Table 1 Demographic data of ME/CFS patients with a normal HR and BP response (group 1), ME/CFS patients with POTS (group 2), and ME/CFS patients with dOH (group as observed during HUT), all with a significant CBF decrease as measured during HUT
|  | Group 1 NormHRBP (n = 105) | Group 2 POTS (n = 39) | Group 3 dOH (n = 27) | Ordinary one-way ANOVA with post hoc Tukey’s test |
|---|---|---|---|---|
Male/female | 21/84 | 10/29 | 5/22 | Chi-square test: p = 0.72 (2 × 4 table) |
Age (years) | 41 (9) | 38 (11) | 43 (12) | F (2, 168) = 1.99; p = 0.14 |
Height (cm) | 171 (8) | 175 (10) | 173 (9) | F (2, 168) = 2.39; p = 0.09 |
Weight (kg) | 73 (16) | 75 (14) | 73 (14) | F (2, 168) = 0.31; p = 0.73 |
BMI (kg/m2) | 24.9 (4.8) | 24.6 (3.8) | 24.5 (5.3) | F (2, 168) = 0.08; p = 0.92 |
BSA (m2) | 1.85 (0.20) | 1.90 (0.21) | 1.86 (0.17) | F (2, 168) = 1.02; p = 0.36 |
Disease duration (yrs) | 11 (5–16.5) | 7 (4–13) | 11 (4–18) | Kruskal–Wallis test: X2 = 4.21; p = 0.12 |