Table 1.
Preoperative demographics and preoperative PROs for patients included and excluded in the study and the TKA/OA patients in the SKAR 2013–2015. Values are mean (95% CI) unless otherwise specified
| Variable | Included (n = 3,327) | Excludeda (n = 991) | p-value | SKAR (n = 35,932) |
|---|---|---|---|---|
| Women, n (%) | 1,912 (58) | 593 (60) | 0.2 | 20,389 (57) |
| Age | 69 (69–70) | 69 (69–70) | 1.0 | 69 (69–69) |
| BMI | 29 (29–29) | 29 (29–29) | 0.02 | 29 (29–29) |
| ASA ≥ 3, n (%) | 513 (15) | 186 (19) | 0.01 | 6,035 (17) |
| KOOS | n = 509 | |||
| pain | 41 (40–41) | 38 (37–39) | < 0.001 | |
| symptoms | 48 (47–49) | 45 (43–46) | < 0.001 | |
| ADL | 46 (46–47) | 43 (42–44) | < 0.001 | |
| sport/rec | 12 (12–13) | 11 (10–12) | 0.07 | |
| QoL | 24 (23–24) | 20 (19–22) | < 0.001 | |
| EQ-VAS | n = 527 | |||
| 70 (69–70) | 64 (6–66) | < 0.001 |
a
Excluded or lost to follow-up.
BMI = body mass index, ASA = American Society of Anesthesiologists, KOOS = Knee injury and Osteoarthritis Outcome Score, ADL = activity in daily life function, Sport/rec = sport and recreation function, QoL = quality of life, VAS = visual analogue scale.