Table 1

Demographic characteristics of patients undergoing bilateral or unilateral total knee arthroplasty

CharacteristicUTKA, n = 966BTKA, n = 373p valueOR (95% CI)
Sex
 Male, no. (%)329 (34.1)108 (29.0)0.081.3 (1.0–1.6)
 Female, no. (%)637 (65.9)265 (71.0)0.080.8 (0.6–1.0)
Age, mean ± SD yr69.6 ± 10.269.1 ± 9.10.261.01 (0.99–1.02)
BMI, mean ± SD32.5 ± 7.032.2 ± 6.00.381.01 (0.99–1.03)
Smoking, no. (%)86 (8.9)24 (6.2)0.121.4 (0.9–2.3)
  • BMI = Body Mass Index; BTKA = bilateral total knee arthroplasty; CI = confidence interval; OR = odds ratio; SD = standard deviation; UTKA= unilateral total knee arthroplasty.