Table 3.
Logistic regression models predicting RUQ1 non-completion
| Univariate analysis2 |
Multivariate analysis3 |
|||
|---|---|---|---|---|
| Odds ratio (95% CI) |
P-value | Odds ratio (95% CI) |
P-value | |
| Age at baseline visit | 0.97 (0.95, 0.99) | 0.009 | 0.99 (0.96, 1.02) | 0.403 |
| Gender | 0.806 | 0.494 | ||
| Male | Reference | Reference | ||
| Female | 1.10 (0.53, 2.54) | 1.41 (0.55, 4.22) | ||
| Race | 0.205 | 0.641 | ||
| White | Reference | Reference | ||
| Black or African American | 1.10 (0.39, 2.64) | 1.41 (0.36, 4.65) | ||
| Other | 2.33 (0.91, 5.46) | 1.67 (0.48, 5.09) | ||
| Ethnicity | 0.855 | 0.722 | ||
| Hispanic or Latino | 0.91 (0.30, 2.29) | 0.80 (0.20, 2.55) | ||
| Not Hispanic or Latino | Reference | Reference | ||
| Employment status | 0.424 | 0.456 | ||
| Full-time | 1.29 (0.69, 2.43) | 1.33 (0.63, 2.84) | ||
| Other | Reference | Reference | ||
| Marital status | 0.637 | 0.713 | ||
| Married | 0.86 (0.46, 1.63) | 1.17 (0.52, 2.81) | ||
| Not Married | Reference | Reference | ||
| Patient indicated interest in receiving emailed surveys and provided an email address | 0.002 | 0.007 | ||
| No | Reference | Reference | ||
| Yes | 3.13 (1.49, 7.41) | 3.34 (1.37, 9.49) | ||
| Tendon friction rubs (anywhere on active palpation of ankles, knees, wrists or elbows) | 0.316 | 0.780 | ||
| No | Reference | Reference | ||
| Yes | 0.59 (0.17, 1.57) | 0.84 (0.22, 2.64) | ||
| Calcinosis = Severe or Mild | 0.775 | 0.118 | ||
| No | Reference | Reference | ||
| Yes | 1.21 (0.27, 3.88) | 3.65 (0.69, 15.82) | ||
| Hand Modified Rodnan Skin Score | 0.945 | 0.489 | ||
| Negative | Reference | Reference | ||
| Mild/Moderate | 0.81 (0.25, 3.63) | 0.38 (0.08, 2.83) | ||
| Severe | 0.87 (0.22, 4.37) | 0.28 (0.04, 2.52) | ||
| Small Joint Contracture | 0.814 | 0.315 | ||
| Absent | Reference | Reference | ||
| Present | 0.93 (0.51, 1.69) | 1.50 (0.68, 3.31) | ||
| Acro-osteolysis | 0.035 | 0.075 | ||
| Absent | Reference | Reference | ||
| Present | 3.31 (1.09, 9.19) | 4.08 (0.86, 19.17) | ||
| Active Digital Ulcer (including Gangrene) | 0.542 | 0.998 | ||
| Absent | Reference | Reference | ||
| Present | 1.30 (0.53, 2.87) | 1.00 (0.27, 3.12) | ||
1
Resource Utilization Questionnaire (RUQ): completed once every year so this outcome is whether the subject completed it at baseline or 6 months.
2
Results are 13 different univariate (unadjusted) logistic models. The number of subjects in each model (N) is as follows: Age =339, Gender=339, Race=330, Ethnicity=331, Employment status=319, Marital status=333, Email =339, Tendon rubs=330, Calcinosis =336, Hand rodnan=338, Small joint contracture=324, Acro-osteolysis=321, Digital ulcers=339.
3
Results are 1 multivariate logistic model with all listed predictors. N=270 with 40 having completed RUQ in the first year.