Table 1.
Preoperative demographics
| Variables | Group A (n = 50) | Group B (n = 50) | Group C (n = 50) | P Value |
|---|---|---|---|---|
| Age (y)* | 67.40 ± 3.34 | 66.90 ± 4.62 | 66.38 ± 3.38 | 0.414 |
| Gender‡ (M/F) | 32/18 | 33/17 | 30/20 | 0.818 |
| Weight (kg)* | 65.52 ± 4.99 | 65.22 ± 4.81 | 66.38 ± 3.84 | 0.423 |
| Hight (cm)* | 159.38 ± 6.76 | 158.06 ± 5.81 | 157.92 ± 6.86 | 0.465 |
| BMI (kg/m2)* | 25.85 ± 2.08 | 26.14 ± 1.98 | 26.70 ± 2.08 | 0.109 |
| ASA* | 1.98 ± 0.65 | 1.94 ± 0.65 | 2.02 ± 0.62 | 0.824 |
| Preop.Hb (g/L)* | 13.42 ± 0.55 | 13.45 ± 0.53 | 13.39 ± 0.56 | 0.858 |
| Preop.Hct (L/L)* | 39.84 ± 1.26 | 39.87 ± 1.17 | 39.74 ± 1.25 | 0.867 |
| Preop.CRP (mg/L)* | 3.23 ± 0.96 | 3.29 ± 0.76 | 3.25 ± 0.93 | 0.950 |
| Preop.IL-6 (pg/mL)* | 4.05 ± 1.10 | 4.15 ± 1.15 | 4.11 ± 0.47 | 0.859 |
| Preop. ROM* | 94.54 ± 3.40 | 93.90 ± 3.42 | 93.89 ± 4.15 | 0.594 |
| Preop. VAS* | 5.16 ± 0.68 | 5.32 ± 0.82 | 5.22 ± 0.68 | 0.542 |
| Duration of surgery (min)* | 66.84 ± 3.30 | 67.92 ± 3.30 | 68.02 ± 2.83 | 0.120 |
Abbreviations: y years, M male, F female, R right, L left, BMI body mass index, ASA American Society of Anesthesiologists, Preop preoperative, Hb hemoglobin, Hct hematocrit, CRP C-reactive protein, IL-6 interleukin 6, ROM range of motion, VAS visual analogue scale
P value indicates a significant difference among the groups
*was analyzed by the one-way ANOVA;
‡ was analyzed by the Pearson chi-square test or the Fisher exact test