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Table 1 Comparison of baseline demographics of patients between traumatic musculoskeletal injury and non-traumatic disorder

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

  Traumatic injuries Non-traumatic disorders
Total No. 10,442 16,395
Average age (y) 33.7 15–60 y 36.4 15-60y
Age distribution 15–19 y 573 5.5% 1093 6.7%
20–29 y 3646 34.9% 4154 25.3%
30–39 y 2864 27.4% 3789 23.1%
40–49 y 2452 23.5% 4952 30.2%
50–60 y 907 8.7% 2394 14.6%
non-responder    13 0.0%
Sex male 9701 93.2% 15,138 92.6%
female 660 6.3% 1140 7.0%
non-responder 81 0.8% 117 0.7%
Alcohol habit drink everyday 2132 21.0% 3363 20.5%
drink sometimes 6290 60.2% 9850 60.1%
non-drinker 1472 14.5% 2314 14.1%
non-responder 548 5.2% 868 5.3%
Smoking habit smoker 3974 38.1% 6289 38.4%
non-smoker 6138 58.8% 9564 58.3%
non-responder 330 3.2% 542 3.3%
Uniformed service Ground Force 6752 64.7% 11,066 67.5%
Maritime Force 2593 24.8% 3988 24.3%
Air Force 528 5.1% 967 5.9%
non-responder 569 5.4% 374 2.3%
Rank Officer 1603 15.4% 3418 20.8%
Enlisted 5829 55.8% 8941 54.5%
Soldier 2194 21.0% 3313 20.2%
Cadet 572 5.5% 374 2.3%
non-responder 244 2.3% 349 2.1%