Table 3 Consistency and degree of change between baseline and follow-up for individual measures
From: Longitudinal stability of fibromyalgia symptom clusters
| Â | Â | Mean (SD) value | Mean (95% CI) paired difference | Number of patients (%) | |||
|---|---|---|---|---|---|---|---|
Measure | ICC | Baseline | Follow-up | Worsened by ≥ 30% | Within 30% of baseline at follow-up | Improved by ≥ 30% | |
Cluster analysis measures | |||||||
 MFI | 0.61 | 15.7 (3.6) | 15.2 (3.7) | −0.54 (−0.85, −0.23) | 44 (10) | 346 (80) | 43 (10) |
 MOS-Sleep | 0.66 | 55.2 (18.9) | 55.4 (19.1) | 0.20 (−1.29, 1.69) | 77 (18) | 304 (70) | 52 (12) |
 BPI severity | 0.62 | 5.1 (1.8) | 5.0 (1.8) | −0.11 (−0.26, 0.03) | 79 (18) | 285 (66) | 69 (16) |
 FIQR function | 0.72 | 14.0 (7.2) | 13.7 (7.4) | −0.30 (−0.82, 0.22) | 106 (24) | 226 (52) | 97 (22) |
 FIQR stiffness | 0.23 | 7.2 (2.2) | 6.6 (2.4) | −0.62 (−0.85, −0.40) | 53 (12) | 287 (66) | 90 (21) |
 MASQ | 0.80 | 95.1 (21.8) | 93.7 (22.3) | −1.4 (−2.7, −0.05) | 19 (4) | 405 (94) | 9 (2) |
 POMS depression-dejection | 0.61 | 6.6 (5.0) | 6.3 (4.9) | −0.25 (−0.67, 0.16) | 128 (30) | 172 (40) | 133 (31) |
 POMS tension-anxiety | 0.60 | 7.0 (4.6) | 7.2 (4.7) | 0.15 (−0.24, 0.55) | 131 (30) | 198 (46) | 104 (24) |
Global measures not included in cluster analysis | |||||||
 FIQR total (n = 410) | 0.75 | 55.4 (19.0) | 53.9 (19.9) | −1.50 (−2.84, −0.17) | 59 (14) | 300 (73) | 51 (12) |
 SF-36 physical (n = 380) | 0.69 | 30.3 (8.7) | 31.0 (8.6) | 0.76 (0.07, 1.44) | 19 (5) | 305 (80) | 56 (15) |
 SF-36 mental (n = 380) | 0.60 | 40.6 (12.3) | 40.2 (12.7) | −0.37 (−1.50, 0.75) | 47 (12) | 267 (70) | 66 (17) |
 FM Research Survey Criteria, WPI | 0.47 | 12.6 (3.8) | 12.1 (4.0) | −0.58 (−0.20, −0.95) | 75 (17) | 272 (63) | 86 (20) |
 FM Research Survey Criteria, SS | 0.57 | 8.8 (2.0) | 8.2 (2.3) | −0.63 (−0.43, −0.81) | 31 (7) | 344 (80) | 57 (13) |