Table 3.

Immediate change in level and change in trend in composite high risk prescribing after intervention*

Outcome	Odds ratio (95% CI) per year	P value
Time trend (change per year before intervention)	0.92 (0.91 to 0.94)	<0.001
Change in level of high risk prescribing in quarter immediately after intervention started:
Arm 1—usual care	0.97 (0.94 to 1.01)	0.10
Arm 2—feedback	1.00 (0.96 to 1.03)	0.85
Arm 3—feedback plus behavioural change component	0.96 (0.92 to 1.00)	0.05
Change in time trend per year after intervention:
Arm 1—usual care	0.99 (0.94 to 1.04)	0.72
Arm 2—feedback	0.87 (0.83 to 0.92)	<0.001
Arm 3—feedback plus behavioural change component	0.88 (0.84 to 0.93)	<0.001

*Adjusted for two stratification variables (health board and third of primary outcome baseline performance).