Table 2.

Patient engagement methods for phase 1

	Face-to-face same day	Face-to-face prebooking	Telephoning*	SMS messaging
No of GP practices using a given method†	8	2	2	8
Total no of sampling days that the given method was used‡	68	15.5	15.5	81
Eligible patients telephoned/sent SMS message*	–	–	114	2653
Patients booking an appointment	–	81	68	345
Patients attending booked appointments§	206 (100%)	69 (85%)	57 (84%)	301 (87%)
Patients recruitment per sampling day (mean)	3.0	4.5	3.7	3.7
Patients recruitment per practice per day (mean)	0.37	2.25	1.84	0.46

*Unanswered/wrong number calls are unrecorded.

†A total to 16 practices contributed to recruitment during phase 1, four practices used a combination of face-to-face enrolment and either telephoning or SMS messaging, hence they are counted twice for the purposes of this table.

‡Recruitment could occur at two GP practices at any one time, hence, for the purposes of this table only, sampling days could be counted twice, hence total is >192 days.

§Values in parenthesis represent percentage of patients agreeing to breath testing who actually completed the test.

GP, general practitioner; SMS, Short Message Service.