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Table 1 Distribution of demographic variables by CFS case-control status among persons from the combined Wichita and Georgia case-control population-based studies.

From: Absence of evidence of Xenotropic Murine Leukemia Virus-related virus infection in persons with Chronic Fatigue Syndrome and healthy controls in the United States

  CFS Well  
Demographic Factor Wichita, KS (N = 11) Atlanta, GA (N = 22) Wichita, KS (N = 26) Atlanta, GA (N = 30) p-value2,3,4
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. 1. SEM, standard error of the mean
  2. 2. t-test was used to compute probabilities for comparisons of mean age and mean body mass index between study groups.
  3. 3. Chi square test was used to compute the probability for comparison of the distribution of sex between cases and controls.
  4. 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.