Frequencies for mdcdesc variable in drg1988 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |          5        1.05        1.05
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         17        3.56        4.61
11: DISEASES & DISORDERS OF THE KIDNE.. |         32        6.71       11.32
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.98       15.30
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.56       18.87
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        3.14       22.01
15: NEWBRNS & OTHER NEONATES WITH CON.. |          7        1.47       23.48
16: DISEASES & DISORDERS OF BLOOD & B.. |          8        1.68       25.16
       17: MYELOPROLIFERATIVE DISORDERS |         16        3.35       28.51
    18: INFECTIOUS & PARASITIC DISEASES |          9        1.89       30.40
        19: MENTAL DISEASES & DISORDERS |          9        1.89       32.29
1: DISEASES & DISORDERS OF THE NERVOU.. |         35        7.34       39.62
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          6        1.26       40.88
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.56       44.44
                              22: BURNS |          6        1.26       45.70
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.47       47.17
     2: DISEASES & DISORDERS OF THE EYE |         13        2.73       49.90
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        6.50       56.39
4: DISEASES & DISORDERS OF THE RESPIR.. |         30        6.29       62.68
5: DISEASES & DISORDERS OF THE CIRCUL.. |         43        9.01       71.70
6: DISEASES & DISORDERS OF THE DIGEST.. |         40        8.39       80.08
7: DISEASES & DISORDERS OF THE HEPATO.. |         18        3.77       83.86
8: DISEASES & DISORDERS OF THE MUSCUL.. |         49       10.27       94.13
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.87      100.00
----------------------------------------+-----------------------------------
                                  Total |        477      100.00

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