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Table 2 Baseline ARCO stage, operation time, and blood loss in groups A and B

From: One-stage simultaneous hip-preserving surgeries for the management of bilateral femoral head osteonecrosis: a mean 7.0-year follow-up

Parameters

Group A

Group B

p value*

ARCO stage

0.809

 IIA

12

3

 IIB

28

5

 IIC

19

5

 IIIA

4

18

 IIIB

4

18

 IIIC

2

20

Operation time (minutes; mean ± SD [range])

50.5 ± 6.5 (41–60)

170.6 ± 7.8 (161–180)

< 0.01

Blood loss (ml; mean ± SD [range])

45.8 ± 7.5 (36–55)

180.7 ± 12.5 (165–200)

< 0.01

  1. ARCO, Association for Research on Osseous Circulation. *p values indicated inter-group differences comparison. Continuous data was analyzed via paired t test, while non-parametric data was analyzed via the Wilcoxon rank sum test
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Journal of Orthopaedic Surgery and Research

ISSN: 1749-799X