Frequencies for mdcdesc variable in drg2002 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                        |         17        3.25        3.25
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |         12        2.29        5.54
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         17        3.25        8.80
11: DISEASES & DISORDERS OF THE KIDNE.. |         32        6.12       14.91
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.63       18.55
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.25       21.80
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        2.87       24.67
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        1.34       26.00
16: DISEASES & DISORDERS OF BLOOD, BL.. |          8        1.53       27.53
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         17        3.25       30.78
18: INFECTIOUS & PARASITIC DISEASES, .. |          9        1.72       32.50
        19: MENTAL DISEASES & DISORDERS |          9        1.72       34.23
1: DISEASES & DISORDERS OF THE NERVOU.. |         35        6.69       40.92
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          4        0.76       41.68
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.25       44.93
                              22: BURNS |          8        1.53       46.46
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.34       47.80
        24: MULTIPLE SIGNIFICANT TRAUMA |          4        0.76       48.57
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          3        0.57       49.14
     2: DISEASES & DISORDERS OF THE EYE |         13        2.49       51.63
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        5.93       57.55
4: DISEASES & DISORDERS OF THE RESPIR.. |         29        5.54       63.10
5: DISEASES & DISORDERS OF THE CIRCUL.. |         49        9.37       72.47
6: DISEASES & DISORDERS OF THE DIGEST.. |         40        7.65       80.11
7: DISEASES & DISORDERS OF THE HEPATO.. |         20        3.82       83.94
8: DISEASES & DISORDERS OF THE MUSCUL.. |         56       10.71       94.65
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.35      100.00
----------------------------------------+-----------------------------------
                                  Total |        523      100.00

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