Frequencies for mdcdesc variable in drg2mdcxw2002 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |         12        2.35        2.35
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         17        3.33        5.69
11: DISEASES & DISORDERS OF THE KIDNE.. |         32        6.27       11.96
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.73       15.69
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.33       19.02
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        2.94       21.96
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        1.37       23.33
16: DISEASES & DISORDERS OF BLOOD, BL.. |          8        1.57       24.90
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         17        3.33       28.24
18: INFECTIOUS & PARASITIC DISEASES, .. |          9        1.76       30.00
        19: MENTAL DISEASES & DISORDERS |          9        1.76       31.76
1: DISEASES & DISORDERS OF THE NERVOU.. |         36        7.06       38.82
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          4        0.78       39.61
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.33       42.94
                              22: BURNS |          8        1.57       44.51
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.37       45.88
        24: MULTIPLE SIGNIFICANT TRAUMA |          4        0.78       46.67
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          3        0.59       47.25
     2: DISEASES & DISORDERS OF THE EYE |         13        2.55       49.80
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        6.08       55.88
4: DISEASES & DISORDERS OF THE RESPIR.. |         29        5.69       61.57
5: DISEASES & DISORDERS OF THE CIRCUL.. |         52       10.20       71.76
6: DISEASES & DISORDERS OF THE DIGEST.. |         40        7.84       79.61
7: DISEASES & DISORDERS OF THE HEPATO.. |         20        3.92       83.53
8: DISEASES & DISORDERS OF THE MUSCUL.. |         56       10.98       94.51
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.49      100.00
----------------------------------------+-----------------------------------
                                  Total |        510      100.00

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