TABLE 2

Characteristics of study population

Subject characteristicCFS/ME cases (n = 147)Controls (n = 146)
Age (years, mean ± SD)51.9 ± 10.150.6 ± 10.1
Sex [no. of males (%)]33 (22.4)32 (21.9)
Ethnicity [no. (%)]  
 Caucasian139 (95.0)137 (93.8)
 Asian1 (0.7)2 (1.4)
 Hispanic7 (4.8)7 (4.8)
 African-American0 (0)0 (0)
Illness onset (years, mean ± SD)35.5 ± 10.1NAa
Illness duration (years, mean ± SD)15.9 ± 8.5NA
Vitality score (mean ± SD)b8.3 ± 9.983.9 ± 11.6
  • a NA, not applicable.

  • b Scale is 0 to 100.