Summary statistics for 1999_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~1999 | 3,437 15292.38 448330.5 81 2.63e+07 allsurgica~i | 3,404 100.4901 14.29816 38.68434 179.9501 backsurger~l | 884 3.391074 1.291118 .7614852 9.319005 -------------+--------------------------------------------------------- coronaryan~a | 2,808 21.00521 6.869484 3.981332 66.16184 coronaryar~g | 1,553 6.299505 1.697316 1.675837 13.53986 percutaneo~n | 1,854 8.814958 3.513771 1.781376 42.51257 carotidend~i | 872 3.479384 1.301089 .725724 9.842918 cholecyste~n | 1,250 4.783728 1.464161 1.157254 15.3836 -------------+--------------------------------------------------------- hospitaliz~r | 1,841 8.326919 1.477602 2.326833 13.64865 hipreplace~r | 665 2.611689 .7416619 .7189206 5.168426 kneereplac~n | 1,325 5.209489 1.549435 1.361395 11.50872 mastect~1000 | 171 1.511159 .463427 .5966894 2.936796 resectionf~e | 476 1.964768 .3928028 .9883261 3.270457 -------------+--------------------------------------------------------- lowerextre~p | 385 1.861381 .6257926 .543537 5.05868 transureth~n | 709 6.792247 2.340753 1.682157 21.32662 aorticmitr~1 | 307 1.428758 .3812067 .5476459 2.970854 by Jean Roth , jroth@nber.org , 14 Mar 2018