Table 5

Demographics of clinical sample by illness classification
CFS ISF Exclusion condition Total
n (%) n (%) n (%) n (%)
Sex
 Female 33 (89) 13 (72) 47 (96) 93 (89)
 Male 4 (11) 5 (28) 2 (4) 11 (11)
Age
 Adolescent (<18) 1 (3) 3 (16) 1 (2) 5 (5)
 18-20 0 0 3 (6) 3 (3)
 21-30 3 (8) 3 (16) 2 (4) 8 (8)
 31-40 9 (24) 3 (16) 5 (11) 17 (16)
 41-50 6 (16) 1 (6) 8 (16) 15 (14)
 51-60 12 (32) 6 (33) 19 (39) 37 (36)
 61-70 6 (16) 2 (11) 11 (22) 19 (18)
Race
 White 33 (89) 18 (100) 40 (82) 91 (88)
 Black 3 (8) 0 7 (14) 10 (10)
 Other 1 (3) 0 2 (4) 3 (3)
Education
 1st through 8th grade 0 2 (11) 0 2 (2)
 Some high school 3 (8) 2 (11) 5 (10) 10 (10)
 High school graduate 5 (13) 1 (6) 8 (16) 14 (13)
 Trade/Technical/Vocational after
 High School 3 (8) 0 9 (18) 12 (12)
 Some college 6 (16) 3 (17) 13 (27) 22 (21)
 Two-year college graduate 6 (16) 4 (22) 5 (10) 15 (14)
 Four-year college graduate 6 (16) 4 (22) 2 (4) 12 (12)
 Postgraduate 6 (16) 2 (11) 5 (10) 13 (12)
 Other 2 (5) 0 2 (4) 4 (4)
BMI
 ≤18 2 (5) 2 (11) 0 4 (4)
 19-24 12 (32) 5 (26) 15 (31) 32 (31)
 25-30 16 (43) 7 (58) 21 (43) 44 (42)
 31-39 8 (22) 4 (21) 13 (27) 25 (24)
Previous CFS Diagnosisa
 Yes 20 (54) 10 (56) 27 (56) 57 (55)
 No 16 (43) 5 (28) 21 (44) 42 (40)
Total 37 18 49 104

aExcludes adolescent patients (n = 5).

Brimmer et al.

Brimmer et al. BMC Research Notes 2013 6:309   doi:10.1186/1756-0500-6-309

Open Data