Table 1

Distribution of demographic variables by CFS case-control status among persons from the combined Wichita and Georgia case-control population-based studies.

CFS

Well

Demographic Factor

Wichita, KS

(N = 11)

Atlanta, GA

(N = 22)

Wichita, KS

(N = 26)

Atlanta, GA

(N = 30)

p-value^2,3,4

Age

Mean ± SEM¹

46.7 ± 3.32

47.7 ± 4.69

51.6 ± 5.1

46.1 ± 5.48

p = 0.51

Sex [n (%)]

Female

8 (72.7)

20 (90.9)

21 (80.8)

25 (83.3)

p = 0.74

Male

3 (27.3)

2 (9.1)

5 (19.2)

5 (16.7)

Race [n (%)]

White

10 (90.9)

18 (81.8)

25 (96.2)

27 (90)

Black

0 (0)

3 (13.6)

1 (3.8)

3 (10)

p = 0.69

Other

1 (9.1)

1 (4.6)

0

0 (0)

Body Mass Index

Mean ± SEM

27.6 ± 3.3

28.2 ± 4.7

29.2 ± 5.1

26.3 ± 5.5

p = 0.76

1. SEM, standard error of the mean

2. t-test was used to compute probabilities for comparisons of mean age and mean body mass index between study groups.

3. Chi square test was used to compute the probability for comparison of the distribution of sex between cases and controls.

4. Fisher's exact test was used to compute the probability for comparison of the distribution of race between the study groups, and was based on Blacks and Whites only.

Switzer et al. Retrovirology 2010 7:57   doi:10.1186/1742-4690-7-57