Frequencies for mdcdesc variable in drg2mdcxw1993 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |          9        1.83        1.83
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         17        3.46        5.30
11: DISEASES & DISORDERS OF THE KIDNE.. |         32        6.52       11.81
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.87       15.68
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.46       19.14
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        3.05       22.20
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        1.43       23.63
16: DISEASES & DISORDERS OF BLOOD, BL.. |          8        1.63       25.25
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         17        3.46       28.72
18: INFECTIOUS & PARASITIC DISEASES, .. |          9        1.83       30.55
        19: MENTAL DISEASES & DISORDERS |          9        1.83       32.38
1: DISEASES & DISORDERS OF THE NERVOU.. |         35        7.13       39.51
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          5        1.02       40.53
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.46       43.99
                              22: BURNS |          6        1.22       45.21
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.43       46.64
        24: MULTIPLE SIGNIFICANT TRAUMA |          4        0.81       47.45
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          3        0.61       48.07
     2: DISEASES & DISORDERS OF THE EYE |         13        2.65       50.71
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        6.31       57.03
4: DISEASES & DISORDERS OF THE RESPIR.. |         29        5.91       62.93
5: DISEASES & DISORDERS OF THE CIRCUL.. |         44        8.96       71.89
6: DISEASES & DISORDERS OF THE DIGEST.. |         40        8.15       80.04
7: DISEASES & DISORDERS OF THE HEPATO.. |         20        4.07       84.11
8: DISEASES & DISORDERS OF THE MUSCUL.. |         50       10.18       94.30
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.70      100.00
----------------------------------------+-----------------------------------
                                  Total |        491      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016