Results of the interrupted time series analysis of the impact of the PAD guideline on annual admission rates for revascularization for PAD; England (1 April 2008–31 March 2018)
| . | Estimate (admissions per 100 000 population per year) . | 95% c.i. . | P . |
|---|---|---|---|
| Revascularization for moderate PAD | |||
| Intercept (admission rate in 2008–2009) | 50.05 | (48.38,51.72) | <0.001 |
| Trend before the guideline (annual increase in admission rate from 2008–2009 to 2012–2013) | 0.29 | (−0.22,0.80) | 0.30 |
| Level change after the guideline (step change in rate in 2013–2014) | 1.90 | (−0.16,3.96) | 0.12 |
| Change in trend after the guideline (annual change in trend from 2013–2014 to 2017–2018) | −2.81 | (−3.52,−2.10) | <0.001 |
| Change in admission rate: 2017–2018 compared with 2012–2013 (calculated using above results) | |||
| Absolute change (admissions per 100 000 population per year) | −10.7 | ||
| Relative change (%) | −20.8% | ||
| Revascularization for severe PAD | |||
| Intercept (admission rate in 2008–2009) | 32.36 | (30.52,34.20) | < 0.001 |
| Trend before the guideline (annual increase in admission rate from 2008–2009 to 2012–2013) | 1.33 | (0.78,1.88) | <0.001 |
| Level change after the guideline (step change in rate in 2013–2014) | 1.89 | (−0.38,4.16) | 0.16 |
| Change in trend after the guideline (annual change in trend from 2013–2014 to 2017–2018) | −1.95 | (−2.73,−1.17) | <0.001 |
| Change in admission rate: 2017–2018 compared with 2012–2013 (calculated using above results) | |||
| Absolute change (admissions per 100 000 population per year) | −1.2 | ||
| Relative change (%) | −3.1% | ||
| . | Estimate (admissions per 100 000 population per year) . | 95% c.i. . | P . |
|---|---|---|---|
| Revascularization for moderate PAD | |||
| Intercept (admission rate in 2008–2009) | 50.05 | (48.38,51.72) | <0.001 |
| Trend before the guideline (annual increase in admission rate from 2008–2009 to 2012–2013) | 0.29 | (−0.22,0.80) | 0.30 |
| Level change after the guideline (step change in rate in 2013–2014) | 1.90 | (−0.16,3.96) | 0.12 |
| Change in trend after the guideline (annual change in trend from 2013–2014 to 2017–2018) | −2.81 | (−3.52,−2.10) | <0.001 |
| Change in admission rate: 2017–2018 compared with 2012–2013 (calculated using above results) | |||
| Absolute change (admissions per 100 000 population per year) | −10.7 | ||
| Relative change (%) | −20.8% | ||
| Revascularization for severe PAD | |||
| Intercept (admission rate in 2008–2009) | 32.36 | (30.52,34.20) | < 0.001 |
| Trend before the guideline (annual increase in admission rate from 2008–2009 to 2012–2013) | 1.33 | (0.78,1.88) | <0.001 |
| Level change after the guideline (step change in rate in 2013–2014) | 1.89 | (−0.38,4.16) | 0.16 |
| Change in trend after the guideline (annual change in trend from 2013–2014 to 2017–2018) | −1.95 | (−2.73,−1.17) | <0.001 |
| Change in admission rate: 2017–2018 compared with 2012–2013 (calculated using above results) | |||
| Absolute change (admissions per 100 000 population per year) | −1.2 | ||
| Relative change (%) | −3.1% | ||
PAD, peripheral arterial disease.
Results of the interrupted time series analysis of the impact of the PAD guideline on annual admission rates for revascularization for PAD; England (1 April 2008–31 March 2018)
| . | Estimate (admissions per 100 000 population per year) . | 95% c.i. . | P . |
|---|---|---|---|
| Revascularization for moderate PAD | |||
| Intercept (admission rate in 2008–2009) | 50.05 | (48.38,51.72) | <0.001 |
| Trend before the guideline (annual increase in admission rate from 2008–2009 to 2012–2013) | 0.29 | (−0.22,0.80) | 0.30 |
| Level change after the guideline (step change in rate in 2013–2014) | 1.90 | (−0.16,3.96) | 0.12 |
| Change in trend after the guideline (annual change in trend from 2013–2014 to 2017–2018) | −2.81 | (−3.52,−2.10) | <0.001 |
| Change in admission rate: 2017–2018 compared with 2012–2013 (calculated using above results) | |||
| Absolute change (admissions per 100 000 population per year) | −10.7 | ||
| Relative change (%) | −20.8% | ||
| Revascularization for severe PAD | |||
| Intercept (admission rate in 2008–2009) | 32.36 | (30.52,34.20) | < 0.001 |
| Trend before the guideline (annual increase in admission rate from 2008–2009 to 2012–2013) | 1.33 | (0.78,1.88) | <0.001 |
| Level change after the guideline (step change in rate in 2013–2014) | 1.89 | (−0.38,4.16) | 0.16 |
| Change in trend after the guideline (annual change in trend from 2013–2014 to 2017–2018) | −1.95 | (−2.73,−1.17) | <0.001 |
| Change in admission rate: 2017–2018 compared with 2012–2013 (calculated using above results) | |||
| Absolute change (admissions per 100 000 population per year) | −1.2 | ||
| Relative change (%) | −3.1% | ||
| . | Estimate (admissions per 100 000 population per year) . | 95% c.i. . | P . |
|---|---|---|---|
| Revascularization for moderate PAD | |||
| Intercept (admission rate in 2008–2009) | 50.05 | (48.38,51.72) | <0.001 |
| Trend before the guideline (annual increase in admission rate from 2008–2009 to 2012–2013) | 0.29 | (−0.22,0.80) | 0.30 |
| Level change after the guideline (step change in rate in 2013–2014) | 1.90 | (−0.16,3.96) | 0.12 |
| Change in trend after the guideline (annual change in trend from 2013–2014 to 2017–2018) | −2.81 | (−3.52,−2.10) | <0.001 |
| Change in admission rate: 2017–2018 compared with 2012–2013 (calculated using above results) | |||
| Absolute change (admissions per 100 000 population per year) | −10.7 | ||
| Relative change (%) | −20.8% | ||
| Revascularization for severe PAD | |||
| Intercept (admission rate in 2008–2009) | 32.36 | (30.52,34.20) | < 0.001 |
| Trend before the guideline (annual increase in admission rate from 2008–2009 to 2012–2013) | 1.33 | (0.78,1.88) | <0.001 |
| Level change after the guideline (step change in rate in 2013–2014) | 1.89 | (−0.38,4.16) | 0.16 |
| Change in trend after the guideline (annual change in trend from 2013–2014 to 2017–2018) | −1.95 | (−2.73,−1.17) | <0.001 |
| Change in admission rate: 2017–2018 compared with 2012–2013 (calculated using above results) | |||
| Absolute change (admissions per 100 000 population per year) | −1.2 | ||
| Relative change (%) | −3.1% | ||
PAD, peripheral arterial disease.
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