Table 2.
Changes in occupational sitting time at 12 month follow up between participants randomised to usual practice (control) or SMArT Work intervention
| Variables | No of clusters (participants) | Mean change from baseline (95% CI) | Adjusted difference at follow-up* | |||||
|---|---|---|---|---|---|---|---|---|
| Control | Intervention | Control | Intervention | Coefficient (95% CI) | P value | |||
| Complete case† | ||||||||
| Occupational sitting (min/workday) | 16 (45) | 19 (62) | 9.22 (−17.65 to 36.09) | −71.99 (−97.37 to −46.61) | −83.28 (−116.57 to −49.98) | 0.001 | ||
| Intention to treat‡ | ||||||||
| Occupational sitting (min/workday) | 18 (69) | 19 (77) | 6.59 (−20.46 to 33.64) | −77.58 (−101.62 to −53.54) | −81.64§ (−112.27 to −51.01) | <0.001 | ||
| Standardised waking/occupational hours | ||||||||
| 8 hour workday¶: | ||||||||
| Occupational sitting (min/8 h workday) | 16 (45) | 19 (62) | 3.78 (−11.23 to 18.78) | −35.21 (−49.12 to −21.31) | −41.29 (−59.88 to −22.69) | <0.001 | ||
| Effect on No of valid activPAL days | ||||||||
| ≥2 working days: | ||||||||
| Occupational sitting (min/workday) | 15 (44) | 19 (60) | 11.19 (−16.01 to 38.39) | −73 (−99.63 to −47.92) | −86.14 (−119.38 to −52.90) | <0.001 | ||
| ≥3 working days: | ||||||||
| Occupational sitting (min/workday) | 15 (41) | 17 (52) | 6.45 (−21.28 to 34.18) | −74.06 (−102.78 to −45.35) | −80.66 (−111.74 to −49.58) | <0.001 | ||
Adjusted difference in mean sitting time at follow-up between treatment groups, P value adjusted for cluster effect, baseline sitting time, average activPAL wear time during work hours across baseline and 12 months and stratification categories (cluster size ≤4 and >4 participants).
Including participants who have worn the accelerometer with a minimum of one valid day at baseline and 12 months.
Missing data imputed using multiple imputation.
Convergence not achieved—independent correlation structure used.
Averaged over amount of time (in hours) participants wore device and normalised to 8 hour workday.