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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.