Table 1.

Characteristics of participants (n = 26) and practices (n = 19)

Participant characteristic	Variable	Number of participants
Job Role	GP	9
	Practice Nurse	13
	Practice Manager	3
	Receptionist	1
Gender	Male	5
	Female	23
Age	30–40	3
	41–50	6
	51–60	6
	Unknown or did not wish to declare	11
Treating young people or providing sexual health services	None	7
	Some	6
	Heavily involved	13
Practice characteristic	Variable	Number of participants
Local Authority	Devon	3
	Kingston	4
	Luton	2
	North Somerset	5
	York and North Yorkshire	10
	Lincolnshire	2
Phase of implementation (stepped wedge design) [15]	1	4
	2	19
	3	3
Enhanced service	Yes	14
	No	8
	Unknown	4
Chlamydia testing rate higher than England median (pre-intervention)	Yes	19
	No	7
Number of GPs employed	2–5	8
	6–10	5
	11–15	4
	16+	9