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Table 5 Non-traumatic musculoskeletal disorder classification by decades of age

From: Epidemiological patterns of traumatic musculoskeletal injuries and non-traumatic disorders in Japan Self-Defense Forces

Age (y) 15–19 20–29 30–39 40–49 50–60 Total
  n % n % n % n % n % n %
Lumbar disorder 256 23.4 1115 26.8 1225 32.3 1370 27.7 582 24.2 4548 27.7
Tendon disorder 276 25.3 1098 26.4 824 21.7 1079 21.8 529 22.0 3806 23.2
Joint disorder 140 12.8 566 13.6 511 13.5 915 18.5 501 20.8 2633 16.1
Cervical disorder 10 0.9 157 3.8 404 10.6 614 12.4 261 10.9 1446 8.8
Periarthritis 42 3.8 176 4.2 189 5.0 400 8.1 252 10.5 1059 6.5
Ligament disorder 129 11.8 442 10.6 191 5.0 180 3.6 69 2.9 1011 6.2
Bone bruise 121 11.1 216 5.2 104 2.7 70 1.4 40 1.7 551 3.4
Nerve disorder 23 2.1 102 2.5 121 3.2 127 2.6 67 2.8 440 2.7
Fatigue fracture 54 4.9 93 2.2 40 1.1 42 0.8 11 0.5 240 1.5
Tumor 15 1.4 49 1.2 72 1.9 58 1.2 41 1.7 235 1.4
Other 27 2.5 140 3.4 108 2.9 97 2.0 54 2.2 426 2.6
Total 1093 100.0 4154 100.0 3789 99.9 4952 100.0 2353 100.1 16,395 100.0