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Table 1 Characteristics of the study populations

From: The non-synonymous SNP, R1150W, in SCN9A is not associated with chronic widespread pain susceptibility

Cohort

Framingham

EMAS

EPIFUND

DSDBAC

Country

USA

Pan-European

UK

UK

Pain assessment

Homunculus

Manikin

Manikin

Manikin

Casesa

    

 N subjects (%)

572 (15)

208 (8)

197 (18)

94 (16)

 Age, years mean (SD)

60.4 (11.4)

60.5 (10.9)

51.1 (9.0)

79.6 (4.7)

 Gender (% female)

M/F (67)

M

M/F (72)

M/F (86)

Controlsb

    

 N subjects (%)

1587 (41)

973 (39)

395 (35)

259 (43)

 Age, years mean (SD)

57.9 (13.1)

59.7 (10.9)

48.2 (10.3)

80.5 (5.7)

 Gender (% female)

M/F (51)

M

M/F (55)

M/F (71)

  1. a cases are subjects with chronic widespread pain (ACR criteria) except Framingham which is widespread pain; b controls are pain-free subjects.