Table 4. Factors Associated With Work Relative Value Units of Outpatient Encounters in a Combined Dermatologic Practice, Including Mohs Surgeons .
| Variable | wRVUs per encounter, mean (SD) | β (95% CI)a | |
|---|---|---|---|
| Crude | Adjusted | ||
| Overall | 1.89 (2.63) | NA | NA |
| Age per y | NA | 0.027 (0.026 to 0.028) | 0.019 (0.017 to 0.020) |
| Sex | |||
| Male | 2.25 (3.29) | 1 [Reference] | 1 [Reference] |
| Female | 1.63 (1.99) | −0.63 (−0.59 to −0.66) | −0.43 (−0.39 to −0.47) |
| Race | |||
| White | 2.13 (3.00) | 1 [Reference] | 1 [Reference] |
| Black | 1.27 (1.06) | −0.86 (−0.82 to −0.91) | −0.65 (−0.61 to −0.70) |
| Asian | 1.28 (1.19) | −0.85 (−0.75 to −0.95) | −0.51 (−0.41 to −0.61) |
| Otherb | 1.41 (1.63) | −0.73 (−0.55 to −0.91) | −0.39 (−0.22 to −0.57) |
| Insurance typec | |||
| Commercial | 1.85 (2.50) | −0.19 (−0.15 to −0.24) | 0.32 (0.26 to 0.38) |
| Medicare | 2.37 (3.52) | 0.75 (0.71 to 0.79) | 0.37 (0.30 to 0.43) |
| Medicaid | 2.10 (3.16) | 0.22 (0.09 to 0.35) | 0.81 (0.68 to 0.94) |
| Self-pay | 1.72 (2.45) | −0.18 (−0.37 to 0.02) | 0.33 (0.14 to 0.53) |
| Otherd | 1.75 (2.20) | −0.14 (−0.00 to −0.29) | 0.22 (0.07 to 0.36) |
Abbreviations: NA, not applicable; wRVUs, work relative value units.
a
β estimates were the change in wRVUs billed per encounter by patient characteristic.
b
Other races included American Indian or Native American, Native Hawaiian or Other Pacific Islander, and multiple races.
c
Individual patients may have multiple insurance coverage. Therefore, each insurance type was analyzed as its own dichotomous variable (ie, present or absent). For example, in the crude analysis, the encounters associated with commercial insurance had 0.038 (95% CI, 0.025-0.051) fewer wRVUs than the encounters without commercial insurance.
d
Other insurance types were predominantly government-sponsored insurance programs.