|
Intraclass correlations (ICC) and measures of bias for selected continuous and ordinal variables. |
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| Difference between ratings† |
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|
|
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| Variable (units) (Item Number) |
N* |
ICC |
(95% LCL) |
Mean |
SD‡ |
P |
|
|
||||||
| Age (years) (1.1) |
104 |
0.98 |
(0.96) |
-0.11 |
3.19 |
0.957 |
| Stroke onset time (mins) (6.2) § |
19 |
0.99 |
(0.99) |
-10.00 |
29.72 |
0.903 |
| ED arrival time (mins) (4.1) |
78 |
0.87 |
(0.82) |
16.55 |
168.07 |
0.775 |
| Time first seen by doctor (mins) (4.2) |
49 |
0.88 |
(0.82) |
22.14 |
160.26 |
0.770 |
| Initial brain imaging time (mins) (5.2) |
30 |
0.93 |
(0.89) |
-19.97 |
111.67 |
0.809 |
| Total Cholesterol (mg/dL) (12.9) |
35 |
0.91 |
(0.86) |
4.29 |
22.03 |
0.705 |
| HDL (mg/dL) (12.9) |
33 |
0.99 |
(0.99) |
0.33 |
1.34 |
0.916 |
| LDL (mg/dL) (12.9) |
28 |
1.00 |
0.00 |
0.00 |
1.000 |
|
| Modified Rankin at discharge (Score) (12.6) |
99 |
0.80 |
(0.73) |
-0.01 |
1.10 |
0.968 |
|
*Where both prototype and audit data have values. †Calculated as audit abstractor minus hospital abstractor. ‡Standard deviation of the difference. §Where both auditor and prototype raters recorded onset time as specific. 95% LCL = 95% Lower Confidence Limit. P = T-test probability. | ||||||
Reeves et al. BMC Neurology 2008 8:19 doi:10.1186/1471-2377-8-19 |
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