Age (years): mean (SD) n = 566
|
15.7 (1.7)
|
16.4 (1.6)
|
15.8 (1.7)
|
16.3(1.1)
|
15.3 (1.5)
|
15.4 (1.7)
|
15.3(1.7)
|
Chronic pain: n (%) n = 560
|
393/560 (70.2)
|
67/85 (78.8)
|
113/148 (76.4)
|
16/22 (72.7)
|
22/37 (59.5)
|
141/216 (65.9)
|
34/54 (63.0)
|
- Headache/Migraine: n (%) n = 551
|
226/551 (41.0)
|
48/84 (57.1)
|
72/144 (50.0)
|
9/22 (40.9)
|
9/36 (25.0)
|
70/216 (33.2)
|
18/54 (33.3)
|
- Musculoskeletal pain: n (%) n = 560
|
323/560 (57.7)
|
56/85 (65.9)
|
95/148 (64.2)
|
9/22 (40.9)
|
18/37 (48.6)
|
118/216 (55.1)
|
27/54 (50.0)
|
- Abdominal pain: n (%) n = 551
|
187/551 (33.9)
|
38/84 (45.2)
|
61/144 (42.4)
|
12/22 (54.5)
|
8/36 (22.2)
|
50/216 (23.7)
|
18/54 (33.3)
|
Multisite pain: n (%) n = 560
|
209/560 (37.3)
|
45/85 (52.9)
|
64/148 (43.2)
|
8/22 (36.4)
|
8/37 (21.6)
|
67/216 (31.3)
|
17/54 (31.5)
|
Subjective Disability Index: n (%) n = 564
|
125/564 (22.2)
|
32/85 (37.6)
|
36/148 (24.3)
|
3/22 (13.6)
|
4/39 (10.3)
|
45/216 (20.8)
|
5/54 (9.3)
|