Table 1 Demographic and clinical characteristics of conscripts before entry into the military service stratified by knee symptoms during military service
From: Incidence and risk factors of exercise-related knee disorders in young adult men
Characteristic | Knee symptoms during military service | ||
|---|---|---|---|
Yes N = 853 | No N = 3176 | P-value | |
Age at military service, year, mean (SD) | 19.2 (1.0) | 19.3 (1.2) | 0.094 |
Military Service Class A, n (%) | 811(95.1) | 2915 (91.8) | <0.001 |
BMI, mean (SD) | 23.1 (3.7) | 23.3 (3.8) | 0.26 |
Smoking (cigarettes/day), n (%) | 0.004 | ||
0 | 458 (62.6) | 1834 (37.4) | |
1–9 | 62 (8.5) | 263 (9.7) | |
10–19 | 150 (20.5) | 474 (17.4) | |
≥ 20 | 61 (8.3) | 151 (5.5) | |
Comprehensive school only, n (%) | 499 (58.6) | 1846 (58.5) | 0.96 |
High physical activity, n (%) | 283 (38.8) | 1025 (37.6) | 0.56 |
Diseases and injuries detected by military physicians, n (%) | |||
Mental or behavioral disorders | 9 (1.1) | 169 (5.3) | <0.001 |
Diseases of the eye and adnexa | 219 (25.7) | 883 (27.8) | 0.22 |
Diseases of the respiratory system | 142 (16.6) | 450 (14.2) | 0.069 |
Diseases of the skin and subcutaneous tissue | 46 (5.4) | 184 (5.8) | 0.65 |
Diseases of the musculoskeletal system | 84 (9.8) | 264 (8.3) | 0.16 |
Injuries | 103 (12.1) | 315 (9.9) | 0.067 |
Flatfoot deformity, n (%) | 14 (1.6) | 78 (2.5) | 0.16 |
Subjective symptoms reported in official questionnaire before entering military service, n (%) | |||
Symptoms of the musculoskeletal system | 93 (10.9) | 261 (8.2) | 0.014 |
Symptoms of the respiratory system | 195 (22.9) | 646 (20.3) | 0.11 |
Symptoms of the gastrointestinal system | 25 (2.9) | 63 (2.0) | 0.093 |
Mental symptoms | 24 (2.8) | 117 (3.7) | 0.22 |