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Table 2 Pearson correlation of demographic and outcome criteria (* = 0.05 ** = 0.01 *** = 0.001)

From: Influence of surgical approach on heterotopic ossification after total hip arthroplasty – is minimal invasive better? A case control study

Pearson r

N

STD-Watson-Jones

STD-Bauer

AMIS

MIS-AL

MIS

Revision surgery

HO

Gender

Age

Previous THA

STD-Watson-Jones

134

1***

−0.35***

−0.43***

−0.32***

−0.65***

−0.03

0.22**

0.02

0.03

0

STD-Bauer

134

−0.35***

1***

−0.33***

−0.25**

−0.49***

0.03

−0.12

−0.06

0.01

0.1

AMIS

134

−0.43***

−0.33***

1***

−0.31***

0.67***

−0.09

−0.08

−0.06

0.07

−0.04

MIS-AL

134

−0.32***

−0.25**

−0.31***

1***

0.5***

0.12

−0.04

0.11

−0.12

−0.06

MIS

134

−0.65***

−0.49***

0.67***

0.5***

1***

0.01

−0.11

0.03

−0.03

−0.08

Revision surgery

134

−0.03

0.03

−0.09

0.12

0.01

1***

0.04

0.13

0.11

0.02

HO

134

0.22**

−0.12

−0.08

−0.04

−0.11

0.04

1***

0.11

0.14

0.16

Gender

134

0.02

−0.06

−0.06

0.11

0.03

0.13

0.11

1***

0.02

0.04

Age

134

0.03

0.01

0.07

−0.12

−0.03

0.11

0.14

0.02

1***

−0.07

Previous THA

134

0

0.1

−0.04

−0.06

−0.08

0.02

0.16

0.04

−0.07

1***

Diabetes

134

−0.08

0.02

0.03

0.05

0.06

−0.03

−0.05

0.09

0.09

−0.02

Cardiovascular diseases

134

0.01

−0.03

0

0.03

0.02

0.16

0.03

−0.24**

0.48***

−0.18*

Osteoporosis

134

0.11

−0.08

−0.12

0.08

−0.04

0.05

0.22*

0.24**

0.05

0.1

Hospital stay

134

0.13

0.04

−0.24**

0.09

−0.15

0.39***

0.17

0.2*

0.22*

0.12

Intraoperative complications

134

0.1

0.1

−0.09

−0.12

−0.18*

0.2*

0.07

0.13

0.16

0.02

Bleeding

134

0.01

0.17*

−0.1

−0.07

−0.14

−0.04

−0.08

0.05

0.03

0

Wound healing problems/ infections

134

0.05

−0.08

−0.12

0.16

0.01

0.41***

0.03

0.07

−0.06

−0.02

Cardiovascular events

134

−0.07

−0.02

0.18*

−0.1

0.08

0.1

−0.02

0.01

0.04

−0.15

Pulmonary embolism

134

−0.06

−0.04

0.14

−0.04

0.09

−0.02

−0.05

−0.08

0.05

0.12

Postoperative anemia

134

0.15

−0.05

−0.04

−0.07

−0.1

0.21*

0.06

0.17*

0.1

0

Urinary tract infections

134

0.24**

−0.02

−0.14

−0.1

−0.21*

0.1

0.15

0.15

0.07

0

Other neurological deficits/delirium

134

−0.01

0.13

−0.12

0.01

−0.1

−0.07

−0.07

−0.05

0.18*

0.04

Fractures

134

0.09

−0.02

−0.06

−0.01

−0.06

0.25**

0.19*

0.15

0.24**

0.08

Dislocation

134

−0.1

0.17*

0.01

−0.07

−0.04

0.17*

0.01

0.05

0.09

−0.11

Loosening

134

0.13

−0.04

−0.06

−0.04

−0.08

0.34***

0.12

−0.08

0

−0.06

Leg length discrepancy

134

−0.11

0.03

0.1

−0.01

0.08

−0.09

−0.1

0

−0.03

−0.04

Trendelenburg sign/muscular deficits

134

0.09

0.23**

−0.18*

−0.13

−0.27**

0.04

0.07

0.07

0.06

0.07

Local sensory disturbances/pain

134

−0.06

−0.03

0.05

0.05

0.08

0.19*

0.1

0.03

−0.12

0

Pearson r

N

Diabetes

Cardiovasc. diseases

Osteoporosis

Hospital stay

Intraoperative complications

Bleeding

Wound healing problems/infections

Cardiovascular events

Pulmonary embolism

Postoperative anemia

STD-Watson-Jones

134

−0.08

0.01

0.11

0.13

0.1

0.01

0.05

−0.07

−0.06

0.15

STD-Bauer

134

0.02

−0.03

−0.08

0.04

0.1

0.17*

−0.08

−0.02

−0.04

−0.05

AMIS

134

0.03

0

−0.12

−0.24**

−0.09

−0.1

−0.12

0.18*

0.14

−0.04

MIS-AL

134

0.05

0.03

0.08

0.09

−0.12

−0.07

0.16

−0.1

−0.04

−0.07

MIS

134

0.06

0.02

−0.04

−0.15

−0.18*

−0.14

0.01

0.08

0.09

−0.1

Revision surgery

134

−0.03

0.16

0.05

0.39***

0.2*

−0.04

0.41***

0.1

−0.02

0.21*

HO

134

−0.05

0.03

0.22*

0.17

0.07

−0.08

0.03

−0.02

−0.05

0.06

Gender

134

0.09

−0.24**

0.24**

0.2*

0.13

0.05

0.07

0.01

−0.08

0.17*

Age

134

0.09

0.48***

0.05

0.22*

0.16

0.03

−0.06

0.04

0.05

0.1

Previous THA

134

−0.02

−0.18*

0.1

0.12

0.02

0

−0.02

−0.15

0.12

0

Diabetes

134

1***

0.27**

0.03

−0.03

−0.03

−0.07

−0.05

0

0.2*

0.16

Cardiovasc. diseases

134

0.27**

1***

−0.15

0.1

0.09

0.03

0.08

−0.03

0.08

0.17*

Osteoporosis

134

0.03

−0.15

1***

0.12

0.05

−0.04

0.03

−0.06

−0.02

0.02

Hospital stay

134

−0.03

0.1

0.12

1***

0.19*

0.15

0.29***

−0.06

−0.07

0.12

Intraoperative complications

134

−0.03

0.09

0.05

0.19*

1***

0.39***

0.17

−0.05

−0.02

0.29***

Bleeding

134

−0.07

0.03

−0.04

0.15

0.39***

1***

−0.04

−0.03

−0.01

0.06

Wound healing problems/ infections

134

−0.05

0.08

0.03

0.29***

0.17

−0.04

1***

−0.06

−0.02

0.16

Cardiovasc. events

134

0

−0.03

−0.06

−0.06

−0.05

−0.03

−0.06

1***

−0.02

−0.1

Pulmonary embolism

134

0.2*

0.08

−0.02

−0.07

−0.02

−0.01

−0.02

−0.02

1***

0.19*

Postoperative anemia

134

0.16

0.17*

0.02

0.12

0.29***

0.06

0.16

−0.1

0.19*

1***

Urinary tract infections

134

0.1

0.04

0.08

0.12

0.1

−0.03

0.35***

−0.05

−0.02

0.18*

Other neurological deficits/delirium

134

−0.05

0.02

0.14

0.1

0.05

0.15

−0.08

−0.06

−0.02

0.09

Fractures

134

0.06

0.16

0.06

0.33***

0.58***

0.32***

0.52***

0.12

0.15

0.67***

Dislocation

134

0

0.12

0.08

0.21*

0.55***

−0.03

0.21*

−0.05

−0.02

0.28**

Loosening

134

−0.07

0.13

−0.04

−0.04

0.17*

0.32***

0.15

−0.03

−0.01

0.06

Leg length discrepancy

134

−0.04

0.08

−0.02

−0.02

−0.02

−0.01

−0.02

−0.02

−0.01

0.19*

Trendelenburg sign/muscular deficits

134

−0.02

−0.07

−0.12

−0.15

−0.02

0.01

0.07

0.18*

0.14

0.04

Local sensory disturbances/pain

134

−0.06

−0.01

0.16

0.07

0.04

0.06

0.01

−0.01

−0.04

0.08

Pearson r

N

Urinary tract infections

Other neurological Deficits/delirium

Fractures

Dislocation

Loosening

Leg length discrepancy

Trendelenburg sign/muscular deficits

Local sensory disturbances/pain

  

STD-Watson-Jones

134

0.24**

−0.01

0.09

−0.1

0.13

−0.11

0.09

−0.06

  

STD-Bauer

134

−0.02

0.13

−0.02

0.17*

−0.04

0.03

0.23**

−0.03

  

AMIS

134

−0.14

−0.12

−0.06

0.01

−0.06

0.1

−0.18*

0.05

  

MIS-AL

134

−0.1

0.01

−0.01

−0.07

−0.04

−0.01

−0.13

0.05

  

MIS

134

−0.21*

−0.16

−0.06

−0.04

−0.08

0.08

−0.27**

0.08

  

Revision surgery

134

0.1

0.36***

0.25**

0.17*

0.34***

−0.09

0.04

0.19*

  

HO

134

0.15

0.04

0.19*

0.01

0.12

−0.1

0.07

0.1

  

Gender

134

0.15

0.17*

0.15

0.05

−0.08

0

0.07

0.03

  

Age

134

0.07

0.16

0.24**

0.09

0

−0.03

0.06

−0.12

  

Previous THA

134

0

−0.01

0.08

−0.11

−0.06

−0.04

0.07

0

  

Diabetes

134

0.1

0.06

0

−0.07

−0.04

−0.02

−0.06

−0.02

  

Cardiovasc. diseases

134

0.04

0.16

0.12

0.13

0.08

−0.07

−0.01

−0.05

  

Osteoporosis

134

0.08

0.06

0.08

−0.04

−0.02

−0.12

0.16

−0.07

  

Hospital stay

134

0.12

0.33***

0.21*

−0.04

−0.02

−0.15

0.07

−0.09

  

Intraoperative complications

134

0.1

0.58***

0.55***

0.17*

−0.02

−0.02

0.04

0.03

  

Bleeding

134

−0.03

0.32***

−0.03

0.32***

−0.01

0.01

0.06

−0.08

  

Wound healing problems/infections

134

0.35***

0.52***

0.21*

0.15

−0.02

0.07

0.01

0.14

  

Cardiovascular events

134

−0.05

0.12

−0.05

−0.03

−0.02

0.18*

−0.01

0.07

  

Pulmonary embolism

134

−0.02

0.15

−0.02

−0.01

−0.01

0.14

−0.04

−0.04

  

Postoperative anemia

134

0.18*

0.67***

0.28**

0.06

0.19*

0.04

0.08

0.01

  

Urinary tract infection

134

1***

0.5***

0.3***

−0.03

−0.02

0.1

0.08

0.16

  

Other neurological deficits/delirium

134

0.21*

0.39***

−0.06

−0.04

−0.02

−0.06

0.01

−0.07

  

Fractures

134

0.5***

1***

0.37***

0.2*

0.05

0.11

0.07

0.08

  

Dislocation

134

0.3***

0.37***

1***

−0.03

−0.02

−0.06

0.17*

0.07

  

Loosening

134

−0.03

0.2*

−0.03

1***

−0.01

0.13

0.06

0.18*

  

Leg length discrepancy

134

−0.02

0.05

−0.02

−0.01

1***

−0.06

−0.04

0.17*

  

Trendelenburg sign/muscular deficits

134

0.1

0.11

−0.06

0.13

−0.06

1***

0.03

0.05

  

Local sensory disturbances/pain

134

0.08

0.07

0.17*

0.06

−0.04

0.03

1***

−0.05