Summary statistics for 1997_surg_discharges_hrr dataset : by Jean Roth , jroth@nber.org , 14 Mar 2018 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- hrrnumber | 307 251.0912 131.2625 1 999 hrrlabel | 0 medicar~1997 | 307 177502.5 1552079 12708 2.72e+07 allsurgica~i | 307 98.26354 8.87176 64.12614 135.0581 abdominala~r | 306 .8843519 .6812068 -1.73379 1.75642 -------------+--------------------------------------------------------- backsurger~l | 307 3.203171 1.060599 1.15885 8.607857 coronaryan~a | 307 19.83505 5.137959 8.654845 40.71303 coronaryar~g | 307 6.430603 1.329914 2.935606 10.80065 percutaneo~n | 307 7.748519 2.659215 2.403958 20.83767 carotidend~i | 307 3.522045 1.032006 1.187801 6.888323 -------------+--------------------------------------------------------- cholecyste~n | 307 4.935531 .9050954 2.961341 8.707209 hospitaliz~r | 307 8.274574 .898891 5.572529 11.11841 hipreplace~r | 307 2.525628 .6591298 .8654878 4.536308 kneereplac~n | 307 5.562223 1.333247 2.043178 10.28053 mastect~1000 | 306 1.396799 1.256323 -3.48935 3.452515 -------------+--------------------------------------------------------- resectionf~e | 307 1.938884 .3714375 -2.253482 2.64518 lowerextre~p | 305 1.804677 .563921 .4841517 3.828976 transureth~n | 307 7.893543 1.923936 3.009351 16.89427 aorticmitr~1 | 306 1.185689 .5820164 -1.641034 2.332016 by Jean Roth , jroth@nber.org , 14 Mar 2018