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Table 7 Lost earnings, quality of life and commute costs by intervention arm

From: Evaluation of an intervention to promote walking during the commute to work: a cluster randomised controlled trial

  Intervention mean (SD) n Control mean (SD) n Adjusted difference in means (95% CI)b P-valueb
Post-intervention Follow-up Post-intervention Follow-up
Productivity
 Self-assessed productivity 2.230 2.262 2.563 2.853 −0.406 0.019
(1.872) (1.827) (2.173) (2.450) (−0.744 to −0.067)
200 195 263 231  
 Self-reported days of work missed 1.005 2.013 1.441 1.709 −0.142 0.733
(2.795) (6.111) (5.125) (4.579) (−0.961 to 0.677)
199 194 262 232  
Lost earnings
 Based on self-assessed productivity £701.32 £719.30 £891.04 £1056.44 -£231.35 0.019
(£1067.41) (£1041.80) (£1238.79) (£1397.15) (−£424.77 to -£37.92)
200 195 263 231  
 Based on self-reported days of work missed £88.16 £176.57 £126.39 £149.92 -£12.50 0.733
(£245.15) (£536.05) (£449.57) (£401.70) (−£84.34 to £59.33)
199 194 262 232  
Quality of life
 ICECAP-A 0.852 0.840 0.825 0.823 0.018 0.056
(0.136) (0.134) (0.143) (0.152) (0.000 to 0.036)
197 196 264 228  
Commuting to work
 Commute costsa   £9.32   £10.99 -£1.15 0.245
(£7.67) (£12.19) (−£3.10 to £0.79)
140 131  
  1. aCommute costs collected at baseline and 12 months follow-up only
  2. bBased on a repeated measures analysis that was adjusted for time point as a categorical variable, baseline value, workplace size, workplace location, workplace type and workplace as a random effect