Table 2.
Characteristics of Patients with Rheumatoid Arthritis, 2004–2013
| Metric variable | Patients (N = 40,373) |
|---|---|
| Age, mean, yrs (SD) | 55 (12.9) |
| Age-group, % | |
| 18–24 yrs | 1.91 |
| 25–34 yrs | 5.56 |
| 35–44 yrs | 12.59 |
| 45–54 yrs | 24.19 |
| 55–64 yrs | 32.46 |
| ≥65 yrs | 23.28 |
| Sex, % | |
| Female | 76.14 |
| Male | 23.86 |
| Race, % | |
| White | 76.83 |
| Asian | 2.23 |
| Black | 7.68 |
| Hispanic | 8.86 |
| Unknown | 4.40 |
| CMS geography, % | |
| ME, MA, RI, CT, NH, VT | 2.73 |
| NY, NJ, PR, VI | 4.68 |
| PA, DE, MD, DC, VA, WV | 5.34 |
| KY, TN, NC, SC, GA, AL, MS, FL | 27.44 |
| MN, WI, MI, IN, IL, OH | 20.44 |
| NM, OK, AR, LA, TX | 17.55 |
| NE, IA, MO, KS | 6.19 |
| MT, ND, SD, WY, CO, UT | 5.73 |
| CA, NV, AZ, HI, GU | 7.81 |
| WA, OR, ID, AK | 2.06 |
| Insurance type, % | |
| EPO | 11.91 |
| HMO | 15.77 |
| FFS | 1.84 |
| OTH | 0.22 |
| POS | 62.28 |
| PPO | 7.98 |
| Education level, % | |
| Bachelor's degree or higher | 16.59 |
| High school diploma | 29.46 |
| Less than 12th grade | 0.66 |
| Less than a bachelor's degree | 52.78 |
| Unknown | 0.51 |
CMS indicates Centers for Medicare & Medicaid Services; EPO, exclusive provider organization; FFS, fee for service; OTH, other plan; POS, point of service; SD, standard deviation.