Table 2.
Demographic characteristics by cohort
| Characteristic | Total, n = 448 | Adherent cohort (MPR ≥ 80%), n = 344 | Nonadherent cohort (MPR < 80%), n = 104 | P value |
|---|---|---|---|---|
| Age, years | ||||
| Mean (SD) | 42.6 (14.8) | 42.4 (14.9) | 43.3 (14.2) | |
| Median | 43 | 42 | 45 | 0.48 |
| Sex, n (%) | ||||
| Female | 251 (56) | 199 (58) | 52 (50) | |
| Male | 197 (44) | 145 (42) | 52 (50) | 0.16 |
| Payer type, n (%) | N/A | |||
| Commercial plan | 424 (95) | 325 (94) | 99 (95) | |
| Medicaid | 2 (<1) | 1 (<1) | 1 (1) | |
| Medicare risk | 10 (2) | 10 (3) | 0 (0) | |
| Self-insured | 12 (3) | 8 (2) | 4 (4) | |
| Region, n (%) | 0.33 | |||
| Northeast | 69 (15) | 48 (14) | 21 (20) | |
| Midwest | 187 (42) | 149 (43) | 38 (37) | |
| South | 132 (29) | 103 (30) | 29 (28) | |
| West | 60 (13) | 44 (13) | 16 (15) | |
| First infliximab infusion place of service, n (%) | N/A | |||
| Outpatient office | 295 (66) | 234 (68) | 61 (59) | |
| Outpatient hospital | 60 (13) | 45 (13) | 15 (14) | |
| Inpatient hospital | 48 (11) | 34 (10) | 14 (13) | |
| Unknown | 30 (7) | 22 (6) | 8 (8) | |
| All other POS codes | 15 (3) | 9 (3) | 6 (6) | |
Abbreviations: MPR, medication possession ratio; N/A, not applicable; POS, place of service; SD, standard deviation.