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Table 2 Summary of findings

From: Effect of hospital volume on outcomes of total hip arthroplasty: a systematic review and meta-analysis

Outcome

Studies

Hips

Risk ratio

Significance

Postoperative surgical site infection

8

200,950

1.25

CI [1.01, 1.55]

0.04

Cost of surgery

6

129,893

3.44

CI [2.57, 4.30]

< 0.00001

Postoperative length of hospital Stay

9

232,691

0.83

CI [0.48, 1.18]

< 0.00001

Complications during index hospitalization

5

36,159

0.90

CI [0.49, 1.64]

0.73

Complication within 90 days post-op

3

74,409

1.80

CI [1.50, 2.17]

< 0.00001

Revision arthroplasty within 1 year post-op

5

361,440

1.27

CI [0.98, 1.65]

0.07

Long-term revision arthroplasty

5

509,155

1.18

CI [0.86, 1.62]

0.31

30-day mortality

3

140,656

2.33

CI [1.27, 4.28]

0.006

90-day mortality

4

58,688

1.26

CI [1.05, 1.51]

0.01

1-year mortality

4

13,203

2.26

CI [1.32, 3.88]

0.003

Postoperative thromboembolic events

5

147,015

1.28

CI [0.92, 1.77]

0.15

  1. CI confidence interval
  2. *Risk ratio for low-volume hospitals in comparison to high-volume hospitals