Table 2.
Adolescent demographic and disease characteristics.
| Characteristic | Total (N=219) | Intervention (n=88) | Control (n=131) | ||||
| Age (years), mean (SD) | 14.4 (1.6) | 14 (1.5) | 14.5 (1.7) | ||||
| Sex, n (%) | |||||||
|
|
Female | 154 (70.3) | 63 (72) | 91 (69.5) | |||
|
|
Male | 65 (29.7) | 25 (28) | 40 (30.5) | |||
| Language, n (%) | |||||||
|
|
English | 214 (97.7) | 87 (99) | 127 (96.9) | |||
|
|
French | 5 (2.3) | 1 (1) | 4 (3.1) | |||
| Annual household income (Can $), n (%)a | |||||||
|
|
Less than $25,000 (US $18,263) | 9 (4.6) | 2 (3) | 7 (5.7) | |||
|
|
$25,000-49,999 (US $18,263-US $36,526) | 25 (12.7) | 9 (12) | 16 (13.1) | |||
|
|
$50,000-74,999 (US $36,526-US $54,790) | 28 (14.2) | 6 (8) | 22 (18.0) | |||
|
|
$75,000-99,999 (US $54,790-US $73,053) | 29 (14.7) | 13 (17) | 16 (13.1) | |||
|
|
$100,000-150,000 (US $73,053-US $109,580) | 33 (16.8) | 12 (16) | 21 (17.2) | |||
|
|
Did not answer | 44 (22.3) | 18 (24) | 26 (21.3) | |||
| JIAb category, n (%) | |||||||
|
|
Systemic | 5 (2.3) | 1 (1) | 4 (3.1) | |||
|
|
Oligoarthritis | 47 (21.5) | 21 (24) | 26 (19.8) | |||
|
|
Oligoarthritis—extended | 24 (10.9) | 9 (10) | 15 (11.5) | |||
|
|
Polyarthritis (RF-) | 50 (22.8) | 23 (26) | 27 (20.6) | |||
|
|
Polyarthritis (RF+) | 19 (8.7) | 5 (6) | 14 (10.7) | |||
|
|
Psoriatic arthritis | 23 (10.5) | 9 (10) | 14 (10.7) | |||
|
|
Enthesitis-related arthritis | 35 (16.0) | 13 (15) | 22 (16.7) | |||
|
|
Undifferentiated | 9 (4.1) | 3 (3) | 6 (4.6) | |||
|
|
Other | 7 (3.2) | 4 (5) | 3 (2.3) | |||
| Disease severity, n (%) | |||||||
|
|
Low (0-3 PGA)c | 181 (82.6) | 75 (85) | 106 (80.9) | |||
|
|
Moderate to severe (4-10 PGA) | 38 (17.4) | 13 (15) | 25 (19) | |||
| Duration of illness (years), mean (SD) | 5.7 (4.6) | 6 (5) | 5.6 (4.6) | ||||
| Expectation about intervention effectiveness at baseline | 6.1 (2.1) | 6 (2) | 5.9 (2.0) | ||||