Interobserver variability, and intraclass correlation coefficient as per modified Rodnan skin score (MRSS-51)
| Interobserver variability | ||||||||
|---|---|---|---|---|---|---|---|---|
| Study | No of patients | No of patients per investigator | No of investigators | Mean | Within-patient SD | Coefficient of variation % | Intraclass correlation coefficient | |
| Tutors | ||||||||
| Berlin, 2004 | 15 | 8–15 | 9 | 8.6 | 4.2 | 50 | 0.865 | |
| Budapest, 2005 | 18 | 6–8 | 9 | 18.1 | 7.5 | 41 | 0.530 | |
| Vienna, 2005 | 11 | 9–11 | 6 | 16.3 | 5.7 | 34.6 | 0.710 | |
| Students | ||||||||
| Budapest, 2005 | 18 | 2 | 90 | 15.4 | 5.4 | 35 | 0.378 | |
| Repeated investigations | ||||||||
| Pécs, 2005 Apr | 6 | 6 | 9 | 15.7 | 8.5 | 54 | 0.496 | |
| Pécs, 2005 June | 7 | 7 | 5 | 12 | 3.8 | 32 | 0.722 | |
| Previous studies | ||||||||
| Harrison et al12 | 12 | 12 | 3 | – | – | – | 0.67 | |
| Brennan et al9 | 12 | 12 | 6 | 18.3 | 4.6 | 25 | 0.87 | |
| Silman et al10 | 8 | 8 | 16 | – | – | – | 0.72 | |
| Clements et al13 | 0.92 | |||||||
| Clements et al7 | 20 | 5–6 | 23 | 17.7 | 4.6 | 25 | – | |
| Intraobserver variability | ||||||||
|---|---|---|---|---|---|---|---|---|
| No of patients | No of patients per investigator | No of investigators | No of investigations | Overall mean | Overall within-patient SD | Coefficient of variation % | Mean of intraclass correlation coefficients for investigators | |
| Comparison with previous investigations is also depicted. | ||||||||
| *The number of investigators who previously participated in the Budapest course is in parentheses. | ||||||||
| Pécs, 2005 April | 6 | 6 | 9 (3)* | 3 | 13.9 | 2.9 | 20 | 0.74 |
| Pécs, 2005 June | 7 | 7 | 5 (3)* | 3 | 12.3 | 2.5 | 20.4 | 0.76 |
| Previous studies | ||||||||
| Clements et al7 | 55 | 3 | 21 | 3 | 20.7 | 2.45 | 11.8 | – |