Table 2

Comparisons between guideline eras*

GuidelineRCSNICE 2003NICE 2007
Period2000–2002*2004–2006*2009–2011*
Mean number of admissions per year <16 years33 86934 71236 490
IRR for the admission rate (95% CI)1.001.04 (1.01 to 1.06)1.07 (1.04 to 1.10)
Mean number of deaths <16 years665432
IRR for the death rate (95% CI)1.000.82 (0.67 to 1.01)0.48 (0.38 to 0.62)
Mean number of admissions with neurosurgery per year127141123
IRR for the neurosurgery rates (95% CI)1.001.12 (0.97 to 1.30)0.97 (0.83 to 1.12)
Proportion of admissions with a length of stay of <1 day39.3%47.4%56.3%
  • *Comparing the last 3 years of a guidelines use to allow for implementation delays.

  • IRR, incidence rate ratio; NICE, National Institute for Health and Care Excellence; RCS, Royal College of Surgeons.