“…The self-administered questionnaire included LBP, workaholism, work engagement, and psychosocial factors (job stress, 27,28 depression, 28,29 and sleep problems 30 ) that have been associated with LBP in previous studies. In the basic information, we also included the following items that have been associated with LBP in previous studies: sex, 31 age, 31 smoking, 32 exercise habits, 33 analgesics, 34 occupation, 35 night shift, 30 job position, 36 and lifting. 27,32,37 Physical function measures include muscle mass, 38,39 body fat percentage, 28,32 and muscle strength, 40 which have been associated with LBP in previous studies.…”