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Table 3 Age specific trends in annual rates of hospitalisation episodes for TBI, Scotland, 1998 to 2009

From: The epidemiology of hospital treated traumatic brain injury in Scotland

Males

Age group

No. of joinpoints

P value1

Time period

APC2

95% CI3

Age 0-14

1 join point

0.02

1998-2002

0.7

−2.9 to 4.5

   

2002- 2009

−4.9

−6.6 to −3.2

Age 15-34

0 joinpoints

 

1998-2009

−3.8

−5.2 to −2.2

Age 35-64

2 joinpoints

0.01

1998-2002

1.0

−4.2 to 6.5

   

2002-2005

−7.8

−22.5 to 9.5

   

2005-2009

3.1

−2.4 to 9.0

Age 65+

0 Joinpoints

 

1998-2009

0.9

−0.1 to 1.9

Females

Age group

No. of joinpoints

P value 1

Time period

APC 2

95% CI 3

Age 0-14

1 joinpoint

0.023

1998-2003

−0.2

−3.2 to 3

   

2003 -2009

−4.7

−7.2 to −2.1

Age 15-34

2 joinpoints

0.001

1998-2001

4.5

−3.8 to 3.5

   

2001-2004

−12.4

−26.4 to 4.4

   

2004- 2009

1.7

−2.5 to 6.1

Age 35-64

2 joinpoints

0.004

1998-2001

5.4

−6.2 to 18.4

   

2001 -2004

−7.6

−17.5 to 3.6

   

2004-2009

4.5

−3.0 to 12.6

Age 65+

2 joinpoints

0.05

1998-2001

7.3

0.7 to 14.4

   

2001-2004

−2.8

−13.9 to 9.8

   

2004-2009

3.9

1.2 to 6.6

  1. 1The p value relates to likelihood of that number of joinpoints compared to the null hypothesis of zero expected joinpoints.
  2. 2Annual Percentage Change.
  3. 395% Confidence Interval for the APC estimates.