Table 3.

Univariable and multivariable associations with RAPID-3 scores.

FactornUnivariableMultivariable
β Coefficient (95% CI)Pβ Coefficient (95% CI)P
Age345−0.01 (−0.07 to 0.04)NS
Sex3452.49 (1.07–3.91)0.0011.20 (−0.53 to 2.93)*0.17
Race339
  WhiteREF
  Black/African American4.69 (−0.76 to 10.15)NS
  Native American2.16 (−7.23 to 11.55)NS
  Asian−0.03 (−3.92 to 3.87)NS
  Hispanic/Latino5.94 (0.99–11.00)0.02
  Other3.18 (−0.57 to 6.93)NS
Body mass index3430.19 (0.08–0.29)< 0.001
Smokers (ever vs never)2741.22 (−0.42 to 2.86)NS
Alcohol (current use)273−2.12 (−3.66 to −0.58)0.007
Center3450.83 (0.27–1.40)0.004
Education203
  No college degreeREF
  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
Insurance179
  UninsuredREF
  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
Work180
  Looking for workREF
  Full time2.20 (−5.43 to 9.82)NS
  Part time4.92 (−3.26 to 13.11)NS
  Disabled/sick leave9.46 (1.48–17.44)0.02
  Student6.03 (−3.17 to 15.22)NS
  Homemaker2.38 (−5.88 to 10.56)NS
  Retired4.08 (−3.86 to 12.03)NS
Income169
  < $30KREF
  ≥ $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, yrs292−0.04 (−0.11 to 0.03)NS
Psoriasis duration, yrs288−0.02 (−0.07 to 0.03)NS
ASAS classification1490.68 (−2.05 to 3.41)NS
Inflammatory back pain180−0.04 (−2.49 to 2.41)NS
Osteoarthritis2090.65 (−1.32 to 2.62)NS
Fibromyalgia2096.10 (2.611–9.56)0.0014.51 (1.13–7.88)0.009
History of diabetes3450.37 (−1.85 to 2.60)NS
History of cardiovascular disease3442.12 (0.31–3.93)0.02
Depression2984.15 (2.42–5.89)< 0.001
Total swollen joint count2300.67 (0.44–0.90)< 0.001
Total tender joints2300.38 (0.26–0.50)< 0.0010.25 (0.14–0.36)< 0.001
Enthesitis count1782.13 (1.09–3.17)< 0.0011.20 (0.30–2.01)0.009
Dactylitis count1811.13 (−0.30 to 2.5)0.12
Nail dystrophy143−1.06 (−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.