TABLE 4.
N-back results pre- and post-HUT in ME/CFS patients with a mild, a moderate or a severe degree of ME/CFS.
| N-back results | Group 1 mild | Group 2 moderate | Group 3 severe | 2-way ANOVA and post hoc Holm–Sidak test |
| 2 Back test | n = 49 | n = 55 | n = 24 | |
| % Correct response pre-HUT | 81 (17) | 75 (18) | 74 (17) | F (2, 250) = 0.018; p = 0.98. |
| % Correct response post-HUT | 67 (22) | 60 (17) | 60 (20) | |
| Raw reaction time pre-HUT | 742 (185) | 803 (203) | 823 (160) | F (2, 250) = 0.41; p = 0.66. |
| Raw reaction time post-HUT | 907 (262) | 973 (228) | 936 (181) | |
| 3 Back test | ||||
| % Correct response pre-HUT | 60 (17) | 56 (16) | 56 (17) | F (2, 250) = 0.022; p = 0.98. |
| % Correct response post-HUT | 43 (17) | 40 (18) | 40 (14) | |
| Raw reaction time pre-HUT | 936 (177) | 973 (168) | 924 (158) | F (2, 250) = 0.0081; p = 0.99. |
| Raw reaction time post-HUT | 1086 (169) | 1125 (176) | 1081 (189) | |
Data represent mean (SD). Raw reaction time is in m/s. HUT: head-up tilt test.