Summary statistics for demo2004q1 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 65975 4303968 21499.93 4204616 4498036 caseid | 65968 4085808 65899.12 3000170 5674715 i_f_code | 0 i_f_code_num | 65971 71.46001 .887923 70 72 foll_seq | 0 -------------+-------------------------------------------------------- image | 0 event_dt | 45431 2.00e+07 391490.9 1.90e+07 9.20e+07 event_dt_num | 45431 15900.74 14298.38 -20490 2644022 mfr_dt | 60703 2.00e+07 147426.5 1.98e+07 5.20e+07 mfr_dt_num | 60703 16072.28 5382.841 8089 1183441 -------------+-------------------------------------------------------- fda_dt | 65975 2.00e+07 118.9685 2.00e+07 2.00e+07 fda_dt_num | 65975 16122.36 25.26601 15984 16161 rept_cod | 0 rept_cod_num | 65975 738147.3 53029.75 687382 806982 mfr_num | 0 -------------+-------------------------------------------------------- mfr_sndr | 0 age | 49385 51.28236 38.01077 -365 6800 age_cod | 0 sex | 0 e_sub | 0 -------------+-------------------------------------------------------- wt | 22622 131.1853 4388.085 0 660000 wt_cod | 0 rept_dt | 65572 2.00e+07 67694.17 2.00e+07 3.00e+07 rept_dt_num | 65572 16128.04 2471.298 13149 381402 occp_cod | 0 -------------+-------------------------------------------------------- death_dt | 5051 2.00e+07 133696.1 1.94e+07 2.92e+07 to_mfr | 0 confid | 0 occp_cod_num | 48793 7580.09 493.5812 6778 8072 by Jean Roth , jroth@nber.org , 18 Dec 2015