Table 2 Cohort characteristics of THA/TKA patients with and without current tobacco use
Current tobacco user | Past tobacco user or never used tobacco | Odds ratio | p-value | |
|---|---|---|---|---|
(n = 565) | (n = 7361) | (95 % confidence interval) | ||
N (%) | N (%) | |||
Knee | 228 (5.0 %) | 4049 (95.0 %) | 0.55 (0.46, 0.66) | <0.001 |
Hip | 337 (8.8 %) | 3312 (91.2 %) | 1.0 (ref) | |
Male | 326 (9.3) | 3190 (90.7) | 1.71 (1.44, 2.04) | <0.001 |
Female | 239 (5.4) | 4171 (94.6) | 1.0 (ref) a | |
Age ≤60 | 354 (14.6) | 2076 (85.4) | 1.0 (ref) a | |
61–70 | 143 (5.7) | 2379 (94.3) | 0.38 (0.30, 0.46) | <0.001 |
71–80 | 56 (2.5) | 2170 (97.5) | 0.16 (0.12, 0.22) | <0.001 |
>80 | 12 (1.6) | 736 (98.4) | 0.10 (0.06, 0.18) | <0.001 |
BMI <25 | 118 (10.0) | 1059 (90.0) | 1.0 (ref) a | |
25–29 | 157 (6.5) | 2261 (93.5) | 0.66 (0.51, 0.85) | 0.001 |
30–34 | 144 (6.6) | 2025 (93.4) | 0.70 (0.54, 0.91) | 0.008 |
35–39 | 90 (7.3) | 1145 (92.7) | 0.82 (0.61, 1.09) | 0.17 |
≥40 | 51 (5.7) | 838 (94.3) | 0.65 (0.46, 0.92) | 0.02 |
Implant fixation | ||||
Cemented | 124 (5.4) | 2185 (94.6) | 0.90 (0.62, 1.29) | 0.57 |
Antibiotic/vacuum | 151 (6.0) | 2351 (94.0) | 0.96 (0.69, 1.32) | 0.81 |
No cement | 290 (9.3) | 2825 (90.7) | 1.0 (ref) a | |
Charlson Index = 0 | 309 (8.3) | 3425 (91.7) | 1.0 (ref) a | |
>0 | 256 (6.1) | 3936 (93.9) | 0.76 (0.63, 0.90) | 0.001 |
ASA class 1 | 18 (7.8) | 213 (92.2) | 1.0 (ref) a | |
2 | 393 (7.2) | 5062 (92.8) | 1.05 (0.64, 1.72) | 0.85 |
3 | 148 (6.7) | 2047 (93.3) | 1.00 (0.60, 1.68) | 0.99 |
4 | 5 (11.9) | 37 (88.1) | 1.72 (0.60, 4.95) | 0.31 |