Frequencies for mdcdesc variable in drg2mdcxw1997 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |         10        2.02        2.02
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         17        3.43        5.44
11: DISEASES & DISORDERS OF THE KIDNE.. |         32        6.45       11.90
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.83       15.73
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.43       19.15
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        3.02       22.18
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        1.41       23.59
16: DISEASES & DISORDERS OF BLOOD, BL.. |          8        1.61       25.20
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         17        3.43       28.63
18: INFECTIOUS & PARASITIC DISEASES, .. |          9        1.81       30.44
        19: MENTAL DISEASES & DISORDERS |          9        1.81       32.26
1: DISEASES & DISORDERS OF THE NERVOU.. |         35        7.06       39.31
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          5        1.01       40.32
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.43       43.75
                              22: BURNS |          6        1.21       44.96
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.41       46.37
        24: MULTIPLE SIGNIFICANT TRAUMA |          4        0.81       47.18
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          3        0.60       47.78
     2: DISEASES & DISORDERS OF THE EYE |         13        2.62       50.40
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        6.25       56.65
4: DISEASES & DISORDERS OF THE RESPIR.. |         29        5.85       62.50
5: DISEASES & DISORDERS OF THE CIRCUL.. |         44        8.87       71.37
6: DISEASES & DISORDERS OF THE DIGEST.. |         40        8.06       79.44
7: DISEASES & DISORDERS OF THE HEPATO.. |         20        4.03       83.47
8: DISEASES & DISORDERS OF THE MUSCUL.. |         54       10.89       94.35
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.65      100.00
----------------------------------------+-----------------------------------
                                  Total |        496      100.00

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