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Table 1 Baseline characteristics of 1,912 male conscripts by company and study period

From: Neuromuscular training with injury prevention counselling to decrease the risk of acute musculoskeletal injury in young men during military service: a population-based, randomised study

Variable Prestudy period Study period intervention groups Study period control group Missing data Pvaluea
  Anti-tank company Engineer company Signal company Mortar company Anti-tank company Engineer company Signal company Mortar company   
Number of conscripts 263 245 282 154 222 279 258 209 0 (0%) -
Median age, yr 19 19 19 19 19 19 19 19 0 (0%) 0.054b
Median body mass index, kg/m2 23.4 23.6 22.5 22.7 23.6 23.3 22.8 23.7 175 (9%) 0.011b
Median waist circumference, cm 87.0 87.0 85.0 84.5 85.0 86.0 84.0 86.1 139 (7%) 0.005b
Median 12-minute running test result, m 2,310 2,400 2,340 2,515 2,350 2,420 2,300 2,470 51 (3%) 0.614b
Median muscle fitness indexd, points 7 7 7 8 7 6 6 10 37 (2%) 0.019b
Median conscript physical fitness index (CPFI)e, points 15.05 15.50 15.03 16.75 15.75 15.25 14.60 17.05 58 (3%) 0.153b
Conscript's hometown population ≥10,000, % 59 57 64 54 66 57 68 63 25 (1%) 0.100c
High level of preceding physical activityf, % 31 36 26 32 24 26 21 49 24 (1%) 0.011c
Good self-assessed healthg, % 57 51 54 50 54 53 41 70 23 (1%) 0.942c
Chronic impairment or disability, % 17 17 11 17 11 18 19 16 30 (2%) 0.277c
Past orthopaedic surgery, % 8 9 7 9 9 10 11 7 25 (1%) 0.802c
No musculoskeletal symptomsh, % 28 27 32 28 34 34 31 25 25 (1%) 0.143c
Previous or current regular smoker, % 43 57 47 40 53 58 47 46 27 (1%) 0.003c
Use of alcohol at least three times per week, % 16 20 15 16 24 23 23 14 24 (1%) 0.010c
  1. a P value for difference between the study group and study year; b P value was calculated by using a Kruskal-Wallis test for median difference; c P value was calculated by using χ2 statistics for significant differences; dMuscle fitness index is the sum of individual muscle fitness test results comprising pushups, situps, pullups, the standing long jump and the back-lift test (excellent = 13 to 15 points, good = 9 to 12 points, fair to good = 5 to 8 points, and poor = 0 to 4 points); eCPFI = (12-minute running test result (measured in meters) + 100 × muscle fitness index) ÷ 200; scoring was excellent = CPFI ≥21.00), good = 17.00 ≤ CPFI < 21.00, fair to good = 13.00 ≤ CPFI < 17.00, and poor = CPFI < 13.00; fsweating exercise at least three times per week during the past month before entry into the military; gcompared to age cohort; hsymptoms lasting more than 7 days in at least one anatomical region during the past month before entering the military.