topic Intra-rater reliability for continuous data in Statistical Procedures

Intra-rater reliability for continuous data

sms1891 — Mon, 11 Oct 2021 21:36:57 GMT

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

Intra-rater reliability for continuous data

sms1891 — Mon, 11 Oct 2021 21:33:37 GMT

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

Re: Intra-rater reliability for continuous data

StatDave — Mon, 11 Oct 2021 22:10:41 GMT

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;

Re: Intra-rater reliability for continuous data

Oligolas — Mon, 11 Oct 2021 22:42:15 GMT

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