Table 3.
Changes in secondary outcome sitting and physical activity variables at follow-up between participants randomised to usual practice (control) or to the SMArT Work intervention*
| Secondary outcomes | No of offices (participants) | Mean change from baseline (95% CI) | Adjusted difference at follow-up† | |||||
|---|---|---|---|---|---|---|---|---|
| Control | Intervention | Control | Intervention | Coefficient (95% CI) | P value | |||
| Occupational sitting time (min/workday) | ||||||||
| 3 months | 17 (46) | 19 (63) | −6.17 (−30.24 to 17.91) | −62.09 (−83.89 to −40.30) | −50.62 (−78.71 to −22.54) | <0.001 | ||
| 6 months | 18 (48) | 19 (64) | −0.25 (−26.17 to 25.67) | −61.50 (−86.47 to −36.53) | −64.40 (−97.31 to −31.50) | <0.001 | ||
| Daily sitting time (min/day) | ||||||||
| 3 months | 17 (46) | 19 (64) | −27.57 (−58.6 to 3.43) | −49.01 (−69.41 to −28.61) | −33.46 (−67.24 to 0.32) | 0.05 | ||
| 6 months | 18 (49) | 19 (64) | 4.84 (−24.80 to 34.49) | −42.38 (−64.43 to −20.33) | −59.32 (−88.40 to −30.25) | <0.001 | ||
| 12 months | 16 (45) | 19 (62) | 7.99 (−17.17 to 33.14) | −63.03 (−86.01 to −40.04) | −82.39 (−114.54 to −50.26) | 0.001 | ||
| Occupational prolonged sitting time (min/workday) | ||||||||
| 3 months | 17 (46) | 19 (63) | –13.73 (−34.59 to 7.12) | −35.77 (−54.83 to −16.71) | −17.49 (−44.27 to 9.29) | 0.20 | ||
| 6 months | 18 (48) | 19 (64) | −5.12 (−30.09 to 19.86) | −40.81 (−60.08 to −21.54) | −35.31 (−58.75 to −11.87) | 0.003 | ||
| 12 months | 16 (45) | 19 (62) | 3.87 (−24.38 to 32.13) | −36.84 (−59.80 to −13.88) | −44.93 (−79.67 to −10.20) | 0.011 | ||
| Daily prolonged sitting time (min/day) | ||||||||
| 3 months | 17 (46) | 19 (64) | −32.19 (−62.56 to −1.81) | −41.24 (−61.78 to −20.71) | −12.33 (−29.88 to 5.23) | 0.17 | ||
| 6 months | 18 (49) | 19 (64) | 1.50 (−24.36 to 27.36) | −32.35 (−50.83 to −13.87) | −25.38 (−44.66 to −6.10) | 0.010 | ||
| 12 months | 16 (45) | 19 (62) | 10.90 (−17.01 to 38.82) | −37.19 (−59.45 to −14.93) | −58.34 (−91.18 to −25.50) | <0.001 | ||
| Occupational standing time (min/workday) | ||||||||
| 3 months | 17 (46) | 19 (63) | 7.99 (−16.93 to 32.92) | 58.43 (38.18 to 78.67) | 48.91 (19.21 to 78.61) | <0.001 | ||
| 6 months | 18 (48) | 19 (64) | −3.94 (−27.15 to 19.28) | 68.34 (46.59 to 90.09) | 72.62 (44.80 to 100.44) | <0.001 | ||
| 12 months | 16 (45) | 19 (62) | −4.15 (−28.89 to 20.59) | 66.92 (46.04 to 87.80) | 66.00 (38.14 to 93.86) | <0.001 | ||
| Daily standing time (min/day) | ||||||||
| 3 months | 17 (46) | 19 (64) | 14.40 (−8.97 to 37.78) | 44.45 (27.35 to 61.53) | 36.95 (9.28 to 64.62) | 0.009 | ||
| 6 months | 18 (49) | 19 (64) | −7.48 (−31.73 to 16.66) | 43.28 (23.39 to 63.18) | 55.96 (28.23 to 83.69) | <0.001 | ||
| 12 months | 16 (45) | 19 (62) | −6.31 (−28.46 to 15.85) | 49.38 (29.08 to 69.67) | 62.81 (36.24 to 89.39) | <0.001 | ||
| Occupational stepping time (min/workday) | ||||||||
| 3 months | 17 (46) | 19 (63) | 1.28 (−2.51 to 5.07) | 2.41 (−1.57 to 6.39) | 1.33‡ (−2.68 to 5.34) | 0.52 | ||
| 6 months | 18 (48) | 19 (64) | 2.26 (−2.13 to 6.65) | 4.56 (0.59 to 8.53) | 3.56 (−1.18 to 8.30) | 0.14 | ||
| 12 months | 16 (45) | 19 (62) | 0.33 (−4.07 to 4.73) | −1.61 (−5.70 to 2.48) | 0.0003 (−5.15 to 5.15) | 1.00 | ||
| Daily stepping time (min/day) | ||||||||
| 3 months (min/day) | 17 (46) | 19 (64) | 15.95 (8.26 to 23.64) | 8.69 (3.08 to 14.30) | −6.44 (−16.16 to 3.28) | 0.19 | ||
| 6 months (min/day) | 18 (49) | 19 (64) | 1.29 (−5.76 to 8.35) | 5.11 (−0.53 to 10.76) | 7.06 (−2.39 to 16.50) | 0.14 | ||
| 12 months (min/day) | 16 (45) | 19 (62) | 3.75 (−2.81 to 10.32) | 2.63 (−3.35 to 8.61) | 1.21 (−8.18 to 10.60) | 0.80 | ||
| Occupational MVPA (ActiGraph) (min/workday) | ||||||||
| 3 months | 17 (43) | 19 (61) | 3.71 (−4.63 to 12.05) | 0.50 (−3.51 to 4.51) | −1.72 (−6.68 to 3.23) | 0.50 | ||
| 6 months | 15 (38) | 18 (57) | 3.04 (−1.58 to 7.66) | 1.39 (−2.63 to 5.40) | −0.61 (−7.89 to 6.68) | 0.87 | ||
| 12 months | 16 (38) | 19 (56) | 0.12 (−4.04 to 4.30) | −0.15 (−4.96 to 4.66) | 2.26 (−4.22 to 8.74) | 0.49 | ||
| Daily MVPA (ActiGraph) (min/day) | ||||||||
| 3 months | 17 (45) | 19 (64) | 10.48 (1.11 to 19.85) | −0.38 (−6.22 to 5.46) | −9.75 (−20.86 to 1.36) | 0.09 | ||
| 6 months | 15 (41) | 18 (57) | 0.44 (−7.88 to 8.76) | 1.43 (−5.02 to 7.88) | 4.50 (−6.64 to 15.64) | 0.43 | ||
| 12 months | 16 (39) | 19 (56) | 0.87 (−7.60 to 9.34) | 0.46 (−7.01 to 7.92) | 1.01 (−9.27 to 11.29) | 0.85 | ||
MVPA=moderate to vigorous physical activity.
Including participants who have worn the accelerometer with a minimum of one valid day at baseline and three months, baseline and six months, and baseline and 12 months.
Adjusted difference in mean sitting at follow-up between treatment groups with 95% confidence interval, P value; adjusted for cluster effect, baseline sitting, average activPAL wear time during work hours/activPAL waking wear time across baseline and three months, average activPAL wear time during work hours/activPAL waking wear time across baseline and six months, average activPAL wear time during work hours/activPAL waking wear time across baseline and 12 months and stratification categories (cluster size ≤4 and >4 participants).
Used independent correlation structure. Model did not converge with exchangeable correlation structure.