Table 2

Results of segmented regression analysis of prescribing patterns

	Estimate (%)	LCL	UCL	P values
Antipsychotic prescribing
Intercept	32.62	32.45	32.80	<0.0001
Monthly change before	−0.01	−0.05	0.03	0.4923
Immediate change after newspaper article	−1.28	−1.48	−1.08	<0.0001
Additional monthly change after newspaper article	−0.20	−0.24	−0.16	<0.0001
Immediate change after CIHI report	−0.51	−0.74	−0.29	<0.0001
Additional monthly change after CIHI report	0.06	0.02	0.09	0.002
Benzodiazepine prescribing
Intercept	14.16	13.91	14.40	<0.0001
Monthly change before	−0.06	−0.11	−0.004	0.0376
Immediate change after newspaper article	−0.45	−0.71	−0.19	0.0018
Additional monthly change after newspaper article	−0.01	−0.07	0.04	0.5989
Immediate change after CIHI report	0.10	−0.22	0.43	0.5196
Additional monthly change after CIHI report	0.03	−0.02	0.07	0.2507
Trazodone prescribing
Intercept	22.65	22.50	22.81	<0.0001
Monthly change before	0.10	0.06	0.13	<0.0001
Immediate change after newspaper article	−0.08	−0.26	0.09	0.3364
Additional monthly change after newspaper article	0.01	−0.03	0.05	0.5981
Immediate change after CIHI report	0.13	−0.07	0.32	0.1971
Additional monthly change after CIHI report	0.0003	−0.03	0.03	0.9848
Statins prescribing
Intercept	19.86	19.69	20.04	<0.0001
Monthly change before	−0.06	−0.09	−0.02	0.0048
Immediate change after newspaper article	0.02	−0.17	0.22	0.7913
Additional monthly change after newspaper article	−0.08	−0.12	−0.03	0.001
Immediate change after CIHI report	−0.22	−0.43	−0.01	0.0444
Additional monthly change after CIHI report	0.06	0.02	0.09	0.0051

CIHI, Canadian Institute for Health Information; LCL, lower control limit; UCL, upper control limit.