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Table 4 12-month mean changes in activity outcomes, and differences between interventions, adjusting for confounders

From: Evaluating the effectiveness of organisational-level strategies with or without an activity tracker to reduce office workers’ sitting time: a cluster-randomised trial

 

Group ORG (n = 87)a

Group ORG + Tracker (n = 66)a

Between group differencea b(Group ORG + Tracker vs. Group ORG)

Outcome

Adjusted mean change (95 % CI)

Adjusted mean change (95 % CI)

Adjusted mean difference (95 % CI)

Work hours

 Sitting, min/10 h

−40.5 min (-60.9, −20.0), p< 0.001

−35.5 min (-60.9, −10.2), p= 0.006

+4.4 min (−33.1, 41.9), p = 0.818

 Prolonged sitting, min/10 h

−41.3 min (−67.9, −14.8), p= 0.002

−45.7 min (−84.0, −7.4), p= 0.019

−1.4 min (−51.2, 48.3), p = 0.955

 Time between sitting bouts

+1.7 min (0.3, 3.1), p= 0.019

+1.5 min (−0.4, 3.3), p = 0.114

+0.3 min (−3.0, 3.6), p = 0.855

 Standing, min/10 h

+39.2 min (20.9, 57.5), p< 0.001

+27.4 min (7.7, 47.1), p= 0.007

−12.4 min (−44.6, 19.8), p = 0.449

 Stepping, min/10 h

+2.4 min (−3.0, 7.9), p = 0.375

+9.1 min (0.2, 17.9), p= 0.045

+7.7 min (−3.8, 19.2), p = 0.189

 Number of steps/10 h

+123.2 steps (−135.9, 382.4), p = 0.350

+433.8 steps (−16.5, 884.1), p = 0.059

+369.6 steps (−227.3, 966.4), p = 0.224

Overall hours

 Sitting, min/16 h

−32.1 min (−57.2, −7.0), p= 0.012

−35.0 min (−65.6, −4.3), p= 0.025

−8.4 min (−57.0, 40.3), p = 0.735

 Prolonged sitting, min/16 h

−30.0 min (−56.5, −3.6), p= 0.026

−23.6 min (−54.2, 7.0), p = 0.131

+8.0 min (−37.9, 53.9), p = 0.732

 Time between sitting bouts

+1.1 min (−0.2, 2.4), p = 0.097

+1.5 min (−0.4, 3.5), p = 0.116

+0.9 min (−1.4, 3.2), p = 0.435

 Standing, min/16 h

+33.5 min (13.8, 53.3), p= 0.001

+26.9 min (1.1, 52.6), p= 0.041

−5.1 min (−44.2, 34.0), p = 0.797

 Stepping, min/16 h

−4.5 min (−13.5, 4.5), p = 0.328

+10.0 min (−1.7, 21.7), p = 0.095

+20.6 min (3.1, 38.1), p= 0.021

 Number of steps/16 h

−157.8 steps (−584.3, 268.7), p = 0.468

+440.8 steps (−119.3, 1000.9), p = 0.123

+846.5 steps (67.8, 1625.2), p= 0.033

  1. Significant changes or differences (p < 0.05) are in bold
  2. aMissing data imputed by chained equations (m = 70 imputations)
  3. bModels adjust for baseline values of the outcome and confounders (see Additional file 5)