Table 3

Association between per cent sitting time at work and trajectories of neck–shoulder pain (scale 0–10), stratified by occupational sector in the Danish PHysical ACTivity cohort with Objective measurements (DPHACTO) study population

Cleaning (n=120)Manufacturing (n=448)Transportation (n=57)
95% CI95% CI95% CI
Estimatep ValueLowerUpperEstimatep ValueLowerUpperEstimatep ValueLowerUpper
Model 1 (n=625)
 Intercept3.0400.0002.0234.0582.7620.0002.3513.1731.5830.174−0.7123.878
 Time−0.0230.436−0.0810.035−0.0240.039−0.048−0.0010.1570.0380.0090.305
 Sitting0.0210.294−0.0180.0600.0050.383−0.0060.0170.0140.464−0.0230.051
 Interaction (sitting×time)−0.0010.363−0.0030.0010.0000.270−0.0010.000−0.0040.003−0.006−0.001
Model 2 (n=610)
 Intercept2.5360.131−0.7645.8360.6510.441−1.0102.3130.8770.687−3.4575.212
 Time−0.0240.417−0.0820.034−0.0230.055−0.0470.0000.1570.0380.0090.305
 Sitting0.0110.595−0.0300.0530.0050.368−0.0060.0170.0170.393−0.0230.058
 Interaction (sitting×time)−0.0010.389−0.0030.0010.0000.272−0.0010.000−0.0040.003−0.006−0.001
Model 3 (n=595)
 Intercept3.9400.091−0.6438.5233.0200.0060.8675.1744.8590.197−2.59612.314
 Time−0.0230.431−0.0810.035−0.0240.045−0.048−0.0010.1560.0440.0040.309
 Sitting0.0190.407−0.0260.0640.0070.296−0.0070.0210.0090.841−0.0770.094
 Interaction (sitting×time)−0.0010.394−0.0030.0010.0000.351−0.0010.000−0.0040.004−0.006−0.001
  • Significant (p<0.05) estimates are boldfaced.

  • Model 1: unadjusted.

  • Model 2: adjusted for gender, age and body mass index.

  • Model 3: adjusted for the covariates in model 2 and lifting/carrying time at work, sitting time at leisure, physical activity at work and leisure, upper arm elevation >60° at work.