RT Journal Article SR Electronic T1 Associations of objectively measured forward bending at work with low-back pain intensity: a 2-year follow-up of construction and healthcare workers JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 660 OP 667 DO 10.1136/oemed-2019-105861 VO 76 IS 9 A1 Lunde, Lars-Kristian A1 Koch, Markus A1 Merkus, Suzanne Lerato A1 Knardahl, Stein A1 Wærsted, Morten A1 Veiersted, Kaj Bo YR 2019 UL http://oem.bmj.com/content/76/9/660.abstract AB Objectives This study aimed to determine possible associations between objectively measured forward bending at work (FBW) and low-back pain intensity (LBPi) among Norwegian construction and healthcare workers.Methods One-hundred and twenty-five workers wore two accelerometers for 3–4 consecutive days, during work and leisure to establish duration of ≥30° and ≥60° forward bending. The participating workers reported LBPi (0–3) at the time of objective measurements and after 6, 12, 18 and 24 months. We investigated associations using linear mixed models with significance level p≤0.05 and presented results per 100 min.Results The duration of ≥30° and ≥60° FBW was not associated with average LBPi during follow-up, neither for the total sample nor stratified on work sector. Furthermore, analyses on all workers and on construction workers only found no significant association between ≥30° or ≥60° FBW and change in LBPi over the 2-year follow-up. For healthcare workers we found a consistent significant association between the duration of ≥30° FBW at baseline and the change in LBPi during follow-up, but this was not found for ≥60° FBW.Conclusions This study suggests that objectively measured duration of FBW in minutes is not associated with average levels of, or change in LBPi in construction workers over a 2-year period. In healthcare workers, exposure to ≥30° FBW was associated with change in LBPi, while we did not find this for ≥60° FBW. Results may indicate that the associations between FWB and LBP vary depending on type of work tasks, gender or sector-specific factors.