Frequencies for mdcdesc variable in drg2mdcxw1992 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        5.28
11: DISEASES & DISORDERS OF THE KIDNE.. |         32        6.50       11.79
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.86       15.65
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.46       19.11
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        3.05       22.15
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        1.42       23.58
16: DISEASES & DISORDERS OF BLOOD, BL.. |          8        1.63       25.20
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         17        3.46       28.66
18: INFECTIOUS & PARASITIC DISEASES, .. |          9        1.83       30.49
        19: MENTAL DISEASES & DISORDERS |          9        1.83       32.32
1: DISEASES & DISORDERS OF THE NERVOU.. |         35        7.11       39.43
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          6        1.22       40.65
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.46       44.11
                              22: BURNS |          6        1.22       45.33
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.42       46.75
        24: MULTIPLE SIGNIFICANT TRAUMA |          4        0.81       47.56
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          3        0.61       48.17
     2: DISEASES & DISORDERS OF THE EYE |         13        2.64       50.81
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        6.30       57.11
4: DISEASES & DISORDERS OF THE RESPIR.. |         30        6.10       63.21
5: DISEASES & DISORDERS OF THE CIRCUL.. |         45        9.15       72.36
6: DISEASES & DISORDERS OF THE DIGEST.. |         40        8.13       80.49
7: DISEASES & DISORDERS OF THE HEPATO.. |         18        3.66       84.15
8: DISEASES & DISORDERS OF THE MUSCUL.. |         50       10.16       94.31
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.69      100.00
----------------------------------------+-----------------------------------
                                  Total |        492      100.00

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