Table 2.
Clinical Characteristics of Knee Arthroplasty Patients with and without Sleep Apnea
| Characteristic | No Sleep Apnea (N=91) |
Sleep Apnea (N=15) |
p-Value* |
|---|---|---|---|
| Age ± SD | 74 ± 5.1 | 70.3 ± 3.3 | 0.0111 |
| Female Sex, n (%) | 52 (57.1) | 7 (46.7) | 0.5768 |
| Caucasian, n (%) | 83 (91.2) | 13 (88.7) | 0.6309 |
| ASA1 Score=3 (vs 2), n (%) | 52 (57.1) | 11 (73.3) | 0.2715 |
| MMSE4 ± SD | 29.1 ± 1.4 | 29.4 ± 0.8 | 0.5244 |
| Education (years) ± SD | 14.8 ± 3.2 | 14.9 ± 2.5 | 0.7717 |
| Received General Anesthesia, n (%) | 33 (36.2) | 6 (40) | 0.9999 |
| Procedure on Left Knee, n (%) | 46 (50.6) | 10 (66.7) | 0.2780 |
| TKA5 Revision Procedure, n (%) | 6 (6.6) | 2 (13.3) | 0.3156 |
| Body Mass Index (Kg/M2) ± SD | 30.5 ± 6.8 | 36.1 ± 7.9 | 0.0047 |
| Preop Hemoglobin (g/dl) ± SD | 13.2 ± 1.5 | 13.6 ± 1.8 | 0.3717 |
| Preop Oxygen Saturation (%) ± SD | 96.9 ± 1.7 | 96.9 ± 1 | 0.7648 |
| Number of Preop Comorbidities ± SD | 2.9 ± 1.6 | 3.9 ± 2.5 | 0.0074 |
| Coronary Artery Disease, n (%) | 15 (16.5) | 3 (20) | 0.9999 |
| Diabetes, n (%) | 11 (12.1) | 3 (20) | 0.4146 |
| Hypertension, n (%) | 67 (73.6) | 14 (93.3) | 0.1137 |
| Hyperlipidemia, n (%) | 38 (41.8) | 9 (60) | 0.2627 |
| BPH2, n (%) | 16 (17.6) | 1 (6.7) | 0.4561 |
| Incontinence, n (%) | 14 (15.4) | 1 (6.7) | 0.4681 |
| GERD3, n (%) | 30 (33) | 7 (46.7) | 0.3824 |
*
p-Value from Wilcoxon Rank Sum test comparing Sleep Apnea Groups
1
American Society of Anesthesiologists
2
Benign prostatic hyperplasia
3
Gastroesophageal reflux disorder
4
Mini-mental state examination
5
Total Knee Arthroplasty