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. Author manuscript; available in PMC: 2021 Dec 14.
Published in final edited form as: Appl Ergon. 2020 May 8;87:103139. doi: 10.1016/j.apergo.2020.103139
Annual Low Back Symptom Frequency > 0 Measured whether there was any employee-reported low back pain [every day for a week (7 days) or more) in the past 12 months] on the modified Nordic assessment survey modules.