Factor | n | Univariable | Multivariable | ||
---|---|---|---|---|---|
β Coefficient (95% CI) | P | β Coefficient (95% CI) | P | ||
Age | 345 | −0.01 (−0.07 to 0.04) | NS | ||
Sex | 345 | 2.49 (1.07–3.91) | 0.001 | 1.20 (−0.53 to 2.93)* | 0.17 |
Race | 339 | ||||
White | REF | ||||
Black/African American | 4.69 (−0.76 to 10.15) | NS | |||
Native American | 2.16 (−7.23 to 11.55) | NS | |||
Asian | −0.03 (−3.92 to 3.87) | NS | |||
Hispanic/Latino | 5.94 (0.99–11.00) | 0.02 | |||
Other | 3.18 (−0.57 to 6.93) | NS | |||
Body mass index | 343 | 0.19 (0.08–0.29) | < 0.001 | ||
Smokers (ever vs never) | 274 | 1.22 (−0.42 to 2.86) | NS | ||
Alcohol (current use) | 273 | −2.12 (−3.66 to −0.58) | 0.007 | ||
Center | 345 | 0.83 (0.27–1.40) | 0.004 | ||
Education | 203 | ||||
No college degree | REF | ||||
College | −2.5 (−4.88 to −0.13) | 0.04 | −1.66 (−3.83 to 0.49) | 0.13 | |
Postgraduate degree | −5.24 (−7.92 to −2.56) | < 0.001 | −3.16 (−5.61 to 0.72) | 0.01 | |
Insurance | 179 | ||||
Uninsured | REF | ||||
Medicare/Medicaid | −11.63 (−20.94 to −2.32) | 0.02 | −10.47 (−18.16 to 2.78) | 0.008 | |
Private | −15.88 (−25.03 to −6.72) | 0.001 | −13.42 (−20.98 to 5.85) | 0.001 | |
Both | −15.28 (−24.94 to −5.61) | 0.002 | −15.59 (−23.69 to 7.49) | < 0.001 | |
Work | 180 | ||||
Looking for work | REF | ||||
Full time | 2.20 (−5.43 to 9.82) | NS | |||
Part time | 4.92 (−3.26 to 13.11) | NS | |||
Disabled/sick leave | 9.46 (1.48–17.44) | 0.02 | |||
Student | 6.03 (−3.17 to 15.22) | NS | |||
Homemaker | 2.38 (−5.88 to 10.56) | NS | |||
Retired | 4.08 (−3.86 to 12.03) | NS | |||
Income | 169 | ||||
< $30K | REF | ||||
≥ $30K–60K | −3.19 (−6.42 to 0.03) | 0.05 | |||
> $60K–$100K | −5.99 (−9.21 to 2.77) | < 0.001 | |||
> $100K–$250K | −5.13 (−8.37 to 1.89) | 0.002 | |||
> $250K | −10.54 (−14.81 to −6.26) | < 0.001 | |||
PsA duration, yrs | 292 | −0.04 (−0.11 to 0.03) | NS | ||
Psoriasis duration, yrs | 288 | −0.02 (−0.07 to 0.03) | NS | ||
ASAS classification | 149 | 0.68 (−2.05 to 3.41) | NS | ||
Inflammatory back pain | 180 | −0.04 (−2.49 to 2.41) | NS | ||
Osteoarthritis | 209 | 0.65 (−1.32 to 2.62) | NS | ||
Fibromyalgia | 209 | 6.10 (2.611–9.56) | 0.001 | 4.51 (1.13–7.88) | 0.009 |
History of diabetes | 345 | 0.37 (−1.85 to 2.60) | NS | ||
History of cardiovascular disease | 344 | 2.12 (0.31–3.93) | 0.02 | ||
Depression | 298 | 4.15 (2.42–5.89) | < 0.001 | ||
Total swollen joint count | 230 | 0.67 (0.44–0.90) | < 0.001 | ||
Total tender joints | 230 | 0.38 (0.26–0.50) | < 0.001 | 0.25 (0.14–0.36) | < 0.001 |
Enthesitis count | 178 | 2.13 (1.09–3.17) | < 0.001 | 1.20 (0.30–2.01) | 0.009 |
Dactylitis count | 181 | 1.13 (−0.30 to 2.5) | 0.12 | ||
Nail dystrophy | 143 | −1.06 (−3.53 to 1.41) | NS |
↵* Sex was retained in the final model as it was felt to be biologically relevant despite not being significant. The β coefficients can be interpreted as the difference in the mean PRO score between the 2 groups. The 95% CI do not include 0 (no difference). CI that do not cross 0 indicate statistical difference. Every increase in year of age results in an inverse relationship with the RAPID3 score. RAPID3: Routine Assessment of Patient Index Data 3; NS: not significant; PsA: psoriatic arthritis; ASAS: Assessment of Spondyloarthritis international Society; PRO: patient-reported outcomes.