Table 2.
Summary Statistics for Patients with RA Diagnosis, 2000–2005
| All Newly Diagnosed RA Patients | Biologic Users among RA Patients | |||
|---|---|---|---|---|
| Patients Who Never Initiated Biologic Therapy | Patients Who Initiated Biologic Therapy | Patients Who Do Not Continue Biologic Use Every Year Post Initiation | Patients Who Continue Biologic Use Every Year Post Initiation | |
| Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | |
| Demographics | ||||
| Age | 64 (15) | 59 (13) | 62(14) | 59 (13) |
| Age 65 or older (%) | 50 | 33 | 47 | 35 |
| Male (%) | 30 | 32 | 22 | 26 |
| Socioeconomic status | ||||
| Currently working (%) | 27 | 36 | 23 | 32 |
| Median HH income (U.S.$) | 42,505 (10,051) | 43,132 (10,491) | 41,758 (9,852) | 42,260 (9,982) |
| Urban residence (%) | 99 | 99 | 99 | 99 |
| Household composition | ||||
| One or more family members (in plan) (%) | 65 | 75 | 66 | 71 |
| Family size | 1.91 (0.96) | 2.09 (0.98) | 1.89 (0.90) | 2.01 (0.95) |
| Family size given at least one additional family member | 2.4 (0.85) | 2.46 (0.86) | 2.36 (0.78) | 2.42 (0.83) |
| Comorbid conditions (RA patient) (%) | ||||
| Asthma | 5 | 4 | 7 | 4 |
| Hypertension | 34 | 23 | 26 | 22 |
| Diabetes | 12 | 8 | 11 | 9 |
| Hyperlipidemia | 12 | 8 | 6 | 7 |
| Heart disease | 20 | 12 | 18 | 13 |
| Depression | 6 | 6 | 6 | 4 |
| Osteoarthritis | 23 | 15 | 21 | 13 |
| Use of RA drugs (RA patient) (%) | ||||
| NSAID or analgesics | 57 | 67 | 64 | 63 |
| Corticosteroids | 41 | 65 | 68 | 60 |
| Nonbiologic DMARDS | 24 | 71 | 66 | 64 |
| Comorbid conditions (non-RA patients in the family) (%) | ||||
| Asthma | 4 | 3 | 3 | 4 |
| Hypertension | 25 | 20 | 22 | 19 |
| Diabetes | 10 | 8 | 8 | 8 |
| Hyperlipidemia | 34 | 22 | 26 | 26 |
| Heart disease | 28 | 19 | 22 | 22 |
| Depression | 4 | 5 | 5 | 5 |
| Osteoarthritis | 8 | 5 | 8 | 6 |
| OOP spending (RA patient) | ||||
| Medical services | 3,291 (11,413) | 3,149 (14,894) | 3,352 (10,732) | 2,304 (11,698) |
| Pharmacy | 642 (1,849) | 1,293 (2,399) | 1,084 (2,823) | 1,378 (2,741) |
| RA drugs | 80 (312) | 694 (2,034) | 298 (877) | 805 (2,169) |
| OOP spending (non-RA patients in the family) | ||||
| Medical services | 2,207 (8,710) | 1,863 (7,391) | 1,610 (6,091) | 1,453 (6,061) |
| Pharmacy | 474 (1,352) | 521 (1,566) | 423 (765) | 437 (1,115) |
| Number of person-years | 17,713 | 1,629 | 1,352 | 3,257 |
DMARDS, disease-modifying antirheumatic drugs; HH, household; NSAID, nonsteroidal antiinflammatory drugs; OOP, out of pocket; RA, rheumatoid arthritis; SD, standard deviation.