Frequencies for mdcdesc variable in drg2mdcxw2000 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |         10        2.00        2.00
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         17        3.41        5.41
11: DISEASES & DISORDERS OF THE KIDNE.. |         32        6.41       11.82
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.81       15.63
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.41       19.04
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        3.01       22.04
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        1.40       23.45
16: DISEASES & DISORDERS OF BLOOD, BL.. |          8        1.60       25.05
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         17        3.41       28.46
18: INFECTIOUS & PARASITIC DISEASES, .. |          9        1.80       30.26
        19: MENTAL DISEASES & DISORDERS |          9        1.80       32.06
1: DISEASES & DISORDERS OF THE NERVOU.. |         35        7.01       39.08
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          5        1.00       40.08
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.41       43.49
                              22: BURNS |          8        1.60       45.09
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.40       46.49
        24: MULTIPLE SIGNIFICANT TRAUMA |          4        0.80       47.29
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          3        0.60       47.90
     2: DISEASES & DISORDERS OF THE EYE |         13        2.61       50.50
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        6.21       56.71
4: DISEASES & DISORDERS OF THE RESPIR.. |         29        5.81       62.53
5: DISEASES & DISORDERS OF THE CIRCUL.. |         45        9.02       71.54
6: DISEASES & DISORDERS OF THE DIGEST.. |         40        8.02       79.56
7: DISEASES & DISORDERS OF THE HEPATO.. |         20        4.01       83.57
8: DISEASES & DISORDERS OF THE MUSCUL.. |         54       10.82       94.39
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.61      100.00
----------------------------------------+-----------------------------------
                                  Total |        499      100.00

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