Variables | Disease Activity Group, Entry SLEDAI-2K Score | |||||||
---|---|---|---|---|---|---|---|---|
N | Low, < 4 | Moderate, 4 to < 6 | Moderately High, 6 to ≤ 10 | Very High, > 10 | p for Between-group Differences | |||
n = 891 (44%), 95% CI 42–46 | n = 400 (20%), 95% CI 18–22 | n = 442 (22%), 95% CI 20–24 | n = 286 (14%), 95% CI 13–16 | ANOVA | Chi-square Test | Test for Trend | ||
Female, % | 2009 | 88.7 | 88.9 | 92.5 | 89.4 | 0.167 | 0.230 | |
Age, yrs, mean (SD) | 1884 | 42.2 (18.3) | 41.8 (16.2) | 43.1 (16.1) | 39.0 (14.6) | 0.018 | 0.110 | |
Disease duration, yrs, mean (SD) | 1932 | 11.7 (10.4) | 11.8 (9.8) | 10.4 (10.0) | 9.1 (9.4) | < 0.001 | < 0.001 | |
Age at diagnosis, yrs, mean (SD) | 1844 | 30.4 (15.9) | 29.6 (14.5) | 32.5 (15.5) | 29.7 (13.7) | 0.036 | 0.492 | |
Ethnicity, % | 1888 | 0.109 | 0.57 | |||||
White | 62.6 | 64.4 | 67.6 | 56.4 | (white vs all other) | |||
All non-white | 37.4 | 35.6 | 32.4 | 43.6 | ||||
Indigenous | 3.6 | 4.2 | 5.1 | 4.6 | ||||
Asian | 17.7 | 16.2 | 13.3 | 17.6 | ||||
Black | 9.3 | 7.6 | 6.3 | 13.0 | ||||
Other | 6.8 | 7.6 | 7.7 | 8.4 | ||||
Completed high school, % | 1742 | 86.6 | 82.7 | 84.3 | 83.5 | 0.564 | 0.465 | |
Total household income, %* | 944 | 0.078 | 0.006 | |||||
< $15,000 | 12.0 | 8.2 | 12.3 | 19.4 | ||||
$15,000–$29,999 | 13.0 | 15.4 | 15.1 | 17.9 | ||||
$30,000–$49,999 | 22.7 | 29.1 | 24.6 | 23.1 | ||||
≥ $50,000 | 52.3 | 47.3 | 48.0 | 39.6 |
↵* Canadian dollars. SLE: systemic lupus erythematosus; SLEDAI: SLE Disease Activity Index.