Measures of Psychological Symptoms (4DSQ) and Sleep (SCL-90) in the 4 Subgroups at Baseline and After 12 Months
| Baseline | 12 Months | ||||
|---|---|---|---|---|---|
| Measure by Subgroup | Score, Mean (SD) | Elevated Score,aNo. (%) | Score, Mean (SD) | Elevated Score,aNo. (%) | Mean Change in Score (95% CI) |
| 4DSQ = Four-Dimensional Symptoms Questionnaire; SCL-90 = Symptom Checklist 90; CI = confidence interval. | |||||
| Note: 123 patients had a chronic course, 83 had a fast recovery, 122 had a slow recovery, and 154 had recurrent fatigue. | |||||
| a Cutoffs for elevations of 4DSQ scores and SCL-90 scores are as indicated in Table 2. | |||||
| b Not significant. | |||||
| Distress | |||||
| Chronic course | 15.8 (7.3) | 93 (76) | 13.1 (7.7) | 70 (58) | 2.6 (1.4–3.9) |
| Fast recovery | 9.5 (6.4) | 33 (40) | 3.7 (3.9) | 6 (7.3) | 5.8 (4.5–7.2) |
| Slow recovery | 13.8 (7.3) | 78 (64) | 7.3 (5.6) | 31 (26) | 6.5 (5.3–7.7) |
| Recurrent fatigue | 12.7 (6.9) | 90 (59) | 9.1 (6.2) | 56 (38) | 3.6 (2.5–4.8) |
| Somatization | |||||
| Chronic course | 13.6 (6.9) | 79 (64) | 11.6 (6.6) | 68 (57) | 2.1 (1.1–3.0) |
| Fast recovery | 8.1 (5.0) | 21 (25) | 3.8 (3.6) | 4 (4.9) | 4.3 (3.3–5.2) |
| Slow recovery | 11.2 (5.4) | 63 (52) | 6.7 (5.4) | 21 (17) | 4.5 (3.7–5.4) |
| Recurrent fatigue | 10.5 (5.6) | 67 (44) | 7.9 (5.3) | 43 (29) | 2.6 (1.7–3.4) |
| Depression | |||||
| Chronic course | 2.6 (3.2) | 46 (37) | 2.2 (3.0) | 43 (36) | 0.41 (–0.1 to 0.9)b |
| Fast recovery | 0.9 (2.1) | 13 (16) | 0.1 (0.5) | 1 (1.2) | 0.83 (0.4–1.3) |
| Slow recovery | 1.4 (2.2) | 28 (23) | 0.5 (1.3) | 8 (6.6) | 0.82 (0.5–1.2) |
| Recurrent fatigue | 1.3 (2.0) | 29 (19) | 0.8 (2.0) | 16 (11) | 0.48 (0.2–0.8) |
| Anxiety | |||||
| Chronic course | 3.4 (4.3) | 20 (16) | 2.9 (3.9) | 13 (11) | 0.53 (−0.1 to 1.2)b |
| Fast recovery | 1.1 (1.9) | 2 (2.4) | 0.4 (1.0) | 0 (0) | 0.66 (0.3–1.0) |
| Slow recovery | 2.6 (3.4) | 13 (11) | 1.4 (2.3) | 4 (3.3) | 1.20 (0.7–1.7) |
| Recurrent fatigue | 2.3 (3.5) | 15 (9.7) | 1.8 (3.4) | 8 (5.4) | 0.50 (0.0–1.0) |
| Sleep | |||||
| Chronic course | 7.4 (3.4) | 80 (66) | 7.5 (3.1) | 90 (73) | 0.16 (−0.6 to 0.3)b |
| Fast recovery | 6.0 (2.8) | 43 (52) | 5.1 (2.1) | 36 (43) | 0.88 (0.2–1.5) |
| Slow recovery | 7.7 (3.3) | 91 (75) | 6.2 (2.4) | 67 (55) | 1.50 (1.0–2.0) |
| Recurrent fatigue | 6.7 (3.0) | 96 (62) | 6.5 (2.6) | 91 (59) | 0.25 (−0.2 to 0.7)b |