Table 6. Comparison of the Incidence of Short-Stay Hospital Discharges for Selected Diagnostic Groups, as Reported by the NHDS and Medicare, for Persons Age 65 and Over, U.S., 1972 and 1976.

Diagnostic Group and ICDA-8 Code	1972			1976
	Number of Discharges (in Thousands)		Percent Difference	Number of Discharges (in Thousands)		Percent Difference
	NHDS1	Medicare	$\frac{\text{Medicare}‒\text{NHDS}}{\text{NHDS}}\times 100$	NHDS1	Medicare	$\frac{\text{Medicare}‒\text{NHDS}}{\text{NHDS}}\times 100$
All Diagnoses2	6,634	6,320	−4.7	7,912	7,486	−5.4
Diagnoses Listed Below:	3,788	3,610	−4.7	4,368	3,802	−13.0
Malignant Neoplasms, 140-209	585	545	−6.8	753	639	−15.1
Large Intestine and Rectum, 153, 154, 197.5	78	80	2.6	107	97	−9.3
Thoracic Organs, 162, 163, 197.0-197.3	71	63	−11.3	99	85	−14.1
Breast, 174	51	51	0.0	71	58	−18.3
Prostate, 185	61	62	1.6	71	71	0.0
Lymphatic and Hematopoietic Tissues, 196, 200-209	62	53	−14.5	76	62	−18.4
Other and Unspecified Sites, Residual	262	236	−9.9	329	266	−19.1
Diabetes Mellitus, 250	188	171	−9.0	204	174	−14.7
Cataract, 374	179	196	9.5	228	233	2.2
Ischemic Heart Disease, 410-414	887	923	4.1	1,022	921	−9.9
Acute Myocardial Infarction, 410	186	187	0.5	202	188	−6.9
Chronic Ischemic Heart Disease, 412	630	677	7.5	711	660	−7.2
Other Ischemic Disease, 411, 413-414	71	59	−16.9	109	73	−33.0
Congestive Heart Failure, 427.0	146	98	−32.9	195	135	−30.8
Cerebrovascular Disease, 430-438	413	412	−0.2	452	442	−2.2
Arteriosclerosis, 440	98	54	−44.9	70	45	−35.7
Pneumonia, All Forms, 480-486	205	192	−6.3	255	196	−23.1
Ulcer of Stomach, Duodenum, Peptic Ulcer of Unspecified Site and Gastrojejunal Ulcer, 531-534	108	99	−8.3	109	88	−19.3
Inguinal Hernia, 550, 552	96	89	−7.3	99	88	−11.1
Diverticula of Intestine, 562	99	101	2.0	116	98	−15.5
Cholelithiasis, Cholecystitis and Cholangitis, 574, 575	164	141	−14.0	155	132	−14.8
Hyperplasia of Prostate, 600	149	150	0.7	163	145	−11.0
Arthritis and Rheumatism, Except Rheumatic Fever, 710-718	156	137	−12.2	194	153	−21.1
Fracture of Neck of Femur, 820	122	125	2.5	148	133	−10.1
Other Fractures, 800-819, 821-829	193	177	−8.3	205	180	−12.2

¹NHDS “First Listed” rather than “All Listed” diagnoses were used for comparison because Medicare codes only one diagnosis per discharge.

²Includes diagnoses not listed in this table and Medicare discharges with an “unknown” diagnosis.