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Table 2 Relationships between work factors and NPS (exposure at baseline and outcome at follow-up), work factors and difficulties initiating sleep (exposure at baseline and mediator at follow-up), and difficulties initiating sleep and NPS (mediator at baseline and outcome at follow-up) (N = 6277)

From: Effects of psychosocial work factors on number of pain sites: The role of sleep quality as mediator

Psychosocial work factor

Work factor → Sleep quality

Work factor → Pain sites

Sleep quality → Pain sites

Indirect effect

Quantitative job demands

0.041[0.002,0.084]

SE = 0.022

0.031*[0.066,0.120]

SE = 0.023

0.092*[0.066,0.120]

SE = 0.014

0.004[0.000,0.008]

SE = 0.002

Decision demands

0.040[-0.002,0.084]

SE = 0.022

0.011[-0.056,0.031]

SE = 0.022

0.094*[0.067,0.120]

SE = 0.014

0.004[-0.000,0.009]

SE = 0.002

Positive challenges at work

-0.073*[-0.132,-0.015]

SE = 0.029

0.043[-0.103,0.015]

SE = 0.030

0.091*[0.065,0.119]

SE = 0.014

-0.007*[-0.014,-0.002]

SE = 0.003

Role clarity

0.037[-0.081,0.006]

SE = 0.022

-0.053*[-0.096,-0.010]

SE = 0.022

0.090*[0.064,0.118]

SE = 0.014

0.003[-0.008,0.000]

SE = 0.002

Role conflict

0.128*[0.076,0.180]

SE = 0.027

0.117*[0.062,0.171]

SE = 0.027

0.084*[0.058,0.113]

SE = 0.014

0.011*[0.006,0.018]

SE = 0.003

Decision control

-0.101*[-0.158,-0.034]

SE = 0.032

-0.078*[-0.147,-0.010]

SE = 0.035

0.090*[0.065,0.117]

SE = 0.014

-0.009*[-0.016,-0.004]

SE = 0.003

Control over work pacing

-0.049[-0.096,0.004]

SE = 0.026

-0.005[-0.057,0.048]

SE = 0.027

0.093*[0.067,0.116]

SE = 0.014

-0.005[-0.010,-0.000]

SE = 0.003

Predictability during the next month

-0.044[-0.104,0.007]

SE = 0.029

-0.102*[-0.163,-0.047]

SE = 0.030

0.090*[0.064,0.117]

SE = 0.014

-0.004[-0.010,0.000]

SE = 0.003

Support from superior

-0.052*[-0.084,-0.019]

SE = 0.016

-0.058*[-0.090,-0.023]

SE = 0.016

0.086*[0.059,0.114]

SE = 0.014

-0.004*[-0.008,-0.002]

SE = 0.002

Coworker support

-0.053*[-0.104,-0.011]

SE = 0.024

-0.059*[-0.107,-0.001]

SE = 0.027

0.090*[0.063,0.117]

SE = 0.014

-0.005*[-0.011,-0.001]

SE = 0.002

Empowering leadership

-0.033*[-0.063,-0.005]

SE = 0.015

-0.030*[-0.060,-0.002]

SE = 0.015

0.090*[0.065,0.118]

SE = 0.014

-0.003*[-0.007,-0.001]

SE = 0.001

Fair leadership

0.027[-0.062,0.006]

SE = 0.017

-0.060*[-0.099,-0.026]

SE = 0.018

0.088*[0.062,0.116]

SE = 0.014

-0.002[-0.006,0.000]

SE = 0.002

Social climate

-0.049*[-0.095,-0.004]

SE = 0.023

-0.083*[-0.132,-0.038]

SE = 0.024

0.086*[0.059,0.114]

SE = 0.014

-0.004*[-0.009,-0.001]

SE = 0.002

  1. All regressions were adjusted for age, sex, skill level, and baseline levels of outcome. Values reflect Beta-estimates and confidence intervals reported are bias corrected (BCa CI)
  2. * Significant at P < 0.05