Frequencies for mdcdesc variable in drg2mdcxw2001 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |         12        2.37        2.37
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         17        3.36        5.73
11: DISEASES & DISORDERS OF THE KIDNE.. |         32        6.32       12.06
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.75       15.81
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.36       19.17
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        2.96       22.13
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        1.38       23.52
16: DISEASES & DISORDERS OF BLOOD, BL.. |          8        1.58       25.10
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         17        3.36       28.46
18: INFECTIOUS & PARASITIC DISEASES, .. |          9        1.78       30.24
        19: MENTAL DISEASES & DISORDERS |          9        1.78       32.02
1: DISEASES & DISORDERS OF THE NERVOU.. |         35        6.92       38.93
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          4        0.79       39.72
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.36       43.08
                              22: BURNS |          8        1.58       44.66
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.38       46.05
        24: MULTIPLE SIGNIFICANT TRAUMA |          4        0.79       46.84
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          3        0.59       47.43
     2: DISEASES & DISORDERS OF THE EYE |         13        2.57       50.00
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        6.13       56.13
4: DISEASES & DISORDERS OF THE RESPIR.. |         29        5.73       61.86
5: DISEASES & DISORDERS OF THE CIRCUL.. |         49        9.68       71.54
6: DISEASES & DISORDERS OF THE DIGEST.. |         40        7.91       79.45
7: DISEASES & DISORDERS OF THE HEPATO.. |         20        3.95       83.40
8: DISEASES & DISORDERS OF THE MUSCUL.. |         56       11.07       94.47
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.53      100.00
----------------------------------------+-----------------------------------
                                  Total |        506      100.00

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