Table 3. Number of Dermatologist Visits and Acne Prescriptions.
| Characteristic | Visits | Prescriptions | ||
|---|---|---|---|---|
| No., Median (IQR) | Adjusted IRR (95% CI) | No., Median (IQR) | Adjusted IRR (95% CI) | |
| Race/ethnicity | ||||
| Non-Hispanic white | 1 (1-2) | Reference | 1 (0-3) | Reference |
| Non-Hispanic black | 1 (1-2) | 0.99 (0.88-1.12) | 1 (0-2) | 0.89 (0.84-0.95) |
| Non-Hispanic Asian | 1 (1-2) | 0.96 (0.84-1.10) | 1 (0-2) | 0.94 (0.86-1.02) |
| Hispanic | 1 (1-2) | 1.00 (0.86-1.15) | 1 (0-2) | 0.95 (0.88-1.02) |
| Other | 1 (1-2) | 0.92 (0.85-1.01) | 1 (0-2) | 0.85 (0.81-0.89) |
| Age at diagnosis | NA | 0.98 (0.98-0.98) | NA | 0.98 (0.98-0.98) |
| Sex | ||||
| Female | 1 (1-2) | Reference | 1 (0-3) | Reference |
| Male | 1 (1-2) | 1.10 (1.02-1.19) | 1 (0-2) | 0.84 (0.81-0.86) |
| Region | ||||
| Midwest | 1 (1-2) | Reference | 1 (0-3) | Reference |
| Northeast | 1 (1-2) | 0.99 (0.89-1.10) | 1 (0-2) | 0.85 (0.81-0.90) |
| South | 1 (1-2) | 1.47 (1.35-1.60) | 1 (0-2) | 0.93 (0.89-0.97) |
| West | 1 (1-2) | 0.97 (0.88-1.08) | 1 (0-2) | 0.95 (0.90-1.01) |
| Insurance type | ||||
| Commercial | 1 (1-2) | Reference | 1 (0-3) | Reference |
| Medicaid | 1 (1-2) | 1.34 (1.19-1.51) | 1 (0-2) | 0.89 (0.84-0.95) |
| Medicare | 1 (1-1) | 1.35 (0.73-2.48) | 0 (0-1) | 0.93 (0.81-1.06) |
| Uninsured | 1 (1-2) | 0.75 (0.61-0.94) | 0 (0-1) | 0.51 (0.43-0.61) |
| Mixed: insured | 1 (1-2) | 1.05 (0.96-1.14) | 1 (0-2) | 0.94 (0.90-0.98) |
| Mixed: uninsured | 1 (1-2) | 1.37 (0.68-2.77) | 1 (0-2) | 0.90 (0.80-1.02) |
| Unknown | 1 (1-2) | 0.83 (0.76-0.90) | 0 (0-2) | 0.84 (0.80-0.89) |
| Other | 1 (1-2) | 1.01 (0.86-1.20) | 2 (0-3) | 1.11 (1.02-1.21) |
| Mean household income, $1000 | NA | 0.99 (0.99-1.00) | NA | 1.00 (1.00-1.00) |
| Percentage with college education | NA | 1.01 (1.00-1.01) | NA | 0.99 (0.99-0.99) |
| Seen by a dermatologist at least once | NA | 2.92 (2.72-3.13) | NA | 1.80 (1.74-1.86) |
Abbreviations: IQR, interquartile range; IRR, incidence rate ratio; NA, not applicable.