Intra-rater reliability for continuous data

[sms1891]

Hi all,

I need help in calculating intra-rater reliability for continuous variable measured by one person at two different times. Basically these are teeth expander measurement differences. The same dentist measured the differences twice (AvdDiff_T1 and AvdDiff_T2) and I would like to know if there is any reliability in the measurements.  Any help with sas code for this would be greatly appreciated. 

Here is the data:

ID     AvgDiff_T1     AvgDiff_T2

1        -2.00             0.89

2        2.02              0.05

3        3.42              1.52

4        3.34              6.81

5        2.90              4.85

Thank you so much in advance!
Sat

[StatDave]

One possible statistic is the estimated correlation computed by PROC GEE using an exchangeable correlation structure for the clusters (dentists). 

data b; 
input ID     AvgDiff_T1     AvgDiff_T2;
y=avgdiff_t1; output;
y=avgdiff_t2; output;
datalines;
1        -2.00             0.89
2        2.02              0.05
3        3.42              1.52
4        3.34              6.81
5        2.90              4.85
;
proc gee; class id; model y=; repeated subject=id/type=exch; run;

[sms1891]

Hi all,

I need help in calculating intra-rater reliability for continuous variable measured by one person at two different times. Basically these are teeth expander measurement difference between two different techniques. The same dentist measured the differences twice (AvdDiff_T1 and AvdDiff_T2) and I would like to know if there is any reliability in the measurements.  Any help with sas code for this would be greatly appreciated. 

Here is the data:

ID     AvgDiff_T1     AvgDiff_T2

1        -2.00             0.89

2        2.02              0.05

3        3.42              1.52

4        3.34              6.81

5        2.90              4.85

Thank you so much in advance!
Sat

[Oligolas]

Hi,

did you have a look at the 3 first matches in google search?

https://support.sas.com/resources/papers/proceedings/proceedings/sugi30/180-30.pdf