Table 4 Associations between baseline workplace sitting in 2012 and complaint of upper back and the lower back in the last 12 months in 2017 (yes/no) stratified by sex to baseline among 2,082 employees aged 31–60 years in Germany. Poisson regressions. Prevalence Ratios (PR).

Model 3

Under 5 h/week

1

(Ref)

1

(Ref)

1

(Ref)

1

(Ref)

5 to < 15 h/week

1.20

0.88–1.63

1.07

0.85–1.35

1.04

0.89–1.21

1.01

0.87–1.18

15 to < 25 h/week

1.15

0.79–1.66

1.25

0.99–1.59

1.13

0.95–1.34

1.13

0.97–1.32

25 to < 35 h/week

1.20

0.81–1.77

1.05

0.79–1.40

1.03

0.84–1.26

1.15

0.96–1.38

35 or more hours/week

1.08

0.74–1.59

0.75

0.52–1.07

1.00

0.83–1.21

1.03

0.84–1.27