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Table 1 Patient demographics and preoperative functional scores according to sex for the study cohort (n = 3510)

From: Sex does not clinically influence the functional outcome of total knee arthroplasty but females have a lower rate of satisfaction with pain relief

DemographicDescriptionSexDifference / Odds Ratio
(95% CI)
P-value*
Male
(n = 1584)
Female
(n = 1926)
Age (years: mean, SD)69.4 (9.1)69.2 (10.2)Diff 0.2 (−0.5 to 0.8)0.65
BMI (Kg/M2: mean, SD)29.4 (4.5)30.5 (7.7)Diff 1.1 (−0.7 to 1.6)< 0.001
Comorbidity (n, % of group)Heart Disease (n = 538)322 (20.3)216 (11.2)OR 0.5 (0.4 to 0.6)< 0.001**
Hypertension (n = 1726)802 (50.6)924 (48.0)OR 0.9 (0.8 to 1.0)0.12**
Lung disease (n = 499)200 (12.6)299 (15.5)OR 1.3 (1.1 to 1.5)0.01**
Neurological disease (n = 186)91 (5.7)95 (4.9)OR 0.9 (0.6 to 1.1)0.29**
Diabetes mellitus (n = 398)199 (12.6)199 (10.3)OR 0.8 (0.7 to 1.00.04**
Gastric ulceration (n = 419)137 (8.6)282 (14.6)OR 1.8 (1.5 to 2.2)< 0.001**
Kidney disease (n = 94)39 (2.5)55 (2.9)OR 1.2 (0.8 to 1.8)0.47**
Liver disease (n = 48)25 (1.6)23 (1.2)OR 0.7 (0.4 to 1.3)0.33**
Anaemia (n = 205)69 (4.4)136 (7.1)OR 1.7 (1.2 to 2.2)0.001**
Cancer (n = 156)84 (5.3)72 (3.7)OR 0.69 (0.5 to 0.9)0.03**
Back pain (n = 1572)593 (37.4)979 (50.8)OR 1.7 (1.5 to 2.0)< 0.001**
Depression (n = 444)128 (8.1)316 (16.4)OR 2.2 (1.8 to 2.8)< 0.001**
WOMAC (mean, SD)Pain38.7 (17.9)32.7 (17.5)Diff 6.0 (4.9 to 7.2)< 0.001
Function40.1 (18.0)34.5 (16.7)Diff 5.7 (4.5 to 6.8)< 0.001
Stiffness41.6 (34.2)34.2 (19.2)Diff 7.4 (6.0 to 8.7)< 0.001
Total40.0 (16.9)34.0 (15.9)Diff 5.9 (4.8 to 7.0)< 0.001
SF-12 (mean, SD)Physical28.6 (7.7)27.7 (7.5)Diff 0.9 (0.4 to 1.4)0.001
Mental48.7 (13.2)45.8 (13.6)Diff 2.9 (2.0 to 3.8)< 0.001
  1. *unpaired Students t-test unless otherwise stated, **chi square test