Frequencies for mdcdesc variable in drg2005 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                        |         33        6.08        6.08
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |         14        2.58        8.66
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         17        3.13       11.79
11: DISEASES & DISORDERS OF THE KIDNE.. |         32        5.89       17.68
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.50       21.18
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.13       24.31
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        2.76       27.07
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        1.29       28.36
16: DISEASES & DISORDERS OF BLOOD, BL.. |          8        1.47       29.83
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         18        3.31       33.15
18: INFECTIOUS & PARASITIC DISEASES, .. |          9        1.66       34.81
        19: MENTAL DISEASES & DISORDERS |          9        1.66       36.46
1: DISEASES & DISORDERS OF THE NERVOU.. |         42        7.73       44.20
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          4        0.74       44.94
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.13       48.07
                              22: BURNS |          8        1.47       49.54
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.29       50.83
        24: MULTIPLE SIGNIFICANT TRAUMA |          4        0.74       51.57
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          3        0.55       52.12
     2: DISEASES & DISORDERS OF THE EYE |         13        2.39       54.51
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        5.71       60.22
4: DISEASES & DISORDERS OF THE RESPIR.. |         29        5.34       65.56
5: DISEASES & DISORDERS OF THE CIRCUL.. |         43        7.92       73.48
6: DISEASES & DISORDERS OF THE DIGEST.. |         40        7.37       80.85
7: DISEASES & DISORDERS OF THE HEPATO.. |         20        3.68       84.53
8: DISEASES & DISORDERS OF THE MUSCUL.. |         56       10.31       94.84
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.16      100.00
----------------------------------------+-----------------------------------
                                  Total |        543      100.00

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