Summary statistics for 1997_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~1997 | 3,437 15854.89 464833.5 80 2.72e+07 allsurgica~i | 3,402 98.26891 13.3436 49.64326 164.4808 backsurger~l | 807 3.06355 1.2084 .9109774 9.189118 -------------+--------------------------------------------------------- coronaryan~a | 2,758 19.37255 6.328031 4.430572 57.36777 coronaryar~g | 1,620 6.474836 1.694866 2.360204 13.37046 percutaneo~n | 1,661 7.454804 3.066656 1.375068 34.2387 carotidend~i | 915 3.504125 1.265308 .9894621 8.188753 cholecyste~n | 1,280 4.873451 1.359164 1.800856 12.9608 -------------+--------------------------------------------------------- hospitaliz~r | 1,889 8.331615 1.429753 2.874885 14.57196 hipreplace~r | 659 2.490329 .6875627 .8328816 5.153592 kneereplac~n | 1,356 5.344389 1.598197 1.260803 12.64724 mastect~1000 | 199 1.652863 .4438738 .6760246 2.947476 resectionf~e | 499 1.983054 .3756762 .8109086 3.390325 -------------+--------------------------------------------------------- lowerextre~p | 429 1.932625 .6462408 .65977 4.817153 transureth~n | 866 7.887993 2.815751 1.680488 25.21896 aorticmitr~1 | 296 1.363775 .3424299 .5946248 2.69598 by Jean Roth , jroth@nber.org , 14 Mar 2018