Table 1 |
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|
Patient and Operative Data |
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|
Characteristic |
Unilateral |
Bilateral |
P value |
|
|
|||
|
Number of patients (knees) |
151 |
148 |
N/A |
|
Age in years |
63.8 ± 8.4 (44-84) |
65.1 ± 9.1 (37-87) |
.209 |
|
Sex (M:F)(M%) |
52:99 (34.4%) |
41:107 (27.7%) |
.045 |
|
BMI (kg/m2) |
37. 1 ± 6.6 (30.0-67.8) |
37. 7 ± 5.9 (30.2-61.4) |
.41 |
|
ASA Classificationa (mean) |
2.9 ± 0.5 |
2.8 ± 0.6 |
0.13 |
|
1 (%) |
0 (0%) |
1 (0.7%) |
- |
|
2 (%) |
30 (20.9%) |
41 (27.2%) |
.11 |
|
3 (%) |
100 (70.3%) |
99 (65.6%) |
.90 |
|
4 (%) |
13 (8.8%) |
10 (6.7%) |
.55 |
|
Operative time (min) |
112.7 ± 20.6 (77-181) |
127.4 ± 19.7 (92-223) |
< 0.01 |
|
Tourniquet time (min) |
110.4 ± 18.0 (71-155) |
116.0 ± 18.8 (17-176) |
.01 |
|
Estimated blood loss (mL) |
111.6 ± 117.3 (10-1000) |
176.7 ± 249.7 (25-2500) |
.01 |
|
Change in hemoglobin at discharge (gm/dL) |
-3.1 ± 1.1 (-5.7 - 0) |
-2.9 ± 1.6 (-7.6 - +2) |
.23 |
|
Patients transfused |
21 (13.9%) |
96 (64.9%) |
< .01 |
|
Units transfused (mean) |
0.3 ± 0.7 (0 - 4) |
1.5 ± 1.4 (0 - 6) |
< .01 |
|
Length of hospital stay (days) |
3.30 ± 0.72 (2 - 7) |
3.72 ± 1.09 (2 - 7) |
< .01 |
|
To extended care facility at discharge (percentage) |
42 (27.8%) |
96 (63.6%) |
< .01 |
|
Mean duration of follow-up (months) |
14.9 ± 10.5 (4 - 55) |
15.1 ± 10.5 (3 - 48) |
.90 |
|
|
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|
a ASA Classification: American Society of Anesthesiologists physical status classification system. |
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|
Taylor et al. Journal of Orthopaedic Surgery and Research 2010 5:38 doi:10.1186/1749-799X-5-38 |
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