Table 1.

Intervention parameters

	Mean value	Distribution	Units	References
Intervention effect (proportional change in testing rate)
Addiction services	3.6 (2.3–5.8)	Lognormal (μ=1.285, σ=0.239)	–	5
Prison	2.6 (0.2–34.9)	Lognormal (μ=0.968, σ=1.317)	–	5
Intervention costs (addiction services)
Organisation/coordination of training*	2005.71		Per health board	†
Training session‡	135		Per training session	†
Attendees time§	1620		Per training session	†
Travel reimbursement for training leader¶	90.86		Per training session	†
Total cost per addiction services training	3851.57		Per training session	†
Mean number tested	40.3		Per addiction service**	5
Total intervention cost per test	95.57	Uniform±50%	Per test
Intervention costs (prison)
Organisation/coordination of training††	7020		Per prison	†
Training session‡	135		Per prison	†
Attendees time‡‡	405		Per prison	†
Travel reimbursement for training leader§§	127.20		Per prison	†
Total cost per prison training	7687.20		Per prison	†
Mean number tested per prison	116		Per prison	5
Total intervention cost per test	66.27	Uniform±50%	Per test

All cost estimates assume a staff-nurse cost per hour of £36 (median estimate for band 5 general practice nurse²¹).

*1 Nurse 2 days/week for 6 months for seven health boards. One training session per health board.

†Noel Craine, personal communication.

‡1 Nurse, half day.

§12 Nurses, half day.

¶1200 miles (£0.53 per mile) for travel to seven health boards.

**Assumed 1 addiction service per health board.

††1 Nurse full time for five prisons (1 training session per prison).

‡‡3 Nurses per prison, half day.

§§1200 miles (£0.53 per mile) for five prisons.