Table 4.
Number of patients registered in the Danish National Patient Registry according to disease categories and patient contacts, 1977–2012a
| ICD-8 | ICD-10 | Disease categories | Inpatient contact, n (%) | Outpatient contact, n (%) | Emergency department contact, n (%) | Any patient contact, n (%) |
|---|---|---|---|---|---|---|
| All | All | All diseases | 7,268,857 (100) | 5,953,405 (100) | 5,097,300 (100) | 8,085,603 (100) |
| 0–139 | A00–B99 | Certain infectious and parasitic diseases | 801,471 (11.0) | 232,080 (3.9) | 104,089 (2.0) | 975,286 (12.1) |
| 140–239 | C00–D48 | Neoplasms | 1,308,247 (18.0) | 910,226 (15.3) | 18,619 (0.4) | 1,599,930 (19.8) |
| 280–289 | D50–D89 | Diseases of the blood and blood-forming organs | 351,455 (4.8) | 146,420 (2.5) | 13,779 (0.3) | 416,132 (5.1) |
| 240–279 | E00–E90 | Endocrine, nutritional, and metabolic diseases | 972,238 (13.4) | 653,091 (11.0) | 69,610 (1.4) | 1,232,964 (15.2) |
| 290–319 | F00–F99 | Mental and behavioral disorders | 575,514 (7.9) | 218,086 (3.7) | 137,711 (2.7) | 743,981 (9.2) |
| 320–359 | G00–G99 | Diseases of the nervous system | 514,425 (7.1) | 504,543 (8.5) | 90,232 (1.8) | 840,500 (10.4) |
| 360–379 | H00–H59 | Diseases of the eye and adnexa | 295,631 (4.1) | 738,413 (12.4) | 126,565 (2.5) | 997,947 (12.3) |
| 380–389 | H60–H95 | Diseases of the ear and mastoid process | 271,495 (3.7) | 547,612 (9.2) | 42,307 (0.8) | 750,109 (9.3) |
| 390–459 | I00–I99 | Diseases of the circulatory system | 1,971,447 (27.1) | 1,106,198 (18.6) | 311,333 (6.1) | 2,312,646 (28.6) |
| 460–519 | J00–J99 | Diseases of the respiratory system | 1,738,535 (23.9) | 713,021 (12.0) | 204,853 (4.0) | 2,018,882 (25.0) |
| 520–579 | K00–K93 | Diseases of the digestive system | 1,717,940 (23.6) | 1,116,975 (18.8) | 174,675 (3.4) | 2,229,186 (27.6) |
| 680–709 | L00–L99 | Diseases of the skin and subcutaneous tissue | 421,034 (5.8) | 434,280 (7.3) | 190,607 (3.7) | 824,052 (10.2) |
| 710–739 | M00–M99 | Musculoskeletal and connective tissue disease | 1,178,743 (16.2) | 1,747,207 (29.3) | 440,731 (8.6) | 2,387,728 (29.5) |
| 580–629 | N00–N99 | Diseases of the genitourinary system | 1,527,088 (21.0) | 1,132,468 (19.0) | 123,847 (2.4) | 2,066,692 (25.6) |
| 630–679 | O00–O99 | Pregnancy, childbirth, and the puerperium | 1,287,919 (17.7) | 429,432 (7.2) | 44,587 (0.9) | 1,321,981 (16.3) |
| 760–779 | P00–P96 | Conditions originating in the perinatal period | 468,787 (6.4) | 75,901 (1.3) | 1,867 (0.0) | 490,506 (6.1) |
| 740–759 | Q00–Q99 | Congenital malformations and deformations | 274,586 (3.8) | 235,560 (4.0) | 4,116 (0.1) | 412,386 (5.1) |
| 780–799 | R00–R99 | Symptoms, signs, and findings not classified elsewhere | 1,952,537 (26.9) | 1,214,203 (20.4) | 655,075 (12.9) | 2,784,868 (34.4) |
| 800–999 | S00–T98 | External causes of injury and poisoning | 2,184,899 (30.1) | 1,751,282 (29.4) | 4,252,799 (83.4) | 5,056,701 (62.5) |
| E00–E99 | X01–Y98 | External causes of morbidity and mortality | 669,066 (9.2) | 756 (0.0) | 27,230 (0.5) | 692,424 (8.6) |
| Y00–Y99 | Z00–Z99 | Factors influencing health and contact with health services | 4,162,984 (57.3) | 4,890,778 (82.2) | 1,894,891 (37.2) | 6,104,084 (75.5) |
Notes:
a
The disease categories are ordered according to the ICD-10. Both primary and secondary diagnoses were included. A person (ie, one Civil Personal Register number) can contribute in several diseases categories, but only once in each cell.
Abbreviation: ICD, International Classification of Diseases.