Table 3.
The impact of the National Institute for Health and Care Excellence head injury guidelines on monthly traumatic brain injury hospital admission rate per 100 000 population
| Age band | Winter effect | Initial trend | First NICE guideline | Second NICE guideline | Third NICE guideline | Durbin-Watson statistic |
| 65+ | −0.44 (95% CI: −0.94 to 0.06) p=0.08 |
0.01 (95% CI: −0.02 to 0.05) p=0.42 |
Change level:
1.71 (95% CI:−0.01 to 3.44) p=0.05 Change trend: 0.17 (95% CI: 0.11 to 0.23) p<0.01 |
Change level:
−0.4 (95% CI: −2.08 to 1.27) p=0.64 Change trend: −0.08 (95% CI: −0.13 to −0.03) p<0.01 |
Change level:
0.04 (95% CI:−1.73 to 1.82) p=0.96 Change trend: −0.13 (95% CI:−0.2 to −0.05) p<0.01 |
Untransformed 1.1 Prais-Winsten 2.09 |
| 16–64 | −1.92 (95% CI: −2.77 to −1.07) p<0.01 |
−0.08 (95% CI: −0.13 to −0.02) p<0.01 |
Change level:
5.21 (95% CI: 2.53 to 7.89) p<0.01 Change trend: 0.25 (95% CI: 0.16 to 0.34) p<0.01 |
Change level:
−2.76 (95% CI:−5.35 to −0.16) p=0.04 Change trend: −0.33 (95% CI: −0.42 to −0.25) p<0.01 |
Change level:
−0.72 (95% CI: −3.49 to 2.03) p=0.61 Change trend: 0.02 (95% CI:−0.09 to 0.13) p=0.73 |
Untransformed 1.35 Prais-Winsten 2.11 |
| 0–15 | −2.87 (95% CI: −3.40 to −2.34) p<0.01 |
−0.06 (95% CI:−0.11 to −0.01) p=0.03 |
Change level:
1.3 (95% CI: −1.03 to 3.63) p=0.27 Change trend: 0.02 (95% CI: −0.07 to 0.11) p=0.61 |
Change level:
0.19 (95% CI: −2.09 to 2.47) p=0.87 Change trend −0.005 (95% CI: −0.08 to 0.08) p=0.91 |
Change level:
0.34 (95% CI:−2.03 to 2.72) p=0.78 Change trend: −0.08 (95% CI: −0.19 to 0.03) p=0.17 |
Untransformed 1.07 Prais-Winsten 1.70 |