Table IV. Estimates of the odds ratio (OR) by operator ordered from the worst to the best performer.

Operator ID	OR	OR 95% CI
27	0.8626	0.7304–0.9677
6	0.9069	0.7549–1.0668
22	0.9093	0.7818–1.0366
31	0.9314	0.7969–1.0769
8	0.9444	0.7882–1.1237
20	0.9477	0.7710–1.1576
21	0.9477	0.7920–1.1956
7	0.9644	0.7767–1.1942
5	0.9670	0.7844–1.1895
15	0.9738	0.7846–1.2069
29	0.9755	0.7938–1.1975
10	0.9768	0.7929–1.2018
14	0.9779	0.8812–1.0842
16	0.9811	0.8624–1.1152
3	0.9837	0.7931–1.2195
32	0.9863	0.7953–1.2227
12	0.9950	0.8251–1.1998
30	0.9971	0.9209–1.0796
2	1.0148	0.9341–1.1024
13	1.0169	0.8250–1.2534
26	1.0204	0.8412–1.2378
28	1.0312	0.8509–1.2497
18	1.0335	0.8342–1.2804
25	1.0340	0.9334–1.1453
11	1.0342	0.9269–1.1538
24	1.0422	0.8453–1.2849
23	1.0884	0.8883–1.3337
9	1.0897	0.9274–1.2804
19	1.0984	0.9006–1.3396
4	1.1159	0.9512–1.3091
17	1.1276	1.0201–1.2464
1	1.1278	0.9455–1.3453

The OR expresses the ratio between the odds of success of the single operator and the average odds of success.