Table 2. Patient Demographics.
| Factor | Group 1 (n = 20) | Group 2 (n = 20) | Confidence interval of the difference | p-value |
|---|---|---|---|---|
| Age (yr) | 56.0 ± 9.0 (45–68) | 56.9 ± 9.6 (42–70) | –6.6 to 3.3 | 0.480 |
| Sex (male/female) | 14/6 | 13/7 | –0.3 to 0.3* | 1.000 |
| Dominant/nondominant | 15/5 | 14/6 | –0.3 to 0.3+ | 1.000 |
| Preoperative BMI (kg/m2) | 23.7 ± 3.7 (18.0–28.0) | 24.9 ± 3.8 (16.0–31.0) | –1.8 to 2.3 | 0.841 |
| Preoperative height (cm) | 166.7 ± 9.7 (158.0–179.0) | 165.9 ± 9.9 (157.0–178.0) | –3.7 to 7.5 | 0.561 |
| Preoperative weight (kg) | 68.0 ± 14.5 (49.0–88.0) | 67.5 ± 14.0 (48.0–87.0) | –6.2 to 9.8 | 0.588 |
| Duration of symptom (mo) | 15.8 ± 16.7 (6.0–61.0) | 15.7 ± 27.0 (8.0–131.0) | –11.3 to 17.7 | 0.099 |
| Preoperative VAS score | 5.7 ± 2.3 (2.0–9.0) | 6.5 ± 1.9 (3.0–9.0) | –1.8 to 0.4 | 0.257 |
| Preoperative ASES score | 48.4 ± 15.1 (24.0–80.0) | 48.1 ± 16.5 (19.0–76.0) | –0.7 to 19.8 | 0.064 |
| Preoperative KSS score | 55.2 ± 15.5 (34.1–82.4) | 54.6 ± 14.3 (39.8–81.5) | –3.4 to 10.7 | - |
Values are presented as mean ± standard deviation (range). Data were analysed by the t-test for independent samples or the Mann-Whitney U-test according to the normality of data to investigate the differences of the mean values between group 1 and group 2 (p < 0.05).
Group 1: intraoperative suprascapular nerve block (SSNB) was performed under arthroscopic guidance in addition to preemptive SSNB and axillary block, Group 2: preoperative SSNB was performed without guidance, VAS: visual analog scale, BMI: body mass index, ASES: American Shoulder and Elbow Surgeons, KSS: Korean Shoulder Elbow Society.
*male: 1, female: 0. +dominant: 1, nondominant: 0.