Table 2.

Comparison of diagnostic and treatment characteristics of linked and unlinked patients with benefits data (n=239 714)

	Total N (%)	Linked N (%)	Non-linked N (%)	OR (95% CI) for successful linkage	P value	AOR* (95% CI) for successful linkage	P value
Overall	239 714 (100.0)	221 243 (100.0)	18 471 (100.0)	–
Primary psychiatric diagnosis recorded†	239 714 (100.0)
Yes		154 354 (69.8)	10 997 (59.5)	1.57 (1.52 to 1.62)‡	<0.001	1.43 (1.38 to 1.48)‡	<0.001
No		66 889 (30.2)	7474 (40.5)	Reference		Reference	<0.001
Accessed IAPT§	239 714 (100.0)
Yes		50 899 (23.0)	3381 (18.3)	1.33 (1.28 to 1.39)‡	<0.001	1.69 (1.63 to 1.76)‡	<0.001
No		170 344 (77.0)	15 090 (81.7)	Reference		Reference
First contact with SLaM	233 186 (97.3)
Before 2013		121 339 (56.4)	10 989 (61.4)	Reference		Reference
After 2012		93 936 (43.6)	6922 (38.7)	1.23 (1.19 to 1.27)‡	<0.001	1.45 (1.40 to 1.50)‡	<0.001
Last contact with SLaM	235 396 (98.4)
Before 2013		73 945 (34.0)	8486 (47.2)	Reference		Reference
After 2012		143 474 (66.0)	9491 (52.8)	1.73 (1.68 to 1.79)‡	<0.001	2.10 (2.04 to 2.19)‡	<0.001
Age (years) at first presentation to SLaM	235 204 (98.1)
≤20		23 926 (11.0)	2106 (11.7)	Reference		Reference
21–40		92 178 (42.4)	10 834 (60.3)	0.75 (0.71 to 0.79)‡	<0.001	0.67 (0.63 to 0.71)‡	<0.001
41–60		55 388 (25.5)	3593 (20.0)	1.36 (1.28 to 1.43)‡	<0.001	0.98 (0.90 to 1.07)	0.637
>60		45 754 (21.1)	1427 (8.0)	2.82 (2.63 to 3.02)‡	<0.001	1.53 (1.33 to 1.76)‡	<0.001

*AOR: adjusted for age (continuous), sex and ethnicity.

†Latest psychiatric primary diagnosis recorded closest and before window end date (30 June 2019) based on International Classification of Diseases-10 F codes only (mental and behavioural disorders) but excluding non-specific diagnoses, for example, Z*, F99*, FXX.

‡P value≤0.01.

§Accessed IAPT between 2008 and 30 June 2019.

AOR, adjusted OR; IAPT, Improving Access to Psychological Therapies; SLaM, South London and Maudsley.