NHS Forth Valley segmented regression analysis
| Prescribing measures | Baseline rate, patients prescribed per 1000 at risk (95% CI) | Pre-intervention period trend, change in rate per quarter (95% CI) | Immediate step change in rate at start of intervention period (95% CI) | Change in trend after start of intervention period, change in rate per quarter (95% CI) | Immediate step change in rate at end of intervention period (95% CI) | Change in trend after end of intervention period, change in rate per quarter (95% CI) | Absolute difference at end of intervention period, patients prescribed per 1000 at risk (95% CI) | Absolute difference 12 months post end of intervention period, patients prescribed per 100 00 at risk (95% CI) |
|---|---|---|---|---|---|---|---|---|
| 2013–2014 outcome measures | ||||||||
| ‘Triple whammy’: patients aged ≥65 years prescribed NSAID + ACE/ARB + diuretica | 13.1 (12.4 to 13.8) | −0.2 (−0.2 to −0.1) | −0.5 (−1.3 to 0.3) | −1.2 (−1.4 to −1.1) | 1.5 (1.1 to 1.9) | 1.3 (1.2 to 1.3) | −5.5 (−6.7 to −4.3) | −4.0 (−5.4 to −2.6) |
| NSAIDs in older people: patients aged ≥65 years prescribed NSAID without gastroprotectiona | 44.1 (42.9 to 45.4) | −0.7 (−0.9 to −0.6) | −1.6 (−3.8 to 0.6) | −4.6 (−4.95 to −4.3) | 7.4 (6.2 to 8.5) | 5.2 (4.9 to 5.6) | −20.1 (−23.0 to −17.1) | −10.3 (−13.9 to −6.8) |
| NSAIDs with OAC: patients prescribed OAC + NSAID without gastroprotectionb | 9.1 (8.1 to 10.1) | −0.2 (−0.3 to −0.04) | −2.0 (−3.6 to −0.3) | −0.3 (−0.8 to 0.2) | 0.6 (−0.8 to 2.0) | 0.6 (0.1 to 1.1) | −3.3 (−4.9 to −1.6) | −1.5 (−3.5 to 0.6) |
| 2014–2015 outcome measure | ||||||||
| Antipsychotics in older people: patients aged ≥75 years prescribed oral antipsychoticc | 19.6 (18.7 to 20.5) | 0.1 (−0.01 to 0.1) | −0.1 (−1.1 to 0.8) | 0.1 (−0.1 to 0.3) | −0.6 (−1.4 to 0.2) | 0.3 (0.1 to 0.6) | 0.2 (−1.2 to 1.5) | 1.2 (−0.5 to 2.9) |