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Table 7 Within-subject changes over time (self-reported measures T1, T2, T3)

From: Intelligent Physical Exercise Training (IPET) in the offshore wind industry: a feasibility study with an adjusted conceptual model

Variable Mean (SD) Difference [95% CI]
T1 T2 T3 T1-T2 Δ T2-T3 Δ T1-T3 Δ
Musculoskeletal disorders (number) 3.1 (2.1) 3.7 (1.7) 2.8 (1.7) 0.6 [−0.2 to 1.3] −0.9 [−0.1 to −1.6] −0.3 [−1.2 to 0.6]
Musculoskeletal disorders (severity) 3.6 (2.3) 3.7 (2.1) 3.8 (2.1) 0.1 [−0.6 to 0.9] 0.1 [−0.6 to 0.9] 0.2 [−0.6 to 1]
Work ability (0−10) 8.9 (0.8) 8.7 (0.9) 8.9 (1.1) −0.2 [−0.6 to 0.2] 0.2 [−0.2 to 0.6] 0 [−0.5 to 0.5]
Productivity (0−10) 8.4 (1.5) 8.5 (0.9) - 0.1 [−0.6 to 0.5] - -
Physical capacities (1−10)
 Cardiorespiratory fitness 5.5 (1.8) 5.7 (1.9) - 0.2 [−0.4 to 0.9] - -
 Muscle strength 6.4 (1.8) 6.6 (1.5) - 0.2 [−0.4 to 0.8] - -
 Endurance 6.3 (2.1) 6.7 (1.5) - 0.3 [−0.2 to 1] - -
 Flexibility 5.7 (2.2) 6.1 (1.9) - 0.4 [−0.3 to 1.2] - -
 Balance 6.3 (2.1) 6.6 (1.9) - 0.3 [−0.3 to 0.9] - -
  1. N= 20. All WTs responded to a minimum of two out of three surveys. Four WTs had one timepoint without responses and were excluded from the analysis. The survey at T3 only included questions on musculoskeletal disorders and work ability. Musculoskeletal disorders (number) refer to 3-month prevalence (3-month recall period) of any symptoms in up to nine body parts (present > 0 days and with an average severity of ≥ 1 (NRS = numerical rating scale 0–10). Musculoskeletal disorders (severity) reflect the average severity (0–10) of all cases combined