Table 2.
Characteristics and physical activity levels between patients with axSpA with inactive vs low or high or very high disease activity
| Characteristics | Inactive disease N = 27 |
Low, high or very high disease activity N = 47 |
P value |
|---|---|---|---|
| Current age, median (IQR), years | 34.0 (23.0) | 42.0 (28.0) | 0.14 |
| Sex, male, n (%) | 19 (70.4) | 37 (78.7) | 0.42 |
| Race, Chinese, n (%) | 23 (85.2) | 42 (89.4) | 0.72 |
| Body mass index, median (IQR), kg m−2 | 22.6 (5.2) | 24.3 (4.9) | 0.06 |
| Smoking status | |||
| Currently smoking, n (%) | 8 (29.6) | 18 (38.3) | 0.45 |
| Ex-smoker, n (%) | 19 (70.4) | 29 (61.7) | |
| Alcohol drinkers, n (%) | 17 (63.0) | 31 (67.4) | 0.70 |
| BASFI (range 0–10), median (IQR) | 1.1 (0.6) | 1.9 (2.0) | < 0.01 |
| ASDAS-CRP (range 0–10), median (IQR) | 1.1 (0.3) | 2.0 (1.0) | < 0.01 |
| Co-morbidities | |||
| Hypertension, n (%) | 4 (14.8) | 7 (14.9) | 1.00 |
| Diabetes mellitus, n (%) | 0 (0) | 3 (6.4) | 0.30 |
| Hyperlipidemia, n (%) | 2 (7.4) | 4 (8.5) | 1.00 |
| Coronary artery disease, n (%) | 1 (3.7) | 3 (6.4) | 1.00 |
| Chronic kidney disease, n (%) | 0 (0) | 2 (4.3) | 0.53 |
| Employed, n (%) | 22 (81.5) | 35 (74.5) | 0.49 |
| WHO recommendations on physical activity for health | |||
| Meets WHO recommendations†, n (%) | 21 (77.8) | 36 (76.6) | 0.91 |
| Median time of total physical activity on average per day (IQR), minutes | 68.6 (145.7) | 57.9 (85.7) | 0.46 |
| Median time spent on work-related physical activity on average per day (IQR), minutes | 0 (34.3) | 0 (17.1) | 0.71 |
| Median time spent on travel-related physical activity on average per day (IQR), minutes | 8.6 (60.0) | 14.3 (30.0) | 0.65 |
| Median time spent on recreational-related physical activity on average per day (IQR), minutes | 12.9 (64.3) | 15.0 (42.9) | 0.37 |
| Doing no work-, transport-, or recreation-related physical activity, n (%) | 4 (14.8) | 5 (10.6) | 0.72 |
| WHO level of physical activity | |||
| Low level of physical activity, n (%) | 6 (22.2) | 11 (23.4) | 0.47 |
| Moderate level of physical activity, n (%) | 7 (25.9) | 18 (38.3) | |
| High level of physical activity, n (%) | 14 (51.9) | 18 (38.3) | |
| High level of sedentary activity§, n (%) | 18 (66.7) | 24 (51.1) | 0.19 |
Abbreviation
ASDAS-CRP Ankylosing Spondylitis Disease Activity Score with C-Reactive Protein, AxSpA Axial spondyloarthritis, BASFI Bath Ankylosing Spondylitis Functional Index, IQR interquartile range, WHO World Health Organization
†Meeting WHO recommendations on physical activity for health includes: (i) 150 min of moderate-intensity physical activity or (ii) 75 min of vigorous-intensity physical activity or (iii) An equivalent combination of moderate- and vigorous-intensity physical activity achieving at least 600 MET-minutes
§Defined as more than 8 h of sedentary