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Table 3 Univariate analysis of postoperative outcomes stratified by preoperative weight loss in the general population

From: Preoperative weight loss before total hip arthroplasty negatively impacts postoperative outcomes

Outcome

Total Sample

No Weight Loss

Weight Loss

P-value

Length of Stay (Days from Operation to Discharge) (Range)

2.24 (0–116)

2.23 (0–116)

3.62 (0–67)

<0.001

Operative Time (Range)

91.4 (0–1387)

91.4 (0–1387)

92.0 (3–300)

0.73

Discharge Destination

   

<0.001

 Home

222,683 (83.8%)

222,339 (83.9%)

344 (60.6%)

 

 Non-Home

41,602 (15.7%)

41,395 (15.6%)

207 (36.4%)

 

 Unknown

1,372 (0.5%)

1,355 (0.5%)

17 (3.0%)

 

Return to OR

   

0.001

 Yes

5,052 (1.9%)

5,030 (1.9%)

22 (3.9%)

 

 No

260,605 (98.1%)

260,059 (98.1%)

546 (96.1%)

 

Still in Hospital after 30 days

   

0.002

 Yes

145 (0.1%)

143 (0.1%)

2 (0.3%)

 

 No

265,512 (99.9%)

264,946 (99.9%)

566 (99.7%)

 

Readmission

   

<0.001

 Yes

8,990 (3.4%)

8,941 (3.4%)

49 (8.6%)

 

 No

256,667 (96.6%)

256,148 (96.6%)

519 (91.4%)

 

Superficial SSI

   

0.65

 Yes

1,827 (0.7%)

1,824 (0.7%)

3 (0.5%)

 

 No

263,830 (99.3%)

263,265 (99.3%)

565 (99.5%)

 

Deep SSI

   

0.10

 Yes

559 (0.2%)

556 (0.2%)

3 (0.5%)

 

 No

265,098 (99.8%)

264,533 (99.8%)

565 (99.5%)

 

Organ Space SSI

   

0.09

 Yes

817 (0.3%)

813 (0.3%)

4 (0.7%)

 

 No

264,840 (99.7%)

264,276 (99.7%)

564 (99.3%)

 

Wound Dehiscence

   

0.15

 Yes

355 (0.1%)

353 (0.1%)

2 (0.3%)

 

 No

265,302 (99.9%)

264,736 (99.9%)

566 (99.7%)

 

Pneumonia

   

<0.001

 Yes

899 (0.3%)

881 (0.3%)

18 (3.2%)

 

 No

264,758 (99.7%)

264,208 (99.7%)

550 (96.8%)

 

Reintubation

   

<0.001

 Yes

396 (0.1%)

388 (0.1%)

8 (1.4%)

 

 No

265,261 (99.9%)

264,701 (99.9%)

560 (98.6%)

 

Pulmonary Embolism

   

0.66

 Yes

688 (0.3%)

686 (0.3%)

2 (0.3%)

 

 No

264,969 (99.7%)

264,403 (99.7%)

566 (99.7%)

 

Failure to Wean

   

<0.001

 Yes

159 (0.1%)

154 (0.1%)

5 (0.9%)

 

 No

265,498 (99.9%)

264,935 (99.9%)

563 (99.1%)

 

Progressive Renal Insufficiency

   

<0.001

 Yes

235 (0.1%)

232 (0.1%)

3 (0.5%)

 

 No

265,422 (99.9%)

264,857 (99.9%)

565 (99.5%)

 

Acute Renal Failure

   

0.18

 Yes

132 (0.1%)

131 (0.1%)

1 (0.2%)

 

 No

265,525 (99.9%)

264,958 (99.9%)

567 (99.8%)

 

Urinary Tract Infection

   

0.001

 Yes

2,260 (0.9%)

2,248 (0.9%)

12 (2.1%)

 

 No

263,397 (99.1%)

262,841 (99.1%)

556 (97.9%)

 

CVA/Stroke

   

0.52

 Yes

247 (0.1%)

246 (0.1%)

1 (0.2%)

 

 No

265,410 (99.9%)

264,843 (99.9%)

567 (99.8%)

 

Cardiac Arrest

   

<0.001

 Yes

228 (0.1%)

225 (0.1%)

3 (0.5%)

 

 No

265,429 (99.9%)

264,864 (99.9%)

565 (99.5%)

 

Myocardial Infarction

   

0.002

 Yes

629 (0.2%)

624 (0.2%)

5 (0.9%)

 

 No

265,028 (99.8%)

264,465 (99.8%)

563 (99.1%)

 

Bleeding Transfusion

   

<0.001

 Yes

13,484 (5.1%)

13,398 (5.1%)

86 (15.1%)

 

 No

252,173 (94.9%)

251,691 (94.9%)

482 (84.9%)

 

Deep Venous Thrombosis

   

0.39

 Yes

862 (0.3%)

859 (0.3%)

3 (0.5%)

 

 No

264,795 (99.7%)

264,230 (99.7%)

565 (99.5%)

 

Sepsis

   

<0.001

 Yes

622 (0.2%)

616 (0.2%)

6 (1.1%)

 

 No

265,035 (99.8%)

264,473 (99.8%)

562 (98.9%)

 

Septic Shock

   

<0.001

 Yes

169 (0.1%)

163 (0.1%)

6 (1.1%)

 

 No

265,488 (99.9%)

264,926 (99.9%)

562 (98.9%)

 

Any Medical Complication

   

<0.001

 Yes

21,311 (8.0%)

21,188 (8.0%)

123 (21.7%)

 

 No

244,346 (92.0%)

243,901 (92.0%)

445 (78.3%)