Skip to main content

Table 1 Baseline demographics and clinical characteristics of the patient population

From: Weight changes after total knee arthroplasty in Chinese patients: a matched cohort study regarding predictors and outcomes

Parameters Simultaneous bilateral TKA (n = 49) Staged bilateral TKA (n = 52) Unilateral TKA (n = 101) All TKA patients (n = 202)
Age (years) 68.9 ± 7.9 68.9 ± 7.1 69.8 ± 6.7 69.4 ± 7.1
Male/female 17/32 20/32 37/64 74/1128
Height (m) 1.65 ± 0.07 1.64 ± 0.08 1.65 ± 0.07 1.65 ± 0.07
Weight (kg) 70.98 ± 8.55 70.49 ± 7.25 72.31 ± 8.95 71.52 ± 8.44
BMI (kg/m2) 26.15 ± 2.74 26.45 ± 3.43 26.49 ± 3.14 26.40 ± 3.12
BMI category
 Normal weight (18.50–24.99) 17 (34.7%) 21 (40.4%) 32 (31.7%) 70 (34.7%)
 Overweight (25.00–29.99) 29 (59.2%) 23 (44.2%) 58 (57.4%) 110 (54.5%)
 Obese I (30.00–34.99) 3 (6.1%) 8 (15.4%) 9 (8.9%) 20 (9.9%)
 Obese class II (35.00–35.99) 0 0 2 (2.0%) 2 (1.0%)
Charlson-Deyo comorbidity index
 0 28 36 41 105 (52.0%)
 1 to 2 21 15 58 94 (46.5%)
 ≥ 3 0 1 2 3 (1.5%)
 Total WOMAC score 56.1 ± 4.5 57.0 ± 3.9 56.0 ± 3.9 56.3 ± 4.0
 WOMAC pain score 13.1 ± 2.1 13.6 ± 2.1 12.5 ± 2.5 12.9 ± 2.3
 WOMAC stiffness score 3.6 ± 1.3 3.9 ± 1.3 3.1 ± 1.5 3.4 ± 1.4
 WOMAC function score 39.3 ± 3.5 39.4 ± 3.3 40.4 ± 3.8 39.9 ± 3.6
 SF-36 PCS score 35.0 ± 4.5 35.1 ± 5.3 36.0 ± 4.6 35.5 ± 4.8
 SF-36 MCS score 45.6 ± 5.0 45.5 ± 6.2 44.4 ± 3.7 45.0 ± 4.8
  1. BMI body mass index, WOMAC Western Ontario and McMaster Universities Osteoarthritis Index, Total WOMAC score WOMAC pain score + WOMAC stiffness score + WOMAC function score, SF-36 36-item short form health survey, PCS Physical Component Summary, MCS Mental Component Summary