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Table 1 Baseline characteristics of 1411 male conscripts by company

From: Risk factors of acute and overuse musculoskeletal injuries among young conscripts: a population-based cohort study

Variable Anti-tank Signal Mortar Engineer Missing P-value1
Number of conscripts 263 540 363 245 0 (0%) -
Age, median, years 19 19 19 19 0 (0%) 0.422 2
Body mass index, median, kg/m2 23.4 22.6 23.3 23.6 139 (10%) 0.003 2
Waist circumference, median, cm 87.0 84.9 85.6 87.0 101 (7%) 0.001 2
12-minute run test result, median, m 2310 2308 2500 2400 42 (3%) <0.001 2
Conscript’s physical fitness index (CPFI)4, median, points 15.05 14.75 17.00 15.50 46 (3%) <0.001 2
Hometown population ≥ 10,000 persons,% 59% 66% 59% 57% 24 (2%) 0.044 3
High level of education5,% 48% 38% 49% 35% 22 (2%) <0.001 3
High level of previous physical activity6,% 31% 24% 42% 36% 23 (2%) <0.001 3
Good self-assessed health7,% 57% 47% 61% 51% 22 (2%) <0.001 3
Chronic impairment or disability,% 17% 15% 16% 17% 27 (2%) 0.802 3
Clear musculoskeletal symptoms8,% 28% 32% 26% 27% 23 (2%) 0.339 3
Previous or current regular smoker, % 43% 47% 44% 57% 26 (2%) 0.004 3
Use of alcohol ≥ 3 times per week, % 16% 19% 15% 20% 23 (2%) 0.318 3
  1. 1P-value for difference between the companies.
  2. 2P-value was calculated using a Kruskal-Wallis test for median difference.
  3. 3P-value was calculated using χ2 statistics for difference.
  4. 4CPFI = (12-min running test result (metres) + 100 × muscle fitness test points) / 200, [Excellent (CPFI ≥ 21.00), Good (17.00 ≤ CPFI < 21.00), Fair good (13.00 ≤ CPFI < 17.00), Poor (CPFI < 13.00)].
  5. 5Graduated or studies in higher education institution.
  6. 6Sweating exercise at least three times per week during the last month before entering the military.
  7. 7Compared to age-mates.
  8. 8Symptoms lasting more than 7 days in at least one anatomical region during the last month before entering the military.