Table 1 Demographic data for the juvenile primary fibromyalgia syndrome cohort and other rheumatic disease cohort

Age (years)*

M = 15.5, SD = 2.2 (range 9–20)

M = 13.0, SD = 4.0 (range 5–21)

Sex*

84% female

72% female

Race

85% White

80% White

8% Black/AA

10% Black/AA

2% Asian

1% American Indian or

3% Asian

1% American Indian or

Alaskan Native

Alaskan Native

4% Other

6% Other

Ethnicity

17% Hispanic

13% Hispanic

Median family income interval

$75–$100,000

$50–$75,000

Age at symptom onset (years)*

M = 12.1, SD = 3.1 (range 2–18)

M = 8.3, SD = 4.7 (range 0.2–21)

Age at first rheumatologist visit (years)*

M = 13.7, SD = 2.8 (range 3–20)

M = 9.2, SD = 4.7 (range 0.2–21)

Body mass index*

M = 24.1, SD = 6.0 (range 13.7–50.7)

M = 21.2, SD = 5.8 (range 11.1–53.0)

Family history of fibromyalgia*

18% yes

4% yes

Family history of autoimmune disease*

45% yes

31% yes