Frequencies for mdcdesc variable in drg2mdcxw2004 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |         14        2.69        2.69
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         17        3.27        5.96
11: DISEASES & DISORDERS OF THE KIDNE.. |         32        6.15       12.12
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.65       15.77
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.27       19.04
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        2.88       21.92
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        1.35       23.27
16: DISEASES & DISORDERS OF BLOOD, BL.. |          8        1.54       24.81
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         18        3.46       28.27
18: INFECTIOUS & PARASITIC DISEASES, .. |          9        1.73       30.00
        19: MENTAL DISEASES & DISORDERS |          9        1.73       31.73
1: DISEASES & DISORDERS OF THE NERVOU.. |         42        8.08       39.81
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          4        0.77       40.58
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.27       43.85
                              22: BURNS |          8        1.54       45.38
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.35       46.73
        24: MULTIPLE SIGNIFICANT TRAUMA |          4        0.77       47.50
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          3        0.58       48.08
     2: DISEASES & DISORDERS OF THE EYE |         13        2.50       50.58
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        5.96       56.54
4: DISEASES & DISORDERS OF THE RESPIR.. |         29        5.58       62.12
5: DISEASES & DISORDERS OF THE CIRCUL.. |         52       10.00       72.12
6: DISEASES & DISORDERS OF THE DIGEST.. |         40        7.69       79.81
7: DISEASES & DISORDERS OF THE HEPATO.. |         20        3.85       83.65
8: DISEASES & DISORDERS OF THE MUSCUL.. |         57       10.96       94.62
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.38      100.00
----------------------------------------+-----------------------------------
                                  Total |        520      100.00

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