Introduction
Methods
Study design and participants
Measurement of physical activity and sedentary behaviour
Demographic variables and outcome measures
Statistical analysis
Results
n (%) | Mean ± SD (range) | |
---|---|---|
Demographics | ||
Age (years) | 49.0 ± 11.7 (25–79) | |
Gender (M:F) | 23:22 | |
Duration of diagnosis (years) | 15.6 ± 11.2 (1–45) | |
BMI (kg/m2) | 27.4 ± 5.6 (17.3–41.6) | |
Work status | ||
Paid employment | 31 (69%) | |
Retired/medically retired | 9 (20%) | |
Unemployed | 3 (7%) | |
Off work | 1 (2%) | |
Student | 1 (2%) | |
Current treatment | ||
Anti-TNF | 25 (50%) | |
NSAIDs | 30 (60%) | |
Pain relief | 22 (44%) | |
Physio/exercise class | 4 (8%) | |
Disease activity/mobility/function | ||
BASDAI (0–10) | 4.5 ± 2.3 (0.4–8.7) | |
Low disease activity (BASDAI < 4) | 17 (38%) | |
Active disease activity (BASDAI ≥ 4) | 28 (62%) | |
BASMI (0–10) | 3.6 ± 1.8 (0.4–7.5) | |
BASFI (0–10) | 4.4 ± 2.6 (0.4–9.3) | |
Exercise capacity | ||
6 min walk test (m) | 414 ± 106 (121–622) |
All participants n = 45 (% of waking hours) | Low disease activity (BASDAI < 4) n = 17 (% of waking hours) | Active disease activity (BASDAI ≥ 4) n = 28 (% of waking hours) | |
---|---|---|---|
Waking hours (hrs) | 16.6 ± 1.4 | 16.4 ± 1.0 | 16.7 ± 1.6 |
Sleep hours (hrs) | 7.4 ± 1.4 | 7.6 ± 1.0 | 7.3 ± 1.6 |
Walking duration (mins/day) | 93.2 ± 41.5 (9 ± 4%) | 98.6 ± 39.6 (10 ± 4%) | 90.0 ± 43.0 (9 ± 4%) |
Standing duration (hrs/day) | 4.2 ± 1.7 (26 ± 10%) | 4.4 ± 1.5 (27 ± 9%) | 4.2 ± 1.9 (25 ± 11%) |
Sitting duration (hrs/day) | 10.8 ± 2.3 (65 ± 13%) | 10.4 ± 1.7 (63 ± 12%) | 11.1 ± 2.6 (66 ± 14%) |
Steps/day | 7200 ± 3397 | 7615 ± 3212 | 6948 ± 3538 |
Steps/hour | 436 ± 203 | 462 ± 192 | 419 ± 212 |
Walking duration at > 100 steps/min (mins/day) | 20.3 ± 16.0 | 21.5 ± 15.7 | 19.6 ± 16.4 |
Mean steps/walking event | 18.5 ± 6.2 | 18.1 ± 5.1 | 18.7 ± 6.9 |
Mean walking event cadence (steps/min) | 69.6 ± 4.6 | 70.1 ± 5.4 | 69.3 ± 4.1 |
Mean MVPA (mins/week) | 121 ± 97 | 128.9 ± 94.6 | 115.9 ± 99.1 |
Participants ≥ 150 mins of MVPA (n) | 15/45 | 7/17 | 8/28 |
Sitting events (n/day) | 49.1 ± 17.2 | 48.0 ± 14.7 | 49.8 ± 18.7 |
Prolonged sitting events > 30 min (n/day) | 6.0 ± 2.0 | 5.8 ± 1.7 | 6.1 ± 2.1 |
Total duration of prolonged sitting > 30 min (h/day) | 6.7 ± 2.9 (40 ± 18%) | 6.3 ± 2.4 (38 ± 17%) | 6.9 ± 3.2 (40 ± 17%) |
Variable | BASDAI | BASMI | BASFI | ASQOL | 6MWT | |
---|---|---|---|---|---|---|
Sleep hours | r | − 0.65 | 0.115 | − 0.001 | − 0.061 | − 0.146 |
p | 0.671 | 0.453 | 0.993 | 0.691 | 0.340 | |
Walking time | r | − 0.162 | − 0.197 | − 0.395 | − 0.375 | 0.396 |
p | 0.288 | 0.195 | 0.007 | 0.011 | 0.007 | |
Steps taken | r | − 0.167 | − 0.220 | − 0.404 | − 0.361 | 0.421 |
p | 0.272 | 0.147 | 0.006 | 0.015 | 0.004 | |
Stand time | r | − 0.111 | − 0.077 | − 0.200 | − 0.305 | 0.278 |
p | 0.468 | 0.617 | 0.188 | 0.042 | 0.065 | |
MVPA mins | r | − 0.189 | − 0.235 | − 0.358 | − 0.254 | 0.451 |
p | 0.213 | 0.120 | 0.016 | 0.092 | 0.002 | |
Duration of walking events | r | − 0.058 | − 0.352 | − 0.316 | − 0.095 | 0.404 |
p | 0.707 | 0.018 | 0.034 | 0.536 | 0.006 | |
Cadence of walking event | r | − 0.125 | − 0.040 | − 0.063 | 0.085 | 0.130 |
p | 0.412 | 0.796 | 0.681 | 0.579 | 0.393 | |
Sitting time | r | 0.180 | 0.048 | 0.289 | 0.380 | − 0.235 |
p | 0.236 | 0.796 | 0.054 | 0.010 | 0.120 | |
Prolonged sitting event duration (> 30 min) | r | 0.100 | 0.010 | 0.280 | 0.294 | − 0.357 |
p | 0.513 | 0.950 | 0.062 | 0.050 | 0.016 |