Summary statistics for 1994_surg_discharges_hsa dataset : by Jean Roth , jroth@nber.org , 14 Mar 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- hsanumber | 3,437 26325.03 14845.04 1001 99999 hsalabel | 0 medicar~1994 | 3,437 17003.77 498548.9 65 2.92e+07 allsurgica~i | 3,395 93.03375 12.10975 46.85896 170.5332 backsurger~l | 730 2.623405 1.032926 .5854205 7.500026 -------------+--------------------------------------------------------- coronaryan~a | 2,639 16.34391 5.374046 3.672848 50.39106 coronaryar~g | 1,466 5.537389 1.387965 1.77302 11.20558 percutaneo~n | 1,385 5.700514 2.309921 1.329841 20.60291 carotidend~i | 677 2.538149 .9993088 .548281 7.035021 cholecyste~n | 1,385 5.266406 1.415454 2.067191 12.18268 -------------+--------------------------------------------------------- hospitaliz~r | 1,874 7.993165 1.362803 2.843037 13.94422 hipreplace~r | 627 2.251518 .6282147 .6187133 4.579832 kneereplac~n | 1,200 4.431136 1.389755 1.198515 11.30416 mastect~1000 | 309 2.150944 .5260648 1.062951 3.95224 resectionf~e | 533 1.939693 .3866401 .7897364 3.163765 -------------+--------------------------------------------------------- lowerextre~p | 446 1.892286 .6294924 .4986633 4.099404 transureth~n | 1,140 10.06202 3.592417 2.845979 40.96852 aorticmitr~1 | 234 1.106854 .2983281 .3668117 2.172189 by Jean Roth , jroth@nber.org , 14 Mar 2018