Table 1.
Demographics and Baseline Evaluations
| 5 mL (N = 12) | 10 mL (N = 12) | 20 mL (N = 12) | P value | |
|---|---|---|---|---|
| Age (mean in yr ± SEM; 95%CI) | 51 ± 4; 42-60 | 55 ± 3.7; 46-63 | 50.5 ± 3.3; 43-58 | > 0.72 |
| Sex (M/F) | 7/5 | 9/3 | 9/3 | > 0.78 |
| BMI(mean in kg/m2 ± SEM; 95%CI) | 29 ± 2; 25-33.4 | 28 ± 0.9; 26-30 | 29 ± 1.9; 25-33 | > 0.82 |
| ASA status (1/2/3) | 2/8/2 | 0/12/0 | 3/8/1 | > 0.512 |
| Baseline Pain (median NRS: 0-10; 95%CI) | 2; 0.7-4.5 | 2; 0.6-2.6 | 2; 0.8-2.3 | > 0.52 |
| Dominant hand (R/L) | 12/0 | 10/2 | 11/1 | > 0.22 |
| Operative side (R/L) | 9/3 | 7/5 | 7/5 | > 0.52 |
| Baseline Function (SST median; 95%CI) | 7; 4.5-9.5 | 5; 3.5-7.8 | 7; 4.2-8.4 | > 0.50 |
| Baseline diaphragmatic excursion: right (mean ± SEM; 95%CI) | 4.5 ± 0.7; 3.0-6.0 | 4.5 ± 0.6; 3.1-5.9 | 4.6 ± 0.7; 3.1-6.1 | > 0.90 |
| Baseline diaphragmatic excursion: left (mean ± SEM; 95%CI) | 4.1 ± 0.5; 3.0-5.2 | 4.5 ± 0.5; 3.4-5.7 | 4.2 ± 0.4; 3.3-5.1 | > 0.81 |
SEM: Standard Error of the Mean; 95%CI: 95% Confidence Interval; BMI: Body Mass Index; ASA: American Society of Anesthesiologists; NRS: numeric rating scale; SST: Simple Shoulder Test