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Table 5 Sub-tests predicting concussion, logistic regression model odds ratios

From: The performance of the World Rugby Head Injury Assessment Screening Tool: a diagnostic accuracy study

Sub-test

Odds Ratio

Standard error

z

p value

95% LCL

95% UCL

Baseline thresholds

 Maddocks questions

1.9

0.8

1.6

0.1

0.9

4.2

 Immediate memorya

 Digits backwards

1.9

0.4

3.5

< 0.01

1.3

2.7

 Tandem gaita

 Symptoms

6.8

1.3

10.1

< 0.01

4.7

9.9

 Delayed recall

1.8

0.3

3.4

< 0.01

1.3

2.5

 Clinical signs

6.9

1.6

8.6

< 0.01

4.5

10.8

Normative thresholds

 Maddocks questionsa

 Immediate memorya

 Digits backwards

1.9

0.3

3.7

< 0.01

1.4

2.7

 Tandem gaita

 Symptoms

6.8

1.2

11.2

< 0.01

4.9

9.5

 Delayed recall

3.7

0.9

5.3

< 0.01

2.3

6.1

 Clinical signs

6.6

1.5

8.6

< 0.01

4.3

10.1

 

  1. LCL lower confidene limit, UCL upper confidence limit
  2. aExcluded from final prediction model