Table 2 Number (percentage) of patients with versus without recovery according to the representative eight symptoms accompanying ME/CFS
|  | Total (n = 1226) | ME/CFS recovered | ME/CFS unrecovered | P-value |
|---|---|---|---|---|
Headache | 1162 (94.8) | 648 (55.8) | 514 (44.2) | < 0.001 |
 Recovered | 425 (36.6) | 314 (73.9) | 111 (26.1) |  |
 Unrecovered | 737 (63.4) | 334 (45.3) | 403 (54.7) |  |
Cervical pain or stiffness | 1071 (87.4) | 583 (54.4) | 488 (45.6) | < 0.001 |
 Recovered | 606 (56.6) | 414 (68.3) | 192 (31.7) |  |
 Unrecovered | 465 (43.4) | 169 (36.3) | 296 (63.7) |  |
Vertigo or dizziness | 528 (43.1) | 285 (54.0) | 243 (46.0) | < 0.001 |
 Recovered | 459 (86.9) | 272 (59.3) | 187 (40.7) |  |
 Unrecovered | 69 (13.1) | 13 (18.8) | 56 (81.2) |  |
Palpitation | 960 (78.3) | 502 (52.3) | 458 (47.7) | < 0.001 |
 Recovered | 595 (62.0) | 376 (63.2) | 219 (36.8) |  |
 Unrecovered | 365 (38.0) | 126 (34.5) | 239 (65.5) |  |
Dazzling | 979 (79.9) | 536 (54.7) | 443 (45.3) | < 0.001 |
 Recovered | 513 (52.4) | 341 (66.5) | 172 (33.5) |  |
 Unrecovered | 466 (47.6) | 195 (41.8) | 271 (58.2) |  |
Nausea or stomachache | 695 (56.7) | 378 (54.4) | 317 (45.6) | < 0.001 |
 Recovered | 508 (73.1) | 323 (63.6) | 185 (36.4) |  |
 Unrecovered | 187 (26.9) | 55 (29.4) | 132 (70.6) |  |
Fever of unknown etiology | 1045 (85.2) | 554 (53.0) | 491 (47.0) | < 0.001 |
 Recovered | 663 Z(63.4) | 479 (72.2) | 184 (27.8) |  |
 Unrecovered | 382 (36.6) | 75 (19.6) | 307 (80.4) |  |
Depression | 894 (72.9) | 470 (52.6) | 424 (47.4) | < 0.001 |
 Recovered | 733 (82.0) | 453 (61.8) | 280 (38.2) |  |
 Unrecovered | 161 (18.0) | 17 (10.6) | 144 (89.4) |  |