Table 3.

Assignment of each variable

Variable	Assignment
Dependent variables
Occurrence of OLBP	1 = “OLBP”, 0 = “No OLBP”
Independent variables
BMI	Actual value entered
Years of employment	1 = “>5 years”, 0 = “≤5 years”
Position	1 = “nursing”, 0 = “medical or medical technology”
Frequency of night shift	1 = “>4 times/month”, 0 = “≤4 times/month”
Standing hours at work	1 = “>5 h/d”, 0 = “≤5 h/d”
Training in low back protection	1 = “No”, 0 = “Yes”