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Table 2 Changes in mean daily steps per day across any valid day/s at 6-month follow-up

From: The effectiveness of the Structured Health Intervention For Truckers (SHIFT): a cluster randomised controlled trial (RCT)

  Number of clusters Number of participants Baseline
Mean (SD)
6-month follow-up
Mean (SD)
Mean change from baseline to 6 months (SD) SHIFT vs. control at 6 months
Control SHIFT Control SHIFT Control SHIFT Control SHIFT Control SHIFT Adjusted mean
difference (95% CI)a
p-value
Primary analysis (complete case)b 13 12 119 90 8932 (2922) 9355 (3305) 8216 (2767) 9387 (3455) − 716 (2109) 32 (2939) 1008 (145, 1871) 0.022
Intention to treatb
 Multiple imputation c 13 12 199 183 335 (− 471, 1141) 0.414
 Worst case scenario d 13 12 199 183 8788 (2843) 9394 (3134) 8244 (2270) 8846 (2527) − 544 (2499) − 548 (3056) 399 (− 129, 927) 0.139
 Best case scenario e 13 12 199 183 8788 (2843) 9464 (3127) 8244 (2270) 9344 (2466) − 543 (2499) − 120 (2985) 868 (398, 1338) < 0.001
Sensitivity analyses—effect of number of valid activPAL days (complete-case):
 ≥ 2 days 13 12 118 88 8960 (2919) 9427 (3291) 8238 (2768) 9411 (3488) − 722 (2117) − 16 (2949) 981 (102, 1860) 0.029
 ≥ 3 days 13 12 116 87 8925 (2921) 9459 (3296) 8278 (2770) 9456 (3484) − 647 (2015) − 4 (2963) 906 (27, 1784) 0.043
 ≥ 4 days 13 12 113 79 8832 (2877) 9385 (3290) 8179 (2710) 9480.69 (3509) − 653 (2020) 96 (3028) 973 (76, 1870) 0.034
  1. aAdjusted for steps per day at baseline, average waking wear time across baseline and 6 months, and cluster size category (small < 40; large ≥ 40) with a random effect for cluster (depot).
  2. b≥ 1 valid day at baseline and 6 months
  3. cMeans (SDs) cannot be calculated for intention to treat population because multiple imputation methodology was used
  4. dMissing outcome data in the final analysis model (at baseline and 6 months) was replaced using the mean for the standard care arm
  5. eMissing outcome data in the final analysis model (at baseline and 6 months) was replaced using the mean from the respective arm