Table AI
   Analytic Data Structure (ADS) For Facility Comparison Analyses

    F    S    L    P   obs_c1   exp_c1  ...   obs_cj   exp_cj


    1    1    1   40      0      0.31   ...
    1    1    1   45      7      21.7   ...
    .    .    .    .      .       .       
    .    .    .    .      .       .        
    .    .    .    .      .       .
    5    2    2   75      0      1.0    ...
    5    2    2   80      0      1.5    ...  

where the factors are defined as follows: Socioeconomic Length of Period of F Facility S Status L Employment P Follow-Up

1= X-10 1= Non-Monthly 1= >1 year 1= 1940 2= TEC 2= Monthly 2= <=1 year 2= 1945 3= Y-12 . . 4= K-25 . . 5= MULT . . 8= 1975 9= 1980