Table 3

Patient and visit level analyses: changes in odds of recorded diagnosis of mental disorder and prescription of antidepressants during stage 1 and stage 2: logistic regression models*

Outcome variable	OR for difference of 1 year during stage 1 (mental health only intervention)			OR for difference of 1 year during stage 2 (NASF programme)			Significance of difference in ORs stage 2 vs stage 1
Outcome variable	OR	95% CI	P value	OR	95% CI	P value	P value†
Mental disorder recorded in patients visiting primary care:
During visit	1.13	1.11 to 1.14	<0.001	0.95	0.94 to 0.95	<0.001	<0.001
During year	1.10	1.09 to 1.11	<0.001	0.97	0.97 to 0.98	<0.001	<0.001
Incident diagnosis during year	0.99	0.98 to 1.00	0.012	0.93	0.92 to 0.93	<0.001	<0.001
Antidepressants prescribed in patients with diagnosis of anxiety or depression:
Any antidepressant during visit	1.07	1.05 to 1.09	<0.001	1.05	1.04 to 1.06	<0.001	0.172
Any antidepressant during year	1.13	1.10 to 1.15	<0.001	1.07	1.06 to 1.08	<0.001	<0.001
Incident antidepressant treatment during year	1.00	0.97 to 1.02	0.655	1.03	1.00 to 1.04	<0.001	0.024
SSRI during visit	1.14	1.12 to 1.18	<0.001	1.09	1.08 to 1.10	<0.001	<0.001
SSRI during year	1.18	1.16 to 1.21	<0.001	1.10	1.09 to 1.12	<0.001	<0.001
Tricyclic during visit	1.03	1.00 to 1.06	<0.001	0.94	0.92 to 0.95	<0.001	<0.001
Tricyclic during year	1.06	1.03 to 1.09	<0.001	0.94	0.93 to 0.95	<0.001	<0.001

*All models also adjusted for age, sex, clinic and intraclass correlation of outcomes within individuals.
†P value for year–stage interaction.
SSRI, selective serotonin reuptake inhibitor.