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Table 1 The distribution of total number of sick days, sick-leave periods, and days/sick-leave period in 1985–1996 according to different ICD-8 chapters in a cohort of young adults initially sick-listed ≥ 28 days due to back, neck, or shoulder diagnoses

From: The panorama of future sick-leave diagnoses among young adults initially long-term sickness absent due to neck, shoulder, or back diagnoses. An 11-year prospective cohort study

ICD-8 Sick days Sick-leave periods Days/sick-leave period (95% CI)
Chapter Code listing n % n % n 95% CI
I Infectious and parasitic diseases 3,987 2.25 789 10.02 5.05 (4.64–5.47)
II Neoplasms 1,413 0.80 27 0.34 52.33 (29.60–75.08)
III Endocrine, nutritional, and metabolic diseases 1,423 0.80 39 0.50 36.49 (12.69–60.28)
IV Diseases of blood and blood-forming organs 17 0.01 1 0.01 17.00 -
V Mental disorders 16,754 9.47 357 4.53 46.93 (38.69–55.17)
VI Disease of the nervous system and sense organs 3,105 1.76 150 1.90 20.70 (7.75–33.65)
VII Diseases of the circulatory system 995 0.56 48 0.61 20.73 (16.03–25.43)
VIII Diseases of the respiratory system 7,810 4.42 1296 16.45 6.03 (5.56–6.49)
IX Diseases of gastrointestinal system 3,075 1.74 171 2.17 17.98 (11.71–24.26)
X Diseases of genitourinary system 1,545 0.87 194 2.46 7.96 (6.93–9.00)
XI Complications of pregnancy, childbirth, and the puerperium 3,235 1.83 174 2.21 18.59 (15.73–21.46)
XII Diseases of the skin and subcutaneous tissue 2,166 1.22 59 0.75 36.71 (8.15–65.27)
XIII Diseases of the musculoskeletal system and connective tissue 117,139 66.25 3155 40.05 37.13 (34.39–39.86)
XIV Congenital anomalies 39 0.02 3 0.04 13.00 (-6.72–32.72)
XV Certain conditions originating in the perinatal period - - - - - -
XVI Symptoms, signs, and ill-defined conditions 5,953 3.37 1022 12.97 5.82 (4.60–7.05)
XVII Injury, poisoning, and certain other consequences of external causes 7,956 4.50 364 4.62 21.86 (18.14–25.57)
XVIII Factors influencing health status and other contacts with health services 213 0.12 29 0.37 7.34 (3.12–11.57)
Total   176,825 100 7878 100 22.45 (21.16–23.73)
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