Table 2.
Characteristics of survey respondents compared to nonrespondents a
| Variable |
Respondents n = 203 |
Nonrespondents n = 237 |
P Value |
|---|---|---|---|
| Age, y |
46 ± 13 44 (55‐57) |
44 ± 13 41 (35‐51) |
.03 |
| Male gender | 133 (66%) | 154 (65%) | .91 |
| White race | 157 (77%) | 138 (58%) | <.01 |
| AS classification | 147 (72%) | 157 (68%) | .16 |
| Biologic use at baseline | 83 (41%) | 108 (47%) | .47 |
| NSAID use at baseline | 106 (52%) | 133 (58%) | .32 |
| BASDAI at baseline, (0‐10) |
2.3 ± 1.8 1.9 (0.9‐3.4) |
2.9 ± 2.3 2.4 (1.0‐4.7) |
.08 |
Continuous variables are reported as mean ± SD and median (interquartile range) and categorical variables as n (%). To assess differences between high‐ and low‐stress level groups, we used χ2 tests for categorical variables and Mann‐Whitney U tests for continuous variables. Values missing for the following: AS classification (n = 7 nonrespondents), biologic use (n = 7 nonrespondents), NSAID use (n = 7 nonrespondents), baseline BASDAI (n = 43 respondents, n = 102 nonrespondents).
Abbreviations: AS, ankylosing spondylitis; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; NSAID, nonsteroidal anti‐inflammatory drug.
Total cohort of 473. Not included in this table: 26 declined survey participation and 7 who were deceased.