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Table 1 Comparison of characteristics of patients with and without current tobacco use assessment among patients who underwent primary THA or TKA

From: Current tobacco use is associated with higher rates of implant revision and deep infection after total hip or knee arthroplasty: a prospective cohort study

  Tobacco use assessed Tobacco use not assessed Odds Ratio p-value
(n = 7926) (n = 446) (95 % confidence interval)
  N (%) N (%)   
Knee 4,277 (94.5 %) 249 (5.5 %) 0.93 (0.76, 1.12) 0.44
Hip 3,649 (94.9 %) 197 (5.1 %) 1.0 (ref)  
Male 3516 (94.1) 219 (5.9) 0.82 (0.68, 0.99) 0.04
Female 4410 (95.1) 227 (4.9) 1.0 (ref) a  
Age ≤60 2430 (93.8) 161 (6.2) 1.0 (ref) a  
 61–70 2522 (94.2) 154 (5.8) 1.10 (0.88, 1.39) 0.40
 71–80 2226 (95.5) 104 (4.5) 1.44 (1.12, 1.86) 0.005
 >80 748 (96.5) 27 (3.5) 1.86 (1.22, 2.81) 0.004
BMI < 25 1177 (95.4) 57 (4.6) 1.0 (ref) a  
 25–29 2418 (94.4) 144 (5.6) 0.82 (0.60, 1.12) 0.21
 30–34 2169 (95.2) 109 (4.8) 0.97 (0.70, 1.35) 0.86
 35–39 1235 (94.4) 73 (5.6) 0.83 (0.58, 1.18) 0.30
 ≥40 889 (93.8) 59 (6.2) 0.74 (0.50, 1.08) 0.12
Cemented 2309 (94.6) 133 (5.4) 1.12 (0.71, 1.76) 0.62
Antibiotic/vacuum 2502 (94.6) 142 (5.4) 1.12 (0.74, 1.71) 0.59
No cement 3115 (94.8) 171 (5.2) 1.0 (ref) a  
Charlson Index = 0 3734 (94.6) 212 (5.4) 1.0 (ref) a  
>0 4192 (94.7) 234 (5.3) 1.02 (0.84, 1.24) 0.81
ASA = 1 231 (95.4) 11 (4.6) 1.0 (ref) a  
 2 5455 (94.8) 298 (5.2) 0.89 (0.48, 1.64) 0.70
 3 2195 (94.3) 133 (5.7) 0.80 (0.43, 1.51) 0.49
 4 42 (91.3) 4 (8.7) 0.51 (0.15, 1.66) 0.26
  1. ASA American Society of Anesthesiologist, BMI body mass index in kg/m2, Ref reference category, SD standard deviation
  2. a the model was adjusted for the joint type (TKA vs. THA)