134 2 2 134 4.8978398 0.0863868 134 113.12854 158.7221 -3.13E-13 -2.7E-14 0 0 -6.674E-7 -6.674E-7