Hard Physical Work Intensifies the Occupational Consequence of Physician-Diagnosed Back Disorder: Prospective Cohort Study with Register Follow-Up among 10,000 Workers
Table 2
The prospective associations between back pain intensity, physical activity at work, and risk of LTSA.
N
%
Model 1
Model 2
Model 3
Model 4
HR (95% CI)
HR (95% CI)
HR (95% CI)
HR (95% CI)
Pain 0–2, light work
4272
46.9
1.00
1.00
1.00
1.00
Pain 3-4, light work
1244
13.7
1.33 (1.04–1.70)
1.36 (1.05–1.76)
1.33 (1.03–1.72)
1.30 (1.00–1.68)
Pain 5–9, light work
1035
11.4
2.15 (1.72–2.68)
2.06 (1.63–2.61)
1.90 (1.49–2.42)
1.74 (1.36–2.22)
Pain 0–2, hard work
1210
13.3
1.38 (1.07–1.78)
1.46 (1.12–1.91)
1.40 (1.07–1.83)
1.42 (1.08–1.86)
Pain 3-4, hard work
630
6.9
1.72 (1.28–2.30)
1.71 (1.25–2.33)
1.61 (1.18–2.20)
1.60 (1.17–2.18)
Pain 5–9, hard work
716
7.9
2.74 (2.16–3.48)
2.71 (2.09–3.50)
2.44 (1.87–3.17)
2.20 (1.68–2.87)
Model 1: adjusted for age and gender. Model 2: model 1 + psychosocial work environment (influence at work, emotional demands, support from colleagues, and support from leader). Model 3: model 2 + lifestyle (smoking, leisure physical activity, and BMI). Model 4: model 3 + depression and mental health.
