Skip to main content

Table 2 Intraclass correlations (ICC) and measures of bias for selected continuous and ordinal variables.

From: Inter-rater reliability of data elements from a prototype of the Paul Coverdell National Acute Stroke Registry

    

Difference between ratings†

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

  1. *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.