Table 2 Individual reviewer and aggregate scores for pre- and postoperative ultrasound examination of brachial plexus
Mean | Mean | Mean | ||||
|---|---|---|---|---|---|---|
Reviewer | N | Pre-op | Post-op | Difference | p-value | |
Quality of ultrasound visualization | 1 | 29 | 4.4 | 3.7 | −0.7 | 0.006 |
2 | 29 | 4.7 | 3.9 | −0.8 | < 0.001 | |
3 | 29 | 4.5 | 3.8 | −0.8 | < 0.001 | |
Aggregate Mean | 29 | 4.5 | 3.8 | − 0.7 | < 0.001 | |
Confidence in performing ISB | 1 | 29 | 4.8 | 4.1 | −0.8 | < 0.001 |
2 | 29 | 4.9 | 4.2 | −0.7 | < 0.001 | |
3 | 29 | 4.8 | 4.3 | −0.5 | 0.009 | |
Aggregate Mean | 29 | 4.8 | 4.2 | −0.7 | < 0.001 |