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Table 2 Preoperative albumin level, total lymphocyte count (TLC), and body mass index (BMI)* analyses – Patient demographics and clinical characteristics

From: Hypoalbuminemia and obesity class II are reliable predictors of peri-prosthetic joint infection in patient undergoing elective total knee arthroplasty

Demographic variablesNormal albumin level
(N = 607)
Hypoalbuminemiaa
(N = 17)
Normal TLC
(N = 361)
Low TLCb
(N = 181)
Normal weightc
(N = 54)
Under-weightd
(N = 5)
Overweighte
(N = 64)
Obesity If
(N = 192)
Obesity IIg
(N = 116)
Age (mean ± SD)67.3 ± 7.268.9 ± 8.267.2 ± 7.468.1 ± 6.967.8 ± 7.657.6 ± 6.369.1 ± 8.168.8 ± 7.264.8 ± 6.0
Sex (%)
 Female75.570.676.271.368.580.073.482.376.7
 Male24.629.423.828.731.520.026.617.723.3
Comorbidities (% (N))
 Hypertension69.9 (424)88.2 (15)68.1 (246)72.4 (131)64.8 (35)40.0 (2)62.5 (40)72.4 (139)73.3 (85)
 Diabetes mellitus26.0 (158)29.4 (5)26.6 (96)22.7 (41)22.2 (12)0.0 (0)18.8 (12)25.5 (49)26.7 (31)
 Renal disease3.1 (19)23.5 (4)2.8 (10)5.0 (9)1.9 (1)0.0 (0)3.1 (2)4.7 (9)6.0 (7)
 Stroke/TIA5.1 (31)5.9 (1)6.4 (23)3.3 (6)9.3 (5)0.0 (0)7.8 (5)6.9 (13)3.4 (4)
 Rheumatological disease4.4 (27)17.6 (3)3.3 (12)8.3 (15)11.1 (6)100.0 (5)7.8 (5)2.1 (4)0.9 (1)
 Gouty arthritis3.1 (19)17.6 (3)2.5 (9)5.5 (10)0.0 (0)0.0 (0)3.1 (2)5.7 (11)5.2 (6)
 Chronic liver disease1.2 (7)0.0 (0)0.8 (3)1.7 (3)0.0 (0)0.0 (0)3.1 (2)1.0 (2)1.7 (2)
 Hypothyroidism3.8 (23)0.0 (0)4.4 (16)2.2 (4)1.9 (1)0.0 (0)3.1 (2)4.2 (8)8.6 (10)
 Depression2.5 (15)11.8 (2)2.8 (10)2.2 (4)1.9 (1)0.0 (0)0.0 (0)3.6 (7)3.4 (4)
 Psychosis0.3 (2)0.0 (0)0.6 (2)0.0 (0)0.0 (0)0.0 (0)0.0 (0)0.5 (1)0.0 (0)
 History of DVT or PE2.1 (13)0.0 (0)2.5 (9)1.1 (2)1.9 (1)0.0 (0)0.0 (0)1.0 (2)0.9 (1)
 Chronic pulmonary disease0.7 (4)0.0 (0)1.1 (4)0.0 (0)0.0 (0)0.0 (0)0.0 (0)1.6 (3)0.0 (0)
 History of myocardial infarct5.3 (32)0.0 (0)4.7 (17)7.2 (13)11.1 (6)0.0 (0)7.8 (5)4.2 (8)5.2 (6)
 Congestive heart failure0.5 (3)0.0 (0)0.6 (2)0.6 (1)0.0 (0)0.0 (0)0.0 (0)0.0 (0)0.9 (1)
 Arrhythmia3.1 (19)0.0 (0)3.3 (12)3.3 (6)7.4 (4)0.0 (0)6.3 (4)1.6 (3)1.7 (2)
 Valvular disease0.8 (5)0.0 (0)0.8 (3)0.6 (1)0.0 (0)0.0 (0)1.6 (1)0.5 (1)2.6 (3)
 Peptic ulcer disease0.5 (3)11.8 (2)0.3 (1)0.6 (1)0.0 (0)0.0 (0)0.0 (0)1.6 (3)0.0 (0)
 Any malignancy4.1 (25)0.0 (0)5.0 (18)4.4 (8)1.9 (1)0.0 (0)3.1 (2)8.3 (16)3.4 (4)
  1. Key: DVT deep vein thrombosis, PE pulmonary embolism, SD standard deviation, TIA transient ischemic attack
  2. *BMI cut-off values for the Asia-Pacific population with reference to the World Health Organization (WHO) international standard [18]
  3. aHypoalbuminemia defined as preoperative serum albumin < 3.5 g/dL
  4. bLow TLC defined as TLC < 1500 cells/mm3
  5. cNormal weight defined as BMI
  6. dUnderweight defined as BMI < 18.5 kg/m2
  7. eOverweight defined as BMI 23.0–24.9 kg/m2
  8. fObesity I defined as BMI 25.0–29.9 kg/m2
  9. gObesity II defined as BMI ≥ 30.0 kg/m2