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Table 1 Baseline characteristics of two arrivals of 955 male conscripts.

From: Musculoskeletal disorders in physically active conscripts: a one-year follow-up study in the Finnish Defence Forces

Variable 1st arrival (N = 359)   2nd arrival (N = 596)   Missing (total number) P-value1
Age2 (range yrs) 20 (18–28)   19 (18–27)   3 (0%) < 0.001
BMI3 (range, kg/m2) 23.7 (15.1–45.9)   23.8 (16.4–39.4)   88 (9%) 0.70
  Yes No Yes No   
High level of education4 151 (42%) 201 (56%) 239 (40%) 351 (59%) 13 (1%) 0.47 8
High level of previous physical activity5 114 (32%) 238 (66%) 177 (30%) 412 (69%) 14 (1%) 0.45 8
Good self-assessed health6 194 (54%) 158 (44%) 308 (52%) 282 (47%) 13 (1%) 0.39 8
Clear musculoskeletal symptoms7 100 (28%) 251 (70%) 174 (29%) 416 (70%) 14 (1%) 0.74 8
  1. 1 P-value for difference between the arrivals
  2. 2 P-value was examined by using Mann-Whitney U test for median difference
  3. 3 Body mass index, P-value was examined by using Independent t test for mean difference
  4. 4 Graduated or studies in higher education institution
  5. 5 Sweating exercise at least three times per week during the last month before entry to military
  6. 6 Compared to age-mates
  7. 7 Symptoms lasting more than 7 days at least in one anatomical region during the last month before entry to military
  8. 8 P-value was examined by using χ2 statistics for difference