Skip to main content

Table 2 Comparison of the metabolic equivalent and the activity classification for all workplaces and tasks

From: Concurrent and discriminant validity of ActiGraph waist and wrist cut-points to measure sedentary behaviour, activity level, and posture in office work

Tasks

 

Workplaces

Task Effects

ConvChair

ActiveChair

Standing

Overall

Overall

vs. Keyboard

vs. Deskwork

vs. Sorting

Mouse

MET value

1.19 [1.11–1.24]

1.33 [1.25–1.45]

1.18 [1.09–1.28]

1.23 [1.18–1.35]

 

0.002 (0.42)

0.000 (0.69)

0.000 (0.87)

Activity classification

96.7

73.3

100.0

90.0

 

0.132

0.000

0.000

Keyboard

MET value

1.34 [1.15–1.38]

1.40 [1.33–1.50]

1.28 [1.20–1.32]

1.30 [1.24–1.37]

 

–

0.000 (0.40)

0.000 (0.87)

Activity classification

93.3

70.0

90.0

84.4

 

–

0.000

0.000

Deskwork

MET value

1.26 [1.20–1.41]

1.52 [1.34–1.60]

1.33 [1.26–1.43]

1.36 [1.28–1.51]

  

–

0.000 (0.86)

Activity classification

76.7

43.3

76.7

65.6

  

–

0.000

Sorting

MET value

1.72 [1.65–1.95]

1.87 [1.71–2.08]

1.75 [1.67–1.92]

1.80 [1.69–1.89]

   

–

Activity classification

16.7

6.7

16.7

13.3

   

–

Overall

MET value

1.39 [1.29–1.47]

1.53 [1.39–1.71]

1.36 [1.34–1.48]

1.43 [1.36–1.53]

0.000

   

Activity Classification

70.8

48.3

70.8

63.3

0.000

   
  

Workplace Effects

       

Overall

MET value

   

0.000

    

Activity classification

   

0.000

    

vs. ActiveChair

MET value

0.000 (0.69)

–

      

Activity classification

0.000

–

      

vs. Standing

MET value

1.000

0.000 (0.66)

–

     

Activity classification

1.000

0.000

–

     
  1. MET value as median with 95% confidence interval, activity classification as % of subjects with MET ≤1.5 (equal to minimum-intensity physical activity classification). Significant p-values marked in bold, effect size given in brackets for significant MET effects (task effects on the right side of the table, workplace effects on the lower side of the table)
  2. The Generalized Estimation Equations used the exchangeable working correlation structure and the robust covariance matrix. A goodness of fit of 38.0 (MET value, linear response) and 306.8 (activity classification, binary logistic response) was observed (QICC value). Abbreviations: Conventional chair (ConvChair), activity-promoting chair (Active Chair), metabolic equivalent (MET)