Skip to main content

Table 2 Comparisons of baseline characteristics between groups. The Kruskal-Wallis test was used to compare all variables except gender which was compared with the Fisher’s exact test. Mean (SD) and Median (IQR) values for patient reported outcome measures are shown

From: The clinical outcomes of cementless unicompartmental knee replacement in patients with reduced bone mineral density

ParameterNormal boneOsteopenic boneOsteoporotic boneDifferences between groups for parameter
Mean follow-up (years)4.7 (SD 2.4)4.7 (SD 2.5)6.6 (SD 3)P = 0.16
Age62.9 (SD 8.1)70.4 (SD 9.7)68 (SD 8.3)P = 0.01
BMI30.9 (SD 6.3)27 (SD 4.5)27.1 (SD 5.7)P = 0.06
Gender15 females, 5 males34 females, 4 males11 females, 1 maleP = 0.34
ASA grade2.25 (SD 0.6)2.16 (SD 0.5)2.17 (SD 0.4)P = 0.76
Preop mean and median OKS19.3 (SD 7.8), 17 (IQR 11)23.1 (SD 8.8), 23.5 (IQR 15)20.4 (SD 7.5), 20.5 (IQR 9)P = 0.37
Preop mean and median OKS functional subscale score10 (SD 3.8), 10 (IQR 6)11 (SD 3.9), 11 (IQR 6)11.3 (SD 3.7), 12 (IQR 6)P = 0.58
Preop mean and median OKS pain subscale score10.5 (SD 5), 10 (IQR 9)11.1 (SD 5.1), 10 (IQR 7)11.7 (SD 5.5), 13 (IQR 7)P = 0.80
Preop mean and median Tegner1.7 (SD 1.4), 2 (IQR 3)1.9 (SD 0.9), 2 (IQR 2)1.5 (SD 1), 1.5 (IQR 1)P = 0.70
Preop mean and median AKSS-O48.7 (SD 14.2), 50 (IQR 14)58 (SD 12.8), 59.5 (IQR 16.5)50 (SD 14.5), 48 (IQR 11)P = 0.18
Preop mean and median AKSS-F62.1 (SD 16.8), 62.5 (IQR 12.5)65.1 (SD 14.3), 70 (IQR 15)60 (SD 12.6), 60 (IQR 15)P = 0.74