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Table 1 Distribution of study population characteristics

From: Risk assessment of manual handling operations at work with the key indicator method (KIM-MHO) — determination of criterion validity regarding the prevalence of musculoskeletal symptoms and clinical conditions within a cross-sectional study

Parameter* Risk category 1 (Reference)
Employees in jobs with low MHO, < 10 points KIM-MHO
Risk category 2
Employees in jobs with MHO, 10 – 24 points KIM-MHO
Risk category 3
Employees in jobs with MHO, 25 – 49 points KIM-MHO
Risk category 4
Employees in jobs with MHO, ≥ 50 points KIM-MHO
All employees
Women N = 306 N = 75 N = 59 N = 73 N = 513
 age [years] 38.7 (10.1) 37.7 (8.9) 42.2 (9.1) 44.8 (9.9) 39.9 (10.0)
 body height [cm] 167.6 (6.3) 169.2 (6.8) 164.7 (6.0) 164.7 (5.5) 167.1 (6.4)
 body mass index 23.7 (3.6) 23.9 (4.3) 25.6 (4.7) 26.2 (4.9) 24.3 (4.2)
 working hours per week [hours] 38.7 (6.6) 36.7 (5.6) 34.9 (3.1) 36.7 (3.1) 37.7 (5.9)
Men N = 498 N = 173 N = 23 N = 239 N = 933
 age [years] 41.5 (9.0) 38.5 (9.4) 39.7 (11.2) 36.6 (8.5) 39.7 (9.2)
 body height [cm] 181.1 (6.8) 181.0 (6.9) 178.6 (6.3) 178.4 (6.8) 180.3 (6.9)
 body mass index 26.1 (3.2) 26.2 (3.6) 25.5 (2.9) 26.8 (4.1) 26.3 (3.6)
 working hours per week [hours] 43.3 (6.3) 40.0 (5.2) 38.5 (2.4) 37.7 (2.3) 41.1 (5.8)
  1. *Distribution of different study characteristics by exposure to manual handling operations (MHO) according to KIM-MHO risk categories. Mean and standard deviation