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Table 3 Sleeping problems and health status stated by the pilots from the two different ROS

From: Online survey among maritime pilots: job-related stress and strain and the effects on their work ability

  Total sample (n = 401) 1-week ROS (n = 49) 4-month ROS (n = 352) p
Sleeping disorders, n (%)
 No 128 (31.9%) 18 (36.7%) 110 (31.3%) 0.4402
 Yes 273 (68.1%) 31 (63.3%) 242 (68.7%)
Difficulty in falling asleep 42 (10.5%) 3 (6.1%) 39 (11.1%)  
Wake up at least once a night 172 (42.9%) 19 (38.8%) 153 (43.5%)  
Lie awake several times a night 59 (14.7%) 9 (19.4%) 50 (14.2%)  
Daytime sleepiness according to Epworth Sleepiness Scale
 Point value, (SD) 8.8 (4.0) 8.1 (3.8) 8.9 (4.0) 0.2071
 Point value > 11, n (%) 168 (41.9%) 16 (32.7%) 152 (43.2%) 0.1622
Most common current diseases or injuries (physician’s diagnosis), n (%)3
 Musculoskeletal disease in back, limbs or other part of the body 137 (34.2%) 20 (40.8%) 117 (33.2%) 0.2052
 Cardiovascular disease 101 (25.2%) 7 (14.3%) 94 (26.7%) 0.0982
 Injury due to an accident 73 (18.2%) 9 (18.4%) 64 (18.2%) 0.2802
 Endocrine or metabolic disease 43 (10.7%) 4 (8.2%) 39 (11.1%) 0.4192
 Neurological or sensory disease 42 (10.5%) 0 42 (11.9%) 0.0382
 Mental disorder 22 (5.5%) 1 (2.0%) 21 (6.0%) 0.0792
Work impairment due to these diseases (subjective assessment), n (%)3 0.7122
 No hindrance/ no diseases 267 (66.6%) 29 (59.2%) 238 (67.6%)  
 Ability to do the job, but it causes some symptoms 109 (27.2%) 17 (34.7%) 92 (26.0%)  
Sometimes slow down the work pace or change the work methods 18 (4.5%) 3 (6.1%) 15 (4.3%)  
Often slow down the work pace or change the work methods 3 (0.7%) 0 3 (0.9%)  
 Feel able to do only part-time work 1 (0.3%) 0 1 (0.3%)  
 Entirely unable to work 3 (0.7%) 0 3 (0.9%)  
  1. 1Student’s T test
  2. 2Chi-square test
  3. 3according to WAI