Table 4.

Service Utilization: Therapist, Urinalysis, and Incentive Costs per Participant

	BRIEF	THERAPIST	COMPUTER
Therapy
Time in Session (minutes)	86.2 (35.9)	241.4 (147.0)	37.7 (16.1)
* Therapist Costa	$54.4 (20.3)	$164.6 (100.5)	$35.5 (14.8)
Urinalysis
Number of Tests	10.4 (7.6)	14.6 (9.9)	12.2 (9.3)
Staff Cost (10 min per test)	$26.1 (18.9)	$36.6 (24.8)	$30.6 (23.3)
* Total Test Costb	$59.9 (43.5)	$83.9 (56.9)	$70.2 (53.5)
Incentives
Amount Earned	$46.6 (38.0)	$146.6 (168.2)	$114.9 (158.3)
Staff Cost (purchasing)	$10.2 (8.3)	$32.1 (36.8)	$25.1 (34.6)
* Total Incentive Costc	$56.8 (46.2)	$178.7 (205.0)	$140.0 (192.9)
Computer Use ($)	–	–	6.0 (0.0)
Total Cost ($)d	171.1 (103.5)	427.1 (335.7)	251.8 (251.1)

^*Therapist cost is mean time spent in all sessions per participant plus 20 minutes per session attended for administrative time multiplied by therapist wage/fringe. Total urinalysis test cost is the cost of the testing supplies plus wage/benefits for staff time (10 minutes per test) multiplied by the number of tests attended per participant. Total incentive cost is the total amount earned by each participant plus wage/fringe benefits for staff time to purchase and administer incentives (administration costs were 5 hours per month distributed proportionately based on incentive earnings across all participants). Paired t-tests were performed for therapist cost, urinalysis cost, incentive cost, and total cost.

^aTHERAPIST > BRIEF, t = 4.31, p < .001; COMPUTER < BRIEF, t = −3.61, p < .001; COMPUTER < THERAPIST, t = −6.96, p < .001

^bTHERAPIST > BRIEF, t =1.47, p =.151; COMPUTER > BRIEF, t =0.66, p =.513; COMPUTER < THERAPIST, t = −0.95, p =.344

^cTHERAPIST > BRIEF, t =2.33, p =.024; COMPUTER > BRIEF, t=1.69, p =0.098 COMPUTER < THERAPIST, t = −0.75, p =.459

^dTHERAPIST > BRIEF, t =2.96, p < .01; COMPUTER > BRIEF, t=1.23, p =.227 COMPUTER < THERAPIST, t =−2.28, p =.027