Summary statistics for 1998_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~1998 | 3,437 15428.79 452334.3 76 2.65e+07 allsurgica~i | 3,404 99.58858 13.70177 55.71635 168.1929 backsurger~l | 855 3.312002 1.245843 .7331606 8.390316 -------------+--------------------------------------------------------- coronaryan~a | 2,784 20.21863 6.668171 4.782736 69.70079 coronaryar~g | 1,577 6.372173 1.706825 2.217673 14.8324 percutaneo~n | 1,788 8.221924 3.379096 1.883222 40.05805 carotidend~i | 894 3.509038 1.276156 .7246513 8.44159 cholecyste~n | 1,254 4.779351 1.332089 1.778159 11.94081 -------------+--------------------------------------------------------- hospitaliz~r | 1,853 8.281392 1.487924 3.669611 14.87884 hipreplace~r | 665 2.613711 .7432083 .6617174 4.999749 kneereplac~n | 1,321 5.201451 1.567514 1.165659 13.85619 mastect~1000 | 182 1.634692 .4482442 .5598783 2.872675 resectionf~e | 490 2.010307 .3932493 .8210177 3.724527 -------------+--------------------------------------------------------- lowerextre~p | 407 1.932205 .6404281 .507167 5.051081 transureth~n | 752 7.079784 2.502885 1.554367 26.27936 aorticmitr~1 | 302 1.415882 .4083024 .5230772 3.736691 by Jean Roth , jroth@nber.org , 14 Mar 2018